[PATCH AUTOSEL 4.18 01/27] ARM: dts: imx53-qsb: disable 1.2GHz OPP

[PATCH AUTOSEL 4.18 01/27] ARM: dts: imx53-qsb: disable 1.2GHz OPP

[Sasha Levin]

From: Sascha Hauer <s.hauer@pengutronix.de>

[ Upstream commit eea96566c189c77e5272585984eb2729881a2f1d ]

The maximum CPU frequency for the i.MX53 QSB is 1GHz, so disable the
1.2GHz OPP. This makes the board work again with configs that have
cpufreq enabled like imx_v6_v7_defconfig on which the board stopped
working with the addition of cpufreq-dt support.

Fixes: 791f416608 ("ARM: dts: imx53: add cpufreq-dt support")

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm/boot/dts/imx53-qsb-common.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm/boot/dts/imx53-qsb-common.dtsi b/arch/arm/boot/dts/imx53-qsb-common.dtsi
index ef7658a78836..c1548adee789 100644
--- a/arch/arm/boot/dts/imx53-qsb-common.dtsi
+++ b/arch/arm/boot/dts/imx53-qsb-common.dtsi
@@ -123,6 +123,17 @@
 	};
 };
 
+&cpu0 {
+	/* CPU rated to 1GHz, not 1.2GHz as per the default settings */
+	operating-points = <
+		/* kHz   uV */
+		166666  850000
+		400000  900000
+		800000  1050000
+		1000000 1200000
+	>;
+};
+
 &esdhc1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_esdhc1>;
-- 
2.17.1

[PATCH AUTOSEL 4.18 02/27] s390/hibernate: fix error handling when suspend cpu != resume cpu

[Sasha Levin]

From: Gerald Schaefer <gerald.schaefer@de.ibm.com>

[ Upstream commit 55a5542a546238354d1f209f794414168cf8c71d ]

The resume code checks if the resume cpu is the same as the suspend cpu.
If not, and if it is also not possible to switch to the suspend cpu, an
error message should be printed and the resume process should be stopped
by loading a disabled wait psw.

The current logic is broken in multiple ways, the message is never printed,
and the disabled wait psw never loaded because the kernel panics before that:
- sam31 and SIGP_SET_ARCHITECTURE to ESA mode is wrong, this will break
  on the first 64bit instruction in sclp_early_printk().
- The init stack should be used, but the stack pointer is not set up correctly
  (missing aghi %r15,-STACK_FRAME_OVERHEAD).
- __sclp_early_printk() checks the sclp_init_state. If it is not
  sclp_init_state_uninitialized, it simply returns w/o printing anything.
  In the resumed kernel however, sclp_init_state will never be uninitialized.

This patch fixes those issues by removing the sam31/ESA logic, adding a
correct init stack pointer, and also introducing sclp_early_printk_force()
to allow using sclp_early_printk() even when sclp_init_state is not
uninitialized.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/s390/include/asm/sclp.h        |  3 ++-
 arch/s390/kernel/early_printk.c     |  2 +-
 arch/s390/kernel/swsusp.S           |  8 +++-----
 drivers/s390/char/sclp_early_core.c | 11 ++++++++---
 4 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h
index 3cae9168f63c..e44a8d7959f5 100644
--- a/arch/s390/include/asm/sclp.h
+++ b/arch/s390/include/asm/sclp.h
@@ -108,7 +108,8 @@ int sclp_early_get_core_info(struct sclp_core_info *info);
 void sclp_early_get_ipl_info(struct sclp_ipl_info *info);
 void sclp_early_detect(void);
 void sclp_early_printk(const char *s);
-void __sclp_early_printk(const char *s, unsigned int len);
+void sclp_early_printk_force(const char *s);
+void __sclp_early_printk(const char *s, unsigned int len, unsigned int force);
 
 int _sclp_get_core_info(struct sclp_core_info *info);
 int sclp_core_configure(u8 core);
diff --git a/arch/s390/kernel/early_printk.c b/arch/s390/kernel/early_printk.c
index 9431784d7796..40c1dfec944e 100644
--- a/arch/s390/kernel/early_printk.c
+++ b/arch/s390/kernel/early_printk.c
@@ -10,7 +10,7 @@
 
 static void sclp_early_write(struct console *con, const char *s, unsigned int len)
 {
-	__sclp_early_printk(s, len);
+	__sclp_early_printk(s, len, 0);
 }
 
 static struct console sclp_early_console = {
diff --git a/arch/s390/kernel/swsusp.S b/arch/s390/kernel/swsusp.S
index a049a7b9d6e8..c1a080b11ae9 100644
--- a/arch/s390/kernel/swsusp.S
+++ b/arch/s390/kernel/swsusp.S
@@ -198,12 +198,10 @@ pgm_check_entry:
 
 	/* Suspend CPU not available -> panic */
 	larl	%r15,init_thread_union
-	ahi	%r15,1<<(PAGE_SHIFT+THREAD_SIZE_ORDER)
+	aghi	%r15,1<<(PAGE_SHIFT+THREAD_SIZE_ORDER)
+	aghi	%r15,-STACK_FRAME_OVERHEAD
 	larl	%r2,.Lpanic_string
-	lghi	%r1,0
-	sam31
-	sigp	%r1,%r0,SIGP_SET_ARCHITECTURE
-	brasl	%r14,sclp_early_printk
+	brasl	%r14,sclp_early_printk_force
 	larl	%r3,.Ldisabled_wait_31
 	lpsw	0(%r3)
 4:
diff --git a/drivers/s390/char/sclp_early_core.c b/drivers/s390/char/sclp_early_core.c
index eceba3858cef..2f61f5579aa5 100644
--- a/drivers/s390/char/sclp_early_core.c
+++ b/drivers/s390/char/sclp_early_core.c
@@ -210,11 +210,11 @@ static int sclp_early_setup(int disable, int *have_linemode, int *have_vt220)
  * Output one or more lines of text on the SCLP console (VT220 and /
  * or line-mode).
  */
-void __sclp_early_printk(const char *str, unsigned int len)
+void __sclp_early_printk(const char *str, unsigned int len, unsigned int force)
 {
 	int have_linemode, have_vt220;
 
-	if (sclp_init_state != sclp_init_state_uninitialized)
+	if (!force && sclp_init_state != sclp_init_state_uninitialized)
 		return;
 	if (sclp_early_setup(0, &have_linemode, &have_vt220) != 0)
 		return;
@@ -227,5 +227,10 @@ void __sclp_early_printk(const char *str, unsigned int len)
 
 void sclp_early_printk(const char *str)
 {
-	__sclp_early_printk(str, strlen(str));
+	__sclp_early_printk(str, strlen(str), 0);
+}
+
+void sclp_early_printk_force(const char *str)
+{
+	__sclp_early_printk(str, strlen(str), 1);
 }
-- 
2.17.1

[PATCH AUTOSEL 4.18 03/27] perf report: Don't try to map ip to invalid map

[Sasha Levin]

From: Milian Wolff <milian.wolff@kdab.com>

[ Upstream commit ff4ce2885af8f9e8e99864d78dbeb4673f089c76 ]

Fixes a crash when the report encounters an address that could not be
associated with an mmaped region:

  #0  0x00005555557bdc4a in callchain_srcline (ip=<error reading variable: Cannot access memory at address 0x38>, sym=0x0, map=0x0) at util/machine.c:2329
  #1  unwind_entry (entry=entry@entry=0x7fffffff9180, arg=arg@entry=0x7ffff5642498) at util/machine.c:2329
  #2  0x00005555558370af in entry (arg=0x7ffff5642498, cb=0x5555557bdb50 <unwind_entry>, thread=<optimized out>, ip=18446744073709551615) at util/unwind-libunwind-local.c:586
  #3  get_entries (ui=ui@entry=0x7fffffff9620, cb=0x5555557bdb50 <unwind_entry>, arg=0x7ffff5642498, max_stack=<optimized out>) at util/unwind-libunwind-local.c:703
  #4  0x0000555555837192 in _unwind__get_entries (cb=<optimized out>, arg=<optimized out>, thread=<optimized out>, data=<optimized out>, max_stack=<optimized out>) at util/unwind-libunwind-local.c:725
  #5  0x00005555557c310f in thread__resolve_callchain_unwind (max_stack=127, sample=0x7fffffff9830, evsel=0x555555c7b3b0, cursor=0x7ffff5642498, thread=0x555555c7f6f0) at util/machine.c:2351
  #6  thread__resolve_callchain (thread=0x555555c7f6f0, cursor=0x7ffff5642498, evsel=0x555555c7b3b0, sample=0x7fffffff9830, parent=0x7fffffff97b8, root_al=0x7fffffff9750, max_stack=127) at util/machine.c:2378
  #7  0x00005555557ba4ee in sample__resolve_callchain (sample=<optimized out>, cursor=<optimized out>, parent=parent@entry=0x7fffffff97b8, evsel=<optimized out>, al=al@entry=0x7fffffff9750,
      max_stack=<optimized out>) at util/callchain.c:1085

Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Tested-by: Sandipan Das <sandipan@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Fixes: 2a9d5050dc84 ("perf script: Show correct offsets for DWARF-based unwinding")
Link: http://lkml.kernel.org/r/20180926135207.30263-1-milian.wolff@kdab.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/perf/util/machine.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 22dbb6612b41..d49744dc46d7 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -2272,7 +2272,7 @@ static int unwind_entry(struct unwind_entry *entry, void *arg)
 {
 	struct callchain_cursor *cursor = arg;
 	const char *srcline = NULL;
-	u64 addr;
+	u64 addr = entry->ip;
 
 	if (symbol_conf.hide_unresolved && entry->sym == NULL)
 		return 0;
@@ -2284,7 +2284,8 @@ static int unwind_entry(struct unwind_entry *entry, void *arg)
 	 * Convert entry->ip from a virtual address to an offset in
 	 * its corresponding binary.
 	 */
-	addr = map__map_ip(entry->map, entry->ip);
+	if (entry->map)
+		addr = map__map_ip(entry->map, entry->ip);
 
 	srcline = callchain_srcline(entry->map, entry->sym, addr);
 	return callchain_cursor_append(cursor, entry->ip,
-- 
2.17.1

[PATCH AUTOSEL 4.18 04/27] Input: i8042 - enable keyboard wakeups by default when s2idle is used

[Sasha Levin]

From: Daniel Drake <drake@endlessm.com>

[ Upstream commit 684bec1092b6991ff2a7751e8a763898576eb5c2 ]

Previously, on typical consumer laptops, pressing a key on the keyboard
when the system is in suspend would cause it to wake up (default or
unconditional behaviour). This happens because the EC generates a SCI
interrupt in this scenario.

That is no longer true on modern laptops based on Intel WhiskeyLake,
including Acer Swift SF314-55G, Asus UX333FA, Asus UX433FN and Asus
UX533FD. We confirmed with Asus EC engineers that the "Modern Standby"
design has been modified so that the EC no longer generates a SCI
in this case; the keyboard controller itself should be used for wakeup.

In order to retain the standard behaviour of being able to use the
keyboard to wake up the system, enable serio wakeups by default on
platforms that are using s2idle.

Link: https://lkml.kernel.org/r/CAB4CAwfQ0mPMqCLp95TVjw4J0r5zKPWkSvvkK4cpZUGE--w8bQ@mail.gmail.com
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/input/serio/i8042.c | 29 ++++++++++++++++++++---------
 include/linux/suspend.h     |  2 ++
 kernel/power/suspend.c      |  6 ++++++
 3 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
index 824f4c1c1f31..6462f1798fbb 100644
--- a/drivers/input/serio/i8042.c
+++ b/drivers/input/serio/i8042.c
@@ -1392,15 +1392,26 @@ static void __init i8042_register_ports(void)
 	for (i = 0; i < I8042_NUM_PORTS; i++) {
 		struct serio *serio = i8042_ports[i].serio;
 
-		if (serio) {
-			printk(KERN_INFO "serio: %s at %#lx,%#lx irq %d\n",
-				serio->name,
-				(unsigned long) I8042_DATA_REG,
-				(unsigned long) I8042_COMMAND_REG,
-				i8042_ports[i].irq);
-			serio_register_port(serio);
-			device_set_wakeup_capable(&serio->dev, true);
-		}
+		if (!serio)
+			continue;
+
+		printk(KERN_INFO "serio: %s at %#lx,%#lx irq %d\n",
+			serio->name,
+			(unsigned long) I8042_DATA_REG,
+			(unsigned long) I8042_COMMAND_REG,
+			i8042_ports[i].irq);
+		serio_register_port(serio);
+		device_set_wakeup_capable(&serio->dev, true);
+
+		/*
+		 * On platforms using suspend-to-idle, allow the keyboard to
+		 * wake up the system from sleep by enabling keyboard wakeups
+		 * by default.  This is consistent with keyboard wakeup
+		 * behavior on many platforms using suspend-to-RAM (ACPI S3)
+		 * by default.
+		 */
+		if (pm_suspend_via_s2idle() && i == I8042_KBD_PORT_NO)
+			device_set_wakeup_enable(&serio->dev, true);
 	}
 }
 
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 440b62f7502e..206b735f383f 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -251,6 +251,7 @@ static inline bool idle_should_enter_s2idle(void)
 	return unlikely(s2idle_state == S2IDLE_STATE_ENTER);
 }
 
+extern bool pm_suspend_via_s2idle(void);
 extern void __init pm_states_init(void);
 extern void s2idle_set_ops(const struct platform_s2idle_ops *ops);
 extern void s2idle_wake(void);
@@ -282,6 +283,7 @@ static inline void pm_set_suspend_via_firmware(void) {}
 static inline void pm_set_resume_via_firmware(void) {}
 static inline bool pm_suspend_via_firmware(void) { return false; }
 static inline bool pm_resume_via_firmware(void) { return false; }
+static inline bool pm_suspend_via_s2idle(void) { return false; }
 
 static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {}
 static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 87331565e505..3eeafaff190a 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -63,6 +63,12 @@ static DECLARE_SWAIT_QUEUE_HEAD(s2idle_wait_head);
 enum s2idle_states __read_mostly s2idle_state;
 static DEFINE_RAW_SPINLOCK(s2idle_lock);
 
+bool pm_suspend_via_s2idle(void)
+{
+	return mem_sleep_current == PM_SUSPEND_TO_IDLE;
+}
+EXPORT_SYMBOL_GPL(pm_suspend_via_s2idle);
+
 void s2idle_set_ops(const struct platform_s2idle_ops *ops)
 {
 	lock_system_sleep();
-- 
2.17.1

Re: [PATCH AUTOSEL 4.18 04/27] Input: i8042 - enable keyboard wakeups by default when s2idle is used

[Dmitry Torokhov]

Hi Sasha,

On Mon, Oct 22, 2018 at 06:19:01AM -0400, Sasha Levin wrote:
> From: Daniel Drake <drake@endlessm.com>
> 
> [ Upstream commit 684bec1092b6991ff2a7751e8a763898576eb5c2 ]
> 
> Previously, on typical consumer laptops, pressing a key on the keyboard
> when the system is in suspend would cause it to wake up (default or
> unconditional behaviour). This happens because the EC generates a SCI
> interrupt in this scenario.
> 
> That is no longer true on modern laptops based on Intel WhiskeyLake,
> including Acer Swift SF314-55G, Asus UX333FA, Asus UX433FN and Asus
> UX533FD. We confirmed with Asus EC engineers that the "Modern Standby"
> design has been modified so that the EC no longer generates a SCI
> in this case; the keyboard controller itself should be used for wakeup.
> 
> In order to retain the standard behaviour of being able to use the
> keyboard to wake up the system, enable serio wakeups by default on
> platforms that are using s2idle.

I disagree that this should be included in stable as it does not fix a
regression on the aforementioned platforms and has a potential to alter
the behavior. The fact that the system does not wake up on keyboard is
not a showstopper, wakeup usually happens on lid open anyway.

It is hitting 4.19 LTS train and that should be enough. Please do not
pick up for earlier stables.

Thanks.

> 
> Link: https://lkml.kernel.org/r/CAB4CAwfQ0mPMqCLp95TVjw4J0r5zKPWkSvvkK4cpZUGE--w8bQ@mail.gmail.com
> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> Signed-off-by: Daniel Drake <drake@endlessm.com>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
>  drivers/input/serio/i8042.c | 29 ++++++++++++++++++++---------
>  include/linux/suspend.h     |  2 ++
>  kernel/power/suspend.c      |  6 ++++++
>  3 files changed, 28 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
> index 824f4c1c1f31..6462f1798fbb 100644
> --- a/drivers/input/serio/i8042.c
> +++ b/drivers/input/serio/i8042.c
> @@ -1392,15 +1392,26 @@ static void __init i8042_register_ports(void)
>  	for (i = 0; i < I8042_NUM_PORTS; i++) {
>  		struct serio *serio = i8042_ports[i].serio;
>  
> -		if (serio) {
> -			printk(KERN_INFO "serio: %s at %#lx,%#lx irq %d\n",
> -				serio->name,
> -				(unsigned long) I8042_DATA_REG,
> -				(unsigned long) I8042_COMMAND_REG,
> -				i8042_ports[i].irq);
> -			serio_register_port(serio);
> -			device_set_wakeup_capable(&serio->dev, true);
> -		}
> +		if (!serio)
> +			continue;
> +
> +		printk(KERN_INFO "serio: %s at %#lx,%#lx irq %d\n",
> +			serio->name,
> +			(unsigned long) I8042_DATA_REG,
> +			(unsigned long) I8042_COMMAND_REG,
> +			i8042_ports[i].irq);
> +		serio_register_port(serio);
> +		device_set_wakeup_capable(&serio->dev, true);
> +
> +		/*
> +		 * On platforms using suspend-to-idle, allow the keyboard to
> +		 * wake up the system from sleep by enabling keyboard wakeups
> +		 * by default.  This is consistent with keyboard wakeup
> +		 * behavior on many platforms using suspend-to-RAM (ACPI S3)
> +		 * by default.
> +		 */
> +		if (pm_suspend_via_s2idle() && i == I8042_KBD_PORT_NO)
> +			device_set_wakeup_enable(&serio->dev, true);
>  	}
>  }
>  
> diff --git a/include/linux/suspend.h b/include/linux/suspend.h
> index 440b62f7502e..206b735f383f 100644
> --- a/include/linux/suspend.h
> +++ b/include/linux/suspend.h
> @@ -251,6 +251,7 @@ static inline bool idle_should_enter_s2idle(void)
>  	return unlikely(s2idle_state == S2IDLE_STATE_ENTER);
>  }
>  
> +extern bool pm_suspend_via_s2idle(void);
>  extern void __init pm_states_init(void);
>  extern void s2idle_set_ops(const struct platform_s2idle_ops *ops);
>  extern void s2idle_wake(void);
> @@ -282,6 +283,7 @@ static inline void pm_set_suspend_via_firmware(void) {}
>  static inline void pm_set_resume_via_firmware(void) {}
>  static inline bool pm_suspend_via_firmware(void) { return false; }
>  static inline bool pm_resume_via_firmware(void) { return false; }
> +static inline bool pm_suspend_via_s2idle(void) { return false; }
>  
>  static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {}
>  static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
> diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
> index 87331565e505..3eeafaff190a 100644
> --- a/kernel/power/suspend.c
> +++ b/kernel/power/suspend.c
> @@ -63,6 +63,12 @@ static DECLARE_SWAIT_QUEUE_HEAD(s2idle_wait_head);
>  enum s2idle_states __read_mostly s2idle_state;
>  static DEFINE_RAW_SPINLOCK(s2idle_lock);
>  
> +bool pm_suspend_via_s2idle(void)
> +{
> +	return mem_sleep_current == PM_SUSPEND_TO_IDLE;
> +}
> +EXPORT_SYMBOL_GPL(pm_suspend_via_s2idle);
> +
>  void s2idle_set_ops(const struct platform_s2idle_ops *ops)
>  {
>  	lock_system_sleep();
> -- 
> 2.17.1
> 

-- 
Dmitry

Re: [PATCH AUTOSEL 4.18 04/27] Input: i8042 - enable keyboard wakeups by default when s2idle is used

[Sasha Levin]

On Mon, Oct 22, 2018 at 09:58:21AM -0700, Dmitry Torokhov wrote:
>Hi Sasha,
>
>On Mon, Oct 22, 2018 at 06:19:01AM -0400, Sasha Levin wrote:
>> From: Daniel Drake <drake@endlessm.com>
>>
>> [ Upstream commit 684bec1092b6991ff2a7751e8a763898576eb5c2 ]
>>
>> Previously, on typical consumer laptops, pressing a key on the keyboard
>> when the system is in suspend would cause it to wake up (default or
>> unconditional behaviour). This happens because the EC generates a SCI
>> interrupt in this scenario.
>>
>> That is no longer true on modern laptops based on Intel WhiskeyLake,
>> including Acer Swift SF314-55G, Asus UX333FA, Asus UX433FN and Asus
>> UX533FD. We confirmed with Asus EC engineers that the "Modern Standby"
>> design has been modified so that the EC no longer generates a SCI
>> in this case; the keyboard controller itself should be used for wakeup.
>>
>> In order to retain the standard behaviour of being able to use the
>> keyboard to wake up the system, enable serio wakeups by default on
>> platforms that are using s2idle.
>
>I disagree that this should be included in stable as it does not fix a
>regression on the aforementioned platforms and has a potential to alter
>the behavior. The fact that the system does not wake up on keyboard is
>not a showstopper, wakeup usually happens on lid open anyway.
>
>It is hitting 4.19 LTS train and that should be enough. Please do not
>pick up for earlier stables.

Dropped, thanks!

[PATCH AUTOSEL 4.18 05/27] Input: mousedev - add a schedule point in mousedev_write()

[Sasha Levin]

From: Eric Dumazet <edumazet@google.com>

[ Upstream commit f74c371fe72a4f820d287db8067683fb533e4ede ]

syzbot was able to trigger rcu stalls by calling write()
with large number of bytes.

Add a cond_resched() in the loop to avoid this.

Link: https://lkml.org/lkml/2018/8/23/1106
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot+9436b02171ac0894d33e@syzkaller.appspotmail.com
Reviewed-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/input/mousedev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/input/mousedev.c b/drivers/input/mousedev.c
index e08228061bcd..412fa71245af 100644
--- a/drivers/input/mousedev.c
+++ b/drivers/input/mousedev.c
@@ -707,6 +707,7 @@ static ssize_t mousedev_write(struct file *file, const char __user *buffer,
 		mousedev_generate_response(client, c);
 
 		spin_unlock_irq(&client->packet_lock);
+		cond_resched();
 	}
 
 	kill_fasync(&client->fasync, SIGIO, POLL_IN);
-- 
2.17.1

[PATCH AUTOSEL 4.18 06/27] perf python: Use -Wno-redundant-decls to build with PYTHON=python3

[Sasha Levin]

From: Arnaldo Carvalho de Melo <acme@redhat.com>

[ Upstream commit 05a2f54679861deb188750ba2a70187000b2c71f ]

When building in ClearLinux using 'make PYTHON=python3' with gcc 8.2.1
it fails with:

    GEN      /tmp/build/perf/python/perf.so
  In file included from /usr/include/python3.7m/Python.h:126,
                   from /git/linux/tools/perf/util/python.c:2:
  /usr/include/python3.7m/import.h:58:24: error: redundant redeclaration of ‘_PyImport_AddModuleObject’ [-Werror=redundant-decls]
   PyAPI_FUNC(PyObject *) _PyImport_AddModuleObject(PyObject *, PyObject *);
                          ^~~~~~~~~~~~~~~~~~~~~~~~~
  /usr/include/python3.7m/import.h:47:24: note: previous declaration of ‘_PyImport_AddModuleObject’ was here
   PyAPI_FUNC(PyObject *) _PyImport_AddModuleObject(PyObject *name,
                          ^~~~~~~~~~~~~~~~~~~~~~~~~
  cc1: all warnings being treated as errors
  error: command 'gcc' failed with exit status 1

And indeed there is a redundant declaration in that Python.h file, one
with parameter names and the other without, so just add
-Wno-error=redundant-decls to the python setup instructions.

Now perf builds with gcc in ClearLinux with the following Dockerfile:

  # docker.io/acmel/linux-perf-tools-build-clearlinux:latest
  FROM docker.io/clearlinux:latest
  MAINTAINER Arnaldo Carvalho de Melo <acme@kernel.org>
  RUN swupd update && \
      swupd bundle-add sysadmin-basic-dev
  RUN mkdir -m 777 -p /git /tmp/build/perf /tmp/build/objtool /tmp/build/linux && \
      groupadd -r perfbuilder && \
      useradd -m -r -g perfbuilder perfbuilder && \
      chown -R perfbuilder.perfbuilder /tmp/build/ /git/
  USER perfbuilder
  COPY rx_and_build.sh /
  ENV EXTRA_MAKE_ARGS=PYTHON=python3
  ENTRYPOINT ["/rx_and_build.sh"]

Now to figure out why the build fails with clang, that is present in the
above container as detected by the rx_and_build.sh script:

  clang version 6.0.1 (tags/RELEASE_601/final)
  Target: x86_64-unknown-linux-gnu
  Thread model: posix
  InstalledDir: /usr/sbin
  make: Entering directory '/git/linux/tools/perf'
    BUILD:   Doing 'make -j4' parallel build
    HOSTCC   /tmp/build/perf/fixdep.o
    HOSTLD   /tmp/build/perf/fixdep-in.o
    LINK     /tmp/build/perf/fixdep

  Auto-detecting system features:
  ...                         dwarf: [ OFF ]
  ...            dwarf_getlocations: [ OFF ]
  ...                         glibc: [ OFF ]
  ...                          gtk2: [ OFF ]
  ...                      libaudit: [ OFF ]
  ...                        libbfd: [ OFF ]
  ...                        libelf: [ OFF ]
  ...                       libnuma: [ OFF ]
  ...        numa_num_possible_cpus: [ OFF ]
  ...                       libperl: [ OFF ]
  ...                     libpython: [ OFF ]
  ...                      libslang: [ OFF ]
  ...                     libcrypto: [ OFF ]
  ...                     libunwind: [ OFF ]
  ...            libdw-dwarf-unwind: [ OFF ]
  ...                          zlib: [ OFF ]
  ...                          lzma: [ OFF ]
  ...                     get_cpuid: [ OFF ]
  ...                           bpf: [ OFF ]

  Makefile.config:331: *** No gnu/libc-version.h found, please install glibc-dev[el].  Stop.
  make[1]: *** [Makefile.perf:206: sub-make] Error 2
  make: *** [Makefile:70: all] Error 2
  make: Leaving directory '/git/linux/tools/perf'

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thiago Macieira <thiago.macieira@intel.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-c3khb9ac86s00qxzjrueomme@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/perf/util/setup.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/setup.py b/tools/perf/util/setup.py
index 001be4f9d3b9..a5f9e236cc71 100644
--- a/tools/perf/util/setup.py
+++ b/tools/perf/util/setup.py
@@ -27,7 +27,7 @@ class install_lib(_install_lib):
 
 cflags = getenv('CFLAGS', '').split()
 # switch off several checks (need to be at the end of cflags list)
-cflags += ['-fno-strict-aliasing', '-Wno-write-strings', '-Wno-unused-parameter' ]
+cflags += ['-fno-strict-aliasing', '-Wno-write-strings', '-Wno-unused-parameter', '-Wno-redundant-decls' ]
 if cc != "clang":
     cflags += ['-Wno-cast-function-type' ]
 
-- 
2.17.1

[PATCH AUTOSEL 4.18 07/27] perf record: Use unmapped IP for inline callchain cursors

[Sasha Levin]

From: Milian Wolff <milian.wolff@kdab.com>

[ Upstream commit 7a8a8fcf7b860e4b2d4edc787c844d41cad9dfcf ]

Only use the mapped IP to find inline frames, but keep using the
unmapped IP for the callchain cursor. This ensures we properly show the
unmapped IP when displaying a frame we received via the
dso__parse_addr_inlines API for a module which does not contain
sufficient debug symbols to show the srcline.

This is another follow-up to commit 19610184693c ("perf script: Show
virtual addresses instead of offsets").

Signed-off-by: Milian Wolff <milian.wolff@kdab.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Sandipan Das <sandipan@linux.ibm.com>
Fixes: 19610184693c ("perf script: Show virtual addresses instead of offsets")
Link: http://lkml.kernel.org/r/20180926135207.30263-2-milian.wolff@kdab.com
Link: http://lkml.kernel.org/r/20181002073949.3297-1-milian.wolff@kdab.com
[ Squashed a fix from Milian for a problem reported by Ravi, fixed up space damage ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/perf/util/machine.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index d49744dc46d7..b70cce40ca97 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -2246,7 +2246,8 @@ static int append_inlines(struct callchain_cursor *cursor,
 	if (!symbol_conf.inline_name || !map || !sym)
 		return ret;
 
-	addr = map__rip_2objdump(map, ip);
+	addr = map__map_ip(map, ip);
+	addr = map__rip_2objdump(map, addr);
 
 	inline_node = inlines__tree_find(&map->dso->inlined_nodes, addr);
 	if (!inline_node) {
-- 
2.17.1

[PATCH AUTOSEL 4.18 08/27] Input: evdev - add a schedule point in evdev_write()

[Sasha Levin]

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

[ Upstream commit 36d2582ff235b4e01ad64a734c877a52dc762d9c ]

Large writes to evdev interface may cause rcu stalls. Let's add
cond_resched() to the loop to avoid this.

Reviewed-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/input/evdev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index c81c79d01d93..718d5622267d 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -564,6 +564,7 @@ static ssize_t evdev_write(struct file *file, const char __user *buffer,
 
 		input_inject_event(&evdev->handle,
 				   event.type, event.code, event.value);
+		cond_resched();
 	}
 
  out:
-- 
2.17.1

Re: [PATCH AUTOSEL 4.18 08/27] Input: evdev - add a schedule point in evdev_write()

[Dmitry Torokhov]

Hi Sasha,

On Mon, Oct 22, 2018 at 06:19:05AM -0400, Sasha Levin wrote:
> From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> 
> [ Upstream commit 36d2582ff235b4e01ad64a734c877a52dc762d9c ]
> 
> Large writes to evdev interface may cause rcu stalls. Let's add
> cond_resched() to the loop to avoid this.

This is not needed in stable:

- the interfaces are not accessible for unprivileged users so there is
  no DOS concerns
- the issue can only happen on non-preemptible kernels
- the issue only showed up with synthetic test and not real life use
  cases
- this is not a regression

The same goes to similar patches to mousedev, joydev and uinput that you
autoselected.

Thanks.

> 
> Reviewed-by: Paul E. McKenney <paulmck@linux.ibm.com>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
>  drivers/input/evdev.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
> index c81c79d01d93..718d5622267d 100644
> --- a/drivers/input/evdev.c
> +++ b/drivers/input/evdev.c
> @@ -564,6 +564,7 @@ static ssize_t evdev_write(struct file *file, const char __user *buffer,
>  
>  		input_inject_event(&evdev->handle,
>  				   event.type, event.code, event.value);
> +		cond_resched();
>  	}
>  
>   out:
> -- 
> 2.17.1
> 

-- 
Dmitry

Re: [PATCH AUTOSEL 4.18 08/27] Input: evdev - add a schedule point in evdev_write()

[Sasha Levin]

On Mon, Oct 22, 2018 at 10:02:44AM -0700, Dmitry Torokhov wrote:
>Hi Sasha,
>
>On Mon, Oct 22, 2018 at 06:19:05AM -0400, Sasha Levin wrote:
>> From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
>>
>> [ Upstream commit 36d2582ff235b4e01ad64a734c877a52dc762d9c ]
>>
>> Large writes to evdev interface may cause rcu stalls. Let's add
>> cond_resched() to the loop to avoid this.
>
>This is not needed in stable:
>
>- the interfaces are not accessible for unprivileged users so there is
>  no DOS concerns
>- the issue can only happen on non-preemptible kernels
>- the issue only showed up with synthetic test and not real life use
>  cases
>- this is not a regression
>
>The same goes to similar patches to mousedev, joydev and uinput that you
>autoselected.

Dropped, thanks!

--
Thanks,
Sasha

[PATCH AUTOSEL 4.18 09/27] Input: uinput - add a schedule point in uinput_inject_events()

[Sasha Levin]

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

[ Upstream commit cecf10704899467a787975e3d94a1f0129b9688e ]

Large writes to uinput interface may cause rcu stalls. Let's add
cond_resched() to the loop to avoid this.

Reviewed-by: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/input/misc/uinput.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 96a887f33698..a7abab79a62f 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -598,6 +598,7 @@ static ssize_t uinput_inject_events(struct uinput_device *udev,
 
 		input_event(udev->dev, ev.type, ev.code, ev.value);
 		bytes += input_event_size();
+		cond_resched();
 	}
 
 	return bytes;
-- 
2.17.1

[PATCH AUTOSEL 4.18 10/27] rxrpc: Don't check RXRPC_CALL_TX_LAST after calling rxrpc_rotate_tx_window()

[Sasha Levin]

From: David Howells <dhowells@redhat.com>

[ Upstream commit c479d5f2c2e1ce609da08c075054440d97ddff52 ]

We should only call the function to end a call's Tx phase if we rotated the
marked-last packet out of the transmission buffer.

Make rxrpc_rotate_tx_window() return an indication of whether it just
rotated the packet marked as the last out of the transmit buffer, carrying
the information out of the locked section in that function.

We can then check the return value instead of examining RXRPC_CALL_TX_LAST.

Fixes: 70790dbe3f66 ("rxrpc: Pass the last Tx packet marker in the annotation buffer")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/rxrpc/input.c | 35 +++++++++++++++++++----------------
 1 file changed, 19 insertions(+), 16 deletions(-)

diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 608d078a4981..5e180a3c2d01 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -216,10 +216,11 @@ static void rxrpc_send_ping(struct rxrpc_call *call, struct sk_buff *skb,
 /*
  * Apply a hard ACK by advancing the Tx window.
  */
-static void rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
+static bool rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
 				   struct rxrpc_ack_summary *summary)
 {
 	struct sk_buff *skb, *list = NULL;
+	bool rot_last = false;
 	int ix;
 	u8 annotation;
 
@@ -243,15 +244,17 @@ static void rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
 		skb->next = list;
 		list = skb;
 
-		if (annotation & RXRPC_TX_ANNO_LAST)
+		if (annotation & RXRPC_TX_ANNO_LAST) {
 			set_bit(RXRPC_CALL_TX_LAST, &call->flags);
+			rot_last = true;
+		}
 		if ((annotation & RXRPC_TX_ANNO_MASK) != RXRPC_TX_ANNO_ACK)
 			summary->nr_rot_new_acks++;
 	}
 
 	spin_unlock(&call->lock);
 
-	trace_rxrpc_transmit(call, (test_bit(RXRPC_CALL_TX_LAST, &call->flags) ?
+	trace_rxrpc_transmit(call, (rot_last ?
 				    rxrpc_transmit_rotate_last :
 				    rxrpc_transmit_rotate));
 	wake_up(&call->waitq);
@@ -262,6 +265,8 @@ static void rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
 		skb->next = NULL;
 		rxrpc_free_skb(skb, rxrpc_skb_tx_freed);
 	}
+
+	return rot_last;
 }
 
 /*
@@ -332,11 +337,11 @@ static bool rxrpc_receiving_reply(struct rxrpc_call *call)
 		trace_rxrpc_timer(call, rxrpc_timer_init_for_reply, now);
 	}
 
-	if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags))
-		rxrpc_rotate_tx_window(call, top, &summary);
 	if (!test_bit(RXRPC_CALL_TX_LAST, &call->flags)) {
-		rxrpc_proto_abort("TXL", call, top);
-		return false;
+		if (!rxrpc_rotate_tx_window(call, top, &summary)) {
+			rxrpc_proto_abort("TXL", call, top);
+			return false;
+		}
 	}
 	if (!rxrpc_end_tx_phase(call, true, "ETD"))
 		return false;
@@ -890,8 +895,12 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
 	if (nr_acks > call->tx_top - hard_ack)
 		return rxrpc_proto_abort("AKN", call, 0);
 
-	if (after(hard_ack, call->tx_hard_ack))
-		rxrpc_rotate_tx_window(call, hard_ack, &summary);
+	if (after(hard_ack, call->tx_hard_ack)) {
+		if (rxrpc_rotate_tx_window(call, hard_ack, &summary)) {
+			rxrpc_end_tx_phase(call, false, "ETA");
+			return;
+		}
+	}
 
 	if (nr_acks > 0) {
 		if (skb_copy_bits(skb, offset, buf.acks, nr_acks) < 0)
@@ -900,11 +909,6 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
 				      &summary);
 	}
 
-	if (test_bit(RXRPC_CALL_TX_LAST, &call->flags)) {
-		rxrpc_end_tx_phase(call, false, "ETA");
-		return;
-	}
-
 	if (call->rxtx_annotations[call->tx_top & RXRPC_RXTX_BUFF_MASK] &
 	    RXRPC_TX_ANNO_LAST &&
 	    summary.nr_acks == call->tx_top - hard_ack &&
@@ -926,8 +930,7 @@ static void rxrpc_input_ackall(struct rxrpc_call *call, struct sk_buff *skb)
 
 	_proto("Rx ACKALL %%%u", sp->hdr.serial);
 
-	rxrpc_rotate_tx_window(call, call->tx_top, &summary);
-	if (test_bit(RXRPC_CALL_TX_LAST, &call->flags))
+	if (rxrpc_rotate_tx_window(call, call->tx_top, &summary))
 		rxrpc_end_tx_phase(call, false, "ETL");
 }
 
-- 
2.17.1

[PATCH AUTOSEL 4.18 11/27] rxrpc: Carry call state out of locked section in rxrpc_rotate_tx_window()

[Sasha Levin]

From: David Howells <dhowells@redhat.com>

[ Upstream commit dfe995224693798e554ab4770f6d8a096afc60cd ]

Carry the call state out of the locked section in rxrpc_rotate_tx_window()
rather than sampling it afterwards.  This is only used to select tracepoint
data, but could have changed by the time we do the tracepoint.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/rxrpc/input.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 5e180a3c2d01..fe1cf206d12a 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -278,23 +278,26 @@ static bool rxrpc_rotate_tx_window(struct rxrpc_call *call, rxrpc_seq_t to,
 static bool rxrpc_end_tx_phase(struct rxrpc_call *call, bool reply_begun,
 			       const char *abort_why)
 {
+	unsigned int state;
 
 	ASSERT(test_bit(RXRPC_CALL_TX_LAST, &call->flags));
 
 	write_lock(&call->state_lock);
 
-	switch (call->state) {
+	state = call->state;
+	switch (state) {
 	case RXRPC_CALL_CLIENT_SEND_REQUEST:
 	case RXRPC_CALL_CLIENT_AWAIT_REPLY:
 		if (reply_begun)
-			call->state = RXRPC_CALL_CLIENT_RECV_REPLY;
+			call->state = state = RXRPC_CALL_CLIENT_RECV_REPLY;
 		else
-			call->state = RXRPC_CALL_CLIENT_AWAIT_REPLY;
+			call->state = state = RXRPC_CALL_CLIENT_AWAIT_REPLY;
 		break;
 
 	case RXRPC_CALL_SERVER_AWAIT_ACK:
 		__rxrpc_call_completed(call);
 		rxrpc_notify_socket(call);
+		state = call->state;
 		break;
 
 	default:
@@ -302,11 +305,10 @@ static bool rxrpc_end_tx_phase(struct rxrpc_call *call, bool reply_begun,
 	}
 
 	write_unlock(&call->state_lock);
-	if (call->state == RXRPC_CALL_CLIENT_AWAIT_REPLY) {
+	if (state == RXRPC_CALL_CLIENT_AWAIT_REPLY)
 		trace_rxrpc_transmit(call, rxrpc_transmit_await_reply);
-	} else {
+	else
 		trace_rxrpc_transmit(call, rxrpc_transmit_end);
-	}
 	_leave(" = ok");
 	return true;
 
-- 
2.17.1

[PATCH AUTOSEL 4.18 12/27] rxrpc: Only take the rwind and mtu values from latest ACK

[Sasha Levin]

From: David Howells <dhowells@redhat.com>

[ Upstream commit 298bc15b2079c324e82d0a6fda39c3d762af7282 ]

Move the out-of-order and duplicate ACK packet check to before the call to
rxrpc_input_ackinfo() so that the receive window size and MTU size are only
checked in the latest ACK packet and don't regress.

Fixes: 248f219cb8bc ("rxrpc: Rewrite the data and ack handling code")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/rxrpc/input.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index fe1cf206d12a..b768b170f0e7 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -861,6 +861,16 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
 				  rxrpc_propose_ack_respond_to_ack);
 	}
 
+	/* Discard any out-of-order or duplicate ACKs. */
+	if (before_eq(sp->hdr.serial, call->acks_latest)) {
+		_debug("discard ACK %d <= %d",
+		       sp->hdr.serial, call->acks_latest);
+		return;
+	}
+	call->acks_latest_ts = skb->tstamp;
+	call->acks_latest = sp->hdr.serial;
+
+	/* Parse rwind and mtu sizes if provided. */
 	ioffset = offset + nr_acks + 3;
 	if (skb->len >= ioffset + sizeof(buf.info)) {
 		if (skb_copy_bits(skb, ioffset, &buf.info, sizeof(buf.info)) < 0)
@@ -882,15 +892,6 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb,
 		return;
 	}
 
-	/* Discard any out-of-order or duplicate ACKs. */
-	if (before_eq(sp->hdr.serial, call->acks_latest)) {
-		_debug("discard ACK %d <= %d",
-		       sp->hdr.serial, call->acks_latest);
-		return;
-	}
-	call->acks_latest_ts = skb->tstamp;
-	call->acks_latest = sp->hdr.serial;
-
 	if (before(hard_ack, call->tx_hard_ack) ||
 	    after(hard_ack, call->tx_top))
 		return rxrpc_proto_abort("AKW", call, 0);
-- 
2.17.1

[PATCH AUTOSEL 4.18 13/27] rxrpc: Fix connection-level abort handling

[Sasha Levin]

From: David Howells <dhowells@redhat.com>

[ Upstream commit 647530924f47c93db472ee3cf43b7ef1425581b6 ]

Fix connection-level abort handling to cache the abort and error codes
properly so that a new incoming call can be properly aborted if it races
with the parent connection being aborted by another CPU.

The abort_code and error parameters can then be dropped from
rxrpc_abort_calls().

Fixes: f5c17aaeb2ae ("rxrpc: Calls should only have one terminal state")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/rxrpc/ar-internal.h |  4 ++--
 net/rxrpc/call_accept.c |  4 ++--
 net/rxrpc/conn_event.c  | 26 +++++++++++++++-----------
 3 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 707630ab4713..599d6c4e9444 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -449,8 +449,7 @@ struct rxrpc_connection {
 	spinlock_t		state_lock;	/* state-change lock */
 	enum rxrpc_conn_cache_state cache_state;
 	enum rxrpc_conn_proto_state state;	/* current state of connection */
-	u32			local_abort;	/* local abort code */
-	u32			remote_abort;	/* remote abort code */
+	u32			abort_code;	/* Abort code of connection abort */
 	int			debug_id;	/* debug ID for printks */
 	atomic_t		serial;		/* packet serial number counter */
 	unsigned int		hi_serial;	/* highest serial number received */
@@ -460,6 +459,7 @@ struct rxrpc_connection {
 	u8			security_size;	/* security header size */
 	u8			security_ix;	/* security type */
 	u8			out_clientflag;	/* RXRPC_CLIENT_INITIATED if we are client */
+	short			error;		/* Local error code */
 };
 
 /*
diff --git a/net/rxrpc/call_accept.c b/net/rxrpc/call_accept.c
index 9d1e298b784c..0e378d73e856 100644
--- a/net/rxrpc/call_accept.c
+++ b/net/rxrpc/call_accept.c
@@ -422,11 +422,11 @@ struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *local,
 
 	case RXRPC_CONN_REMOTELY_ABORTED:
 		rxrpc_set_call_completion(call, RXRPC_CALL_REMOTELY_ABORTED,
-					  conn->remote_abort, -ECONNABORTED);
+					  conn->abort_code, conn->error);
 		break;
 	case RXRPC_CONN_LOCALLY_ABORTED:
 		rxrpc_abort_call("CON", call, sp->hdr.seq,
-				 conn->local_abort, -ECONNABORTED);
+				 conn->abort_code, conn->error);
 		break;
 	default:
 		BUG();
diff --git a/net/rxrpc/conn_event.c b/net/rxrpc/conn_event.c
index 3fde001fcc39..5e7c8239e703 100644
--- a/net/rxrpc/conn_event.c
+++ b/net/rxrpc/conn_event.c
@@ -126,7 +126,7 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
 
 	switch (chan->last_type) {
 	case RXRPC_PACKET_TYPE_ABORT:
-		_proto("Tx ABORT %%%u { %d } [re]", serial, conn->local_abort);
+		_proto("Tx ABORT %%%u { %d } [re]", serial, conn->abort_code);
 		break;
 	case RXRPC_PACKET_TYPE_ACK:
 		trace_rxrpc_tx_ack(NULL, serial, chan->last_seq, 0,
@@ -148,13 +148,12 @@ static void rxrpc_conn_retransmit_call(struct rxrpc_connection *conn,
  * pass a connection-level abort onto all calls on that connection
  */
 static void rxrpc_abort_calls(struct rxrpc_connection *conn,
-			      enum rxrpc_call_completion compl,
-			      u32 abort_code, int error)
+			      enum rxrpc_call_completion compl)
 {
 	struct rxrpc_call *call;
 	int i;
 
-	_enter("{%d},%x", conn->debug_id, abort_code);
+	_enter("{%d},%x", conn->debug_id, conn->abort_code);
 
 	spin_lock(&conn->channel_lock);
 
@@ -167,9 +166,11 @@ static void rxrpc_abort_calls(struct rxrpc_connection *conn,
 				trace_rxrpc_abort(call->debug_id,
 						  "CON", call->cid,
 						  call->call_id, 0,
-						  abort_code, error);
+						  conn->abort_code,
+						  conn->error);
 			if (rxrpc_set_call_completion(call, compl,
-						      abort_code, error))
+						      conn->abort_code,
+						      conn->error))
 				rxrpc_notify_socket(call);
 		}
 	}
@@ -202,10 +203,12 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn,
 		return 0;
 	}
 
+	conn->error = error;
+	conn->abort_code = abort_code;
 	conn->state = RXRPC_CONN_LOCALLY_ABORTED;
 	spin_unlock_bh(&conn->state_lock);
 
-	rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED, abort_code, error);
+	rxrpc_abort_calls(conn, RXRPC_CALL_LOCALLY_ABORTED);
 
 	msg.msg_name	= &conn->params.peer->srx.transport;
 	msg.msg_namelen	= conn->params.peer->srx.transport_len;
@@ -224,7 +227,7 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn,
 	whdr._rsvd	= 0;
 	whdr.serviceId	= htons(conn->service_id);
 
-	word		= htonl(conn->local_abort);
+	word		= htonl(conn->abort_code);
 
 	iov[0].iov_base	= &whdr;
 	iov[0].iov_len	= sizeof(whdr);
@@ -235,7 +238,7 @@ static int rxrpc_abort_connection(struct rxrpc_connection *conn,
 
 	serial = atomic_inc_return(&conn->serial);
 	whdr.serial = htonl(serial);
-	_proto("Tx CONN ABORT %%%u { %d }", serial, conn->local_abort);
+	_proto("Tx CONN ABORT %%%u { %d }", serial, conn->abort_code);
 
 	ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 2, len);
 	if (ret < 0) {
@@ -308,9 +311,10 @@ static int rxrpc_process_event(struct rxrpc_connection *conn,
 		abort_code = ntohl(wtmp);
 		_proto("Rx ABORT %%%u { ac=%d }", sp->hdr.serial, abort_code);
 
+		conn->error = -ECONNABORTED;
+		conn->abort_code = abort_code;
 		conn->state = RXRPC_CONN_REMOTELY_ABORTED;
-		rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED,
-				  abort_code, -ECONNABORTED);
+		rxrpc_abort_calls(conn, RXRPC_CALL_REMOTELY_ABORTED);
 		return -ECONNABORTED;
 
 	case RXRPC_PACKET_TYPE_CHALLENGE:
-- 
2.17.1

[PATCH AUTOSEL 4.18 14/27] KVM: x86: support CONFIG_KVM_AMD=y with CONFIG_CRYPTO_DEV_CCP_DD=m

[Sasha Levin]

From: Paolo Bonzini <pbonzini@redhat.com>

[ Upstream commit 853c110982eaff0d99dace3f66f1ba58b5bfd9d5 ]

SEV requires access to the AMD cryptographic device APIs, and this
does not work when KVM is builtin and the crypto driver is a module.
Actually the Kconfig conditions for CONFIG_KVM_AMD_SEV try to disable
SEV in that case, but it does not work because the actual crypto
calls are not culled, only sev_hardware_setup() is.

This patch adds two CONFIG_KVM_AMD_SEV checks that gate all the remaining
SEV code; it fixes this particular configuration, and drops 5 KiB of
code when CONFIG_KVM_AMD_SEV=n.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/x86/kvm/svm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index ef772e5634d4..3e59a187fe30 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -436,14 +436,18 @@ static inline struct kvm_svm *to_kvm_svm(struct kvm *kvm)
 
 static inline bool svm_sev_enabled(void)
 {
-	return max_sev_asid;
+	return IS_ENABLED(CONFIG_KVM_AMD_SEV) ? max_sev_asid : 0;
 }
 
 static inline bool sev_guest(struct kvm *kvm)
 {
+#ifdef CONFIG_KVM_AMD_SEV
 	struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
 
 	return sev->active;
+#else
+	return false;
+#endif
 }
 
 static inline int sev_get_asid(struct kvm *kvm)
-- 
2.17.1

[PATCH AUTOSEL 4.18 15/27] net: ena: fix warning in rmmod caused by double iounmap

[Sasha Levin]

From: Arthur Kiyanovski <akiyano@amazon.com>

[ Upstream commit d79c3888bde6581da7ff9f9d6f581900ecb5e632 ]

Memory mapped with devm_ioremap is automatically freed when the driver
is disconnected from the device. Therefore there is no need to
explicitly call devm_iounmap.

Fixes: 0857d92f71b6 ("net: ena: add missing unmap bars on device removal")
Fixes: 411838e7b41c ("net: ena: fix rare kernel crash when bar memory remap fails")
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 1b01cd2820ba..7093b661c50e 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -3128,15 +3128,8 @@ static int ena_rss_init_default(struct ena_adapter *adapter)
 
 static void ena_release_bars(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
 {
-	int release_bars;
+	int release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
 
-	if (ena_dev->mem_bar)
-		devm_iounmap(&pdev->dev, ena_dev->mem_bar);
-
-	if (ena_dev->reg_bar)
-		devm_iounmap(&pdev->dev, ena_dev->reg_bar);
-
-	release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
 	pci_release_selected_regions(pdev, release_bars);
 }
 
-- 
2.17.1

[PATCH AUTOSEL 4.18 16/27] net: ena: fix rare bug when failed restart/resume is followed by driver removal

[Sasha Levin]

From: Arthur Kiyanovski <akiyano@amazon.com>

[ Upstream commit d7703ddbd7c9cb1ab7c08e1b85b314ff8cea38e9 ]

In a rare scenario when ena_device_restore() fails, followed by device
remove, an FLR will not be issued. In this case, the device will keep
sending asynchronous AENQ keep-alive events, even after driver removal,
leading to memory corruption.

Fixes: 8c5c7abdeb2d ("net: ena: add power management ops to the ENA driver")
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 7093b661c50e..72dbdebf4b5d 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -2648,7 +2648,11 @@ static int ena_restore_device(struct ena_adapter *adapter)
 	ena_free_mgmnt_irq(adapter);
 	ena_disable_msix(adapter);
 err_device_destroy:
+	ena_com_abort_admin_commands(ena_dev);
+	ena_com_wait_for_abort_completion(ena_dev);
 	ena_com_admin_destroy(ena_dev);
+	ena_com_mmio_reg_read_request_destroy(ena_dev);
+	ena_com_dev_reset(ena_dev, ENA_REGS_RESET_DRIVER_INVALID_STATE);
 err:
 	clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
 	clear_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags);
-- 
2.17.1

[PATCH AUTOSEL 4.18 17/27] net: ena: fix NULL dereference due to untimely napi initialization

[Sasha Levin]

From: Arthur Kiyanovski <akiyano@amazon.com>

[ Upstream commit 78a55d05def95144ca5fa9a64c49b2a0636a9866 ]

napi poll functions should be initialized before running request_irq(),
to handle a rare condition where there is a pending interrupt, causing
the ISR to fire immediately while the poll function wasn't set yet,
causing a NULL dereference.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 72dbdebf4b5d..000f0d42a710 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -1580,8 +1580,6 @@ static int ena_up_complete(struct ena_adapter *adapter)
 	if (rc)
 		return rc;
 
-	ena_init_napi(adapter);
-
 	ena_change_mtu(adapter->netdev, adapter->netdev->mtu);
 
 	ena_refill_all_rx_bufs(adapter);
@@ -1735,6 +1733,13 @@ static int ena_up(struct ena_adapter *adapter)
 
 	ena_setup_io_intr(adapter);
 
+	/* napi poll functions should be initialized before running
+	 * request_irq(), to handle a rare condition where there is a pending
+	 * interrupt, causing the ISR to fire immediately while the poll
+	 * function wasn't set yet, causing a null dereference
+	 */
+	ena_init_napi(adapter);
+
 	rc = ena_request_io_irq(adapter);
 	if (rc)
 		goto err_req_irq;
-- 
2.17.1

[PATCH AUTOSEL 4.18 18/27] libertas: call into generic suspend code before turning off power

[Sasha Levin]

From: Daniel Mack <daniel@zonque.org>

[ Upstream commit 4f666675cdff0b986195413215eb062b7da6586f ]

When powering down a SDIO connected card during suspend, make sure to call
into the generic lbs_suspend() function before pulling the plug. This will
make sure the card is successfully deregistered from the system to avoid
communication to the card starving out.

Fixes: 7444a8092906 ("libertas: fix suspend and resume for SDIO connected cards")
Signed-off-by: Daniel Mack <daniel@zonque.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/wireless/marvell/libertas/if_sdio.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/marvell/libertas/if_sdio.c b/drivers/net/wireless/marvell/libertas/if_sdio.c
index 43743c26c071..39bf85d0ade0 100644
--- a/drivers/net/wireless/marvell/libertas/if_sdio.c
+++ b/drivers/net/wireless/marvell/libertas/if_sdio.c
@@ -1317,6 +1317,10 @@ static int if_sdio_suspend(struct device *dev)
 	if (priv->wol_criteria == EHS_REMOVE_WAKEUP) {
 		dev_info(dev, "Suspend without wake params -- powering down card\n");
 		if (priv->fw_ready) {
+			ret = lbs_suspend(priv);
+			if (ret)
+				return ret;
+
 			priv->power_up_on_resume = true;
 			if_sdio_power_off(card);
 		}
-- 
2.17.1

[PATCH AUTOSEL 4.18 19/27] gpio: Assign gpio_irq_chip::parents to non-stack pointer

[Sasha Levin]

From: Stephen Boyd <swboyd@chromium.org>

[ Upstream commit 3e779a2e7f909015f21428b66834127496110b6d ]

gpiochip_set_cascaded_irqchip() is passed 'parent_irq' as an argument
and then the address of that argument is assigned to the gpio chips
gpio_irq_chip 'parents' pointer shortly thereafter. This can't ever
work, because we've just assigned some stack address to a pointer that
we plan to dereference later in gpiochip_irq_map(). I ran into this
issue with the KASAN report below when gpiochip_irq_map() tried to setup
the parent irq with a total junk pointer for the 'parents' array.

BUG: KASAN: stack-out-of-bounds in gpiochip_irq_map+0x228/0x248
Read of size 4 at addr ffffffc0dde472e0 by task swapper/0/1

CPU: 7 PID: 1 Comm: swapper/0 Not tainted 4.14.72 #34
Call trace:
[<ffffff9008093638>] dump_backtrace+0x0/0x718
[<ffffff9008093da4>] show_stack+0x20/0x2c
[<ffffff90096b9224>] __dump_stack+0x20/0x28
[<ffffff90096b91c8>] dump_stack+0x80/0xbc
[<ffffff900845a350>] print_address_description+0x70/0x238
[<ffffff900845a8e4>] kasan_report+0x1cc/0x260
[<ffffff900845aa14>] __asan_report_load4_noabort+0x2c/0x38
[<ffffff900897e098>] gpiochip_irq_map+0x228/0x248
[<ffffff900820cc08>] irq_domain_associate+0x114/0x2ec
[<ffffff900820d13c>] irq_create_mapping+0x120/0x234
[<ffffff900820da78>] irq_create_fwspec_mapping+0x4c8/0x88c
[<ffffff900820e2d8>] irq_create_of_mapping+0x180/0x210
[<ffffff900917114c>] of_irq_get+0x138/0x198
[<ffffff9008dc70ac>] spi_drv_probe+0x94/0x178
[<ffffff9008ca5168>] driver_probe_device+0x51c/0x824
[<ffffff9008ca6538>] __device_attach_driver+0x148/0x20c
[<ffffff9008ca14cc>] bus_for_each_drv+0x120/0x188
[<ffffff9008ca570c>] __device_attach+0x19c/0x2dc
[<ffffff9008ca586c>] device_initial_probe+0x20/0x2c
[<ffffff9008ca18bc>] bus_probe_device+0x80/0x154
[<ffffff9008c9b9b4>] device_add+0x9b8/0xbdc
[<ffffff9008dc7640>] spi_add_device+0x1b8/0x380
[<ffffff9008dcbaf0>] spi_register_controller+0x111c/0x1378
[<ffffff9008dd6b10>] spi_geni_probe+0x4dc/0x6f8
[<ffffff9008cab058>] platform_drv_probe+0xdc/0x130
[<ffffff9008ca5168>] driver_probe_device+0x51c/0x824
[<ffffff9008ca59cc>] __driver_attach+0x100/0x194
[<ffffff9008ca0ea8>] bus_for_each_dev+0x104/0x16c
[<ffffff9008ca58c0>] driver_attach+0x48/0x54
[<ffffff9008ca1edc>] bus_add_driver+0x274/0x498
[<ffffff9008ca8448>] driver_register+0x1ac/0x230
[<ffffff9008caaf6c>] __platform_driver_register+0xcc/0xdc
[<ffffff9009c4b33c>] spi_geni_driver_init+0x1c/0x24
[<ffffff9008084cb8>] do_one_initcall+0x240/0x3dc
[<ffffff9009c017d0>] kernel_init_freeable+0x378/0x468
[<ffffff90096e8240>] kernel_init+0x14/0x110
[<ffffff9008086fcc>] ret_from_fork+0x10/0x18

The buggy address belongs to the page:
page:ffffffbf037791c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x4000000000000000()
raw: 4000000000000000 0000000000000000 0000000000000000 00000000ffffffff
raw: ffffffbf037791e0 ffffffbf037791e0 0000000000000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffffffc0dde47180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffc0dde47200: f1 f1 f1 f1 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f2 f2
>ffffffc0dde47280: f2 f2 00 00 00 00 00 00 00 00 00 00 f3 f3 f3 f3
                                                       ^
 ffffffc0dde47300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffc0dde47380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Let's leave around one unsigned int in the gpio_irq_chip struct for the
single parent irq case and repoint the 'parents' array at it. This way
code is left mostly intact to setup parents and we waste an extra few
bytes per structure of which there should be only a handful in a system.

Cc: Evan Green <evgreen@chromium.org>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Fixes: e0d897289813 ("gpio: Implement tighter IRQ chip integration")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpio/gpiolib.c      | 3 ++-
 include/linux/gpio/driver.h | 7 +++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 06dce16e22bb..70f0dedca59f 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1675,7 +1675,8 @@ static void gpiochip_set_cascaded_irqchip(struct gpio_chip *gpiochip,
 		irq_set_chained_handler_and_data(parent_irq, parent_handler,
 						 gpiochip);
 
-		gpiochip->irq.parents = &parent_irq;
+		gpiochip->irq.parent_irq = parent_irq;
+		gpiochip->irq.parents = &gpiochip->irq.parent_irq;
 		gpiochip->irq.num_parents = 1;
 	}
 
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 5382b5183b7e..82a953ec5ef0 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -94,6 +94,13 @@ struct gpio_irq_chip {
 	 */
 	unsigned int num_parents;
 
+	/**
+	 * @parent_irq:
+	 *
+	 * For use by gpiochip_set_cascaded_irqchip()
+	 */
+	unsigned int parent_irq;
+
 	/**
 	 * @parents:
 	 *
-- 
2.17.1

[PATCH AUTOSEL 4.18 20/27] IB/mlx5: Unmap DMA addr from HCA before IOMMU

[Sasha Levin]

From: Valentine Fatiev <Valentinef@mellanox.com>

[ Upstream commit dd9a403495704fc80fb9f399003013ef2be2ee23 ]

The function that puts back the MR in cache also removes the DMA address
from the HCA. Therefore we need to call this function before we remove
the DMA mapping from MMU. Otherwise the HCA may access a memory that
is no longer DMA mapped.

Call trace:
NMI: IOCK error (debug interrupt?) for reason 71 on CPU 0.
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.0-rc6+ #4
Hardware name: HP ProLiant DL360p Gen8, BIOS P71 08/20/2012
RIP: 0010:intel_idle+0x73/0x120
Code: 80 5c 01 00 0f ae 38 0f ae f0 31 d2 65 48 8b 04 25 80 5c 01 00 48 89 d1 0f 60 02
RSP: 0018:ffffffff9a403e38 EFLAGS: 00000046
RAX: 0000000000000030 RBX: 0000000000000005 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff9a5790c0 RDI: 0000000000000000
RBP: 0000000000000030 R08: 0000000000000000 R09: 0000000000007cf9
R10: 000000000000030a R11: 0000000000000018 R12: 0000000000000000
R13: ffffffff9a5792b8 R14: ffffffff9a5790c0 R15: 0000002b48471e4d
FS:  0000000000000000(0000) GS:ffff9c6caf400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5737185000 CR3: 0000000590c0a002 CR4: 00000000000606f0
Call Trace:
 cpuidle_enter_state+0x7e/0x2e0
 do_idle+0x1ed/0x290
 cpu_startup_entry+0x6f/0x80
 start_kernel+0x524/0x544
 ? set_init_arg+0x55/0x55
 secondary_startup_64+0xa4/0xb0
DMAR: DRHD: handling fault status reg 2
DMAR: [DMA Read] Request device [04:00.0] fault addr b34d2000 [fault reason 06] PTE Read access is not set
DMAR: [DMA Read] Request device [01:00.2] fault addr bff8b000 [fault reason 06] PTE Read access is not set

Fixes: f3f134f5260a ("RDMA/mlx5: Fix crash while accessing garbage pointer and freed memory")
Signed-off-by: Valentine Fatiev <valentinef@mellanox.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/infiniband/hw/mlx5/mr.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index 308456d28afb..73339fd47dd8 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -544,6 +544,9 @@ void mlx5_mr_cache_free(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
 	int shrink = 0;
 	int c;
 
+	if (!mr->allocated_from_cache)
+		return;
+
 	c = order2idx(dev, mr->order);
 	if (c < 0 || c >= MAX_MR_CACHE_ENTRIES) {
 		mlx5_ib_warn(dev, "order %d, cache index %d\n", mr->order, c);
@@ -1647,18 +1650,19 @@ static void dereg_mr(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr)
 		umem = NULL;
 	}
 #endif
-
 	clean_mr(dev, mr);
 
+	/*
+	 * We should unregister the DMA address from the HCA before
+	 * remove the DMA mapping.
+	 */
+	mlx5_mr_cache_free(dev, mr);
 	if (umem) {
 		ib_umem_release(umem);
 		atomic_sub(npages, &dev->mdev->priv.reg_pages);
 	}
-
 	if (!mr->allocated_from_cache)
 		kfree(mr);
-	else
-		mlx5_mr_cache_free(dev, mr);
 }
 
 int mlx5_ib_dereg_mr(struct ib_mr *ibmr)
-- 
2.17.1

[PATCH AUTOSEL 4.18 21/27] rds: RDS (tcp) hangs on sendto() to unresponding address

[Sasha Levin]

From: Ka-Cheong Poon <ka-cheong.poon@oracle.com>

[ Upstream commit 9a4890bd6d6325a1c88564a20ab310b2d56f6094 ]

In rds_send_mprds_hash(), if the calculated hash value is non-zero and
the MPRDS connections are not yet up, it will wait.  But it should not
wait if the send is non-blocking.  In this case, it should just use the
base c_path for sending the message.

Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/rds/send.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/net/rds/send.c b/net/rds/send.c
index 59f17a2335f4..0e54ca0f4e9e 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -1006,7 +1006,8 @@ static int rds_cmsg_send(struct rds_sock *rs, struct rds_message *rm,
 	return ret;
 }
 
-static int rds_send_mprds_hash(struct rds_sock *rs, struct rds_connection *conn)
+static int rds_send_mprds_hash(struct rds_sock *rs,
+			       struct rds_connection *conn, int nonblock)
 {
 	int hash;
 
@@ -1022,10 +1023,16 @@ static int rds_send_mprds_hash(struct rds_sock *rs, struct rds_connection *conn)
 		 * used.  But if we are interrupted, we have to use the zero
 		 * c_path in case the connection ends up being non-MP capable.
 		 */
-		if (conn->c_npaths == 0)
+		if (conn->c_npaths == 0) {
+			/* Cannot wait for the connection be made, so just use
+			 * the base c_path.
+			 */
+			if (nonblock)
+				return 0;
 			if (wait_event_interruptible(conn->c_hs_waitq,
 						     conn->c_npaths != 0))
 				hash = 0;
+		}
 		if (conn->c_npaths == 1)
 			hash = 0;
 	}
@@ -1170,7 +1177,7 @@ int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len)
 	}
 
 	if (conn->c_trans->t_mp_capable)
-		cpath = &conn->c_path[rds_send_mprds_hash(rs, conn)];
+		cpath = &conn->c_path[rds_send_mprds_hash(rs, conn, nonblock)];
 	else
 		cpath = &conn->c_path[0];
 
-- 
2.17.1

[PATCH AUTOSEL 4.18 22/27] selftests: rtnetlink.sh explicitly requires bash.

[Sasha Levin]

From: Paolo Abeni <pabeni@redhat.com>

[ Upstream commit 3c718e677c2b35b449992adc36ecce883c467e98 ]

the script rtnetlink.sh requires a bash-only features (sleep with sub-second
precision). This may cause random test failure if the default shell is not
bash.
Address the above explicitly requiring bash as the script interpreter.

Fixes: 33b01b7b4f19 ("selftests: add rtnetlink test script")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/testing/selftests/net/rtnetlink.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/rtnetlink.sh b/tools/testing/selftests/net/rtnetlink.sh
index 0d7a44fa30af..8e509cbcb209 100755
--- a/tools/testing/selftests/net/rtnetlink.sh
+++ b/tools/testing/selftests/net/rtnetlink.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # This test is for checking rtnetlink callpaths, and get as much coverage as possible.
 #
-- 
2.17.1

[PATCH AUTOSEL 4.18 23/27] selftests: udpgso_bench.sh explicitly requires bash

[Sasha Levin]

From: Paolo Abeni <pabeni@redhat.com>

[ Upstream commit 12a2ea962c06efb30764c47b140d2ec9d3cd7cb0 ]

The udpgso_bench.sh script requires several bash-only features. This
may cause random failures if the default shell is not bash.
Address the above explicitly requiring bash as the script interpreter

Fixes: 3a687bef148d ("selftests: udp gso benchmark")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/testing/selftests/net/udpgso_bench.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/udpgso_bench.sh b/tools/testing/selftests/net/udpgso_bench.sh
index 850767befa47..99e537ab5ad9 100755
--- a/tools/testing/selftests/net/udpgso_bench.sh
+++ b/tools/testing/selftests/net/udpgso_bench.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
 #
 # Run a series of udpgso benchmarks
-- 
2.17.1

[PATCH AUTOSEL 4.18 24/27] vmlinux.lds.h: Fix incomplete .text.exit discards

[Sasha Levin]

From: Peter Oberparleiter <oberpar@linux.ibm.com>

[ Upstream commit 8dcf86caa1e3daf4a6ccf38e97f4f752b411f829 ]

Enabling CONFIG_GCOV_PROFILE_ALL=y causes linker errors on ARM:

  `.text.exit' referenced in section `.ARM.exidx.text.exit':
  defined in discarded section `.text.exit'

  `.text.exit' referenced in section `.fini_array.00100':
  defined in discarded section `.text.exit'

And related errors on NDS32:

  `.text.exit' referenced in section `.dtors.65435':
  defined in discarded section `.text.exit'

The gcov compiler flags cause certain compiler versions to generate
additional destructor-related sections that are not yet handled by the
linker script, resulting in references between discarded and
non-discarded sections.

Since destructors are not used in the Linux kernel, fix this by
discarding these additional sections.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Greentime Hu <green.hu@gmail.com>
Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/arm/kernel/vmlinux.lds.h     | 2 ++
 include/asm-generic/vmlinux.lds.h | 4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm/kernel/vmlinux.lds.h b/arch/arm/kernel/vmlinux.lds.h
index ae5fdff18406..8247bc15addc 100644
--- a/arch/arm/kernel/vmlinux.lds.h
+++ b/arch/arm/kernel/vmlinux.lds.h
@@ -49,6 +49,8 @@
 #define ARM_DISCARD							\
 		*(.ARM.exidx.exit.text)					\
 		*(.ARM.extab.exit.text)					\
+		*(.ARM.exidx.text.exit)					\
+		*(.ARM.extab.text.exit)					\
 		ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))		\
 		ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))		\
 		ARM_EXIT_DISCARD(EXIT_TEXT)				\
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index e373e2e10f6a..a11f86014352 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -617,8 +617,8 @@
 
 #define EXIT_DATA							\
 	*(.exit.data .exit.data.*)					\
-	*(.fini_array)							\
-	*(.dtors)							\
+	*(.fini_array .fini_array.*)					\
+	*(.dtors .dtors.*)						\
 	MEM_DISCARD(exit.data*)						\
 	MEM_DISCARD(exit.rodata*)
 
-- 
2.17.1

[PATCH AUTOSEL 4.18 25/27] vmlinux.lds.h: Fix linker warnings about orphan .LPBX sections

[Sasha Levin]

From: Peter Oberparleiter <oberpar@linux.ibm.com>

[ Upstream commit 52c8ee5bad8f33d02c567f6609f43d69303fc48d ]

Enabling both CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y and
CONFIG_GCOV_PROFILE_ALL=y results in linker warnings:

  warning: orphan section `.data..LPBX1' being placed in
  section `.data..LPBX1'.

LD_DEAD_CODE_DATA_ELIMINATION adds compiler flag -fdata-sections. This
option causes GCC to create separate data sections for data objects,
including those generated by GCC internally for gcov profiling. The
names of these objects start with a dot (.LPBX0, .LPBX1), resulting in
section names starting with 'data..'.

As section names starting with 'data..' are used for specific purposes
in the Linux kernel, the linker script does not automatically include
them in the output data section, resulting in the "orphan section"
linker warnings.

Fix this by specifically including sections named "data..LPBX*" in the
data section.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Tested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Tested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 include/asm-generic/vmlinux.lds.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index a11f86014352..83b930988e21 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -70,7 +70,7 @@
  */
 #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
 #define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
-#define DATA_MAIN .data .data.[0-9a-zA-Z_]*
+#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX*
 #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
 #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]*
 #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]*
-- 
2.17.1

[PATCH AUTOSEL 4.18 26/27] afs: Fix cell proc list

[Sasha Levin]

From: David Howells <dhowells@redhat.com>

[ Upstream commit 6b3944e42e2e554aa5a4be681ecd70dccd459114 ]

Access to the list of cells by /proc/net/afs/cells has a couple of
problems:

 (1) It should be checking against SEQ_START_TOKEN for the keying the
     header line.

 (2) It's only holding the RCU read lock, so it can't just walk over the
     list without following the proper RCU methods.

Fix these by using an hlist instead of an ordinary list and using the
appropriate accessor functions to follow it with RCU.

Since the code that adds a cell to the list must also necessarily change,
sort the list on insertion whilst we're at it.

Fixes: 989782dcdc91 ("afs: Overhaul cell database management")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/afs/cell.c     | 17 +++++++++++++++--
 fs/afs/dynroot.c  |  2 +-
 fs/afs/internal.h |  4 ++--
 fs/afs/main.c     |  2 +-
 fs/afs/proc.c     |  7 +++----
 5 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/fs/afs/cell.c b/fs/afs/cell.c
index f3d0bef16d78..6127f0fcd62c 100644
--- a/fs/afs/cell.c
+++ b/fs/afs/cell.c
@@ -514,6 +514,8 @@ static int afs_alloc_anon_key(struct afs_cell *cell)
  */
 static int afs_activate_cell(struct afs_net *net, struct afs_cell *cell)
 {
+	struct hlist_node **p;
+	struct afs_cell *pcell;
 	int ret;
 
 	if (!cell->anonymous_key) {
@@ -534,7 +536,18 @@ static int afs_activate_cell(struct afs_net *net, struct afs_cell *cell)
 		return ret;
 
 	mutex_lock(&net->proc_cells_lock);
-	list_add_tail(&cell->proc_link, &net->proc_cells);
+	for (p = &net->proc_cells.first; *p; p = &(*p)->next) {
+		pcell = hlist_entry(*p, struct afs_cell, proc_link);
+		if (strcmp(cell->name, pcell->name) < 0)
+			break;
+	}
+
+	cell->proc_link.pprev = p;
+	cell->proc_link.next = *p;
+	rcu_assign_pointer(*p, &cell->proc_link.next);
+	if (cell->proc_link.next)
+		cell->proc_link.next->pprev = &cell->proc_link.next;
+
 	afs_dynroot_mkdir(net, cell);
 	mutex_unlock(&net->proc_cells_lock);
 	return 0;
@@ -550,7 +563,7 @@ static void afs_deactivate_cell(struct afs_net *net, struct afs_cell *cell)
 	afs_proc_cell_remove(cell);
 
 	mutex_lock(&net->proc_cells_lock);
-	list_del_init(&cell->proc_link);
+	hlist_del_rcu(&cell->proc_link);
 	afs_dynroot_rmdir(net, cell);
 	mutex_unlock(&net->proc_cells_lock);
 
diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c
index 174e843f0633..7de7223843cc 100644
--- a/fs/afs/dynroot.c
+++ b/fs/afs/dynroot.c
@@ -286,7 +286,7 @@ int afs_dynroot_populate(struct super_block *sb)
 		return -ERESTARTSYS;
 
 	net->dynroot_sb = sb;
-	list_for_each_entry(cell, &net->proc_cells, proc_link) {
+	hlist_for_each_entry(cell, &net->proc_cells, proc_link) {
 		ret = afs_dynroot_mkdir(net, cell);
 		if (ret < 0)
 			goto error;
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 9778df135717..270d1caa27c6 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -241,7 +241,7 @@ struct afs_net {
 	seqlock_t		cells_lock;
 
 	struct mutex		proc_cells_lock;
-	struct list_head	proc_cells;
+	struct hlist_head	proc_cells;
 
 	/* Known servers.  Theoretically each fileserver can only be in one
 	 * cell, but in practice, people create aliases and subsets and there's
@@ -319,7 +319,7 @@ struct afs_cell {
 	struct afs_net		*net;
 	struct key		*anonymous_key;	/* anonymous user key for this cell */
 	struct work_struct	manager;	/* Manager for init/deinit/dns */
-	struct list_head	proc_link;	/* /proc cell list link */
+	struct hlist_node	proc_link;	/* /proc cell list link */
 #ifdef CONFIG_AFS_FSCACHE
 	struct fscache_cookie	*cache;		/* caching cookie */
 #endif
diff --git a/fs/afs/main.c b/fs/afs/main.c
index e84fe822a960..107427688edd 100644
--- a/fs/afs/main.c
+++ b/fs/afs/main.c
@@ -87,7 +87,7 @@ static int __net_init afs_net_init(struct net *net_ns)
 	timer_setup(&net->cells_timer, afs_cells_timer, 0);
 
 	mutex_init(&net->proc_cells_lock);
-	INIT_LIST_HEAD(&net->proc_cells);
+	INIT_HLIST_HEAD(&net->proc_cells);
 
 	seqlock_init(&net->fs_lock);
 	net->fs_servers = RB_ROOT;
diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index 476dcbb79713..9101f62707af 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -33,9 +33,8 @@ static inline struct afs_net *afs_seq2net_single(struct seq_file *m)
 static int afs_proc_cells_show(struct seq_file *m, void *v)
 {
 	struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link);
-	struct afs_net *net = afs_seq2net(m);
 
-	if (v == &net->proc_cells) {
+	if (v == SEQ_START_TOKEN) {
 		/* display header on line 1 */
 		seq_puts(m, "USE NAME\n");
 		return 0;
@@ -50,12 +49,12 @@ static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos)
 	__acquires(rcu)
 {
 	rcu_read_lock();
-	return seq_list_start_head(&afs_seq2net(m)->proc_cells, *_pos);
+	return seq_hlist_start_head_rcu(&afs_seq2net(m)->proc_cells, *_pos);
 }
 
 static void *afs_proc_cells_next(struct seq_file *m, void *v, loff_t *pos)
 {
-	return seq_list_next(v, &afs_seq2net(m)->proc_cells, pos);
+	return seq_hlist_next_rcu(v, &afs_seq2net(m)->proc_cells, pos);
 }
 
 static void afs_proc_cells_stop(struct seq_file *m, void *v)
-- 
2.17.1

[PATCH AUTOSEL 4.18 27/27] fs/fat/fatent.c: add cond_resched() to fat_count_free_clusters()

[Sasha Levin]

From: Khazhismel Kumykov <khazhy@google.com>

[ Upstream commit ac081c3be3fae6d0cc3e1862507fca3862d30b67 ]

On non-preempt kernels this loop can take a long time (more than 50 ticks)
processing through entries.

Link: http://lkml.kernel.org/r/20181010172623.57033-1-khazhy@google.com
Signed-off-by: Khazhismel Kumykov <khazhy@google.com>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/fat/fatent.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index 3aef8630a4b9..95d2c716e0da 100644
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -681,6 +681,7 @@ int fat_count_free_clusters(struct super_block *sb)
 			if (ops->ent_get(&fatent) == FAT_ENT_FREE)
 				free++;
 		} while (fat_ent_next(sbi, &fatent));
+		cond_resched();
 	}
 	sbi->free_clusters = free;
 	sbi->free_clus_valid = 1;
-- 
2.17.1