* [PATCH 1/2] usb: dwc3: add a power supply for current control
2021-02-22 11:51 [PATCH 0/2] an additional path to control charging current Ray Chi
@ 2021-02-22 11:51 ` Ray Chi
2021-03-04 17:24 ` Naresh Kamboju
2021-02-22 11:51 ` [PATCH 2/2] usb: dwc3: add an alternate path in vbus_draw callback Ray Chi
2021-03-03 15:01 ` [PATCH 0/2] an additional path to control charging current Heiko Thiery
2 siblings, 1 reply; 7+ messages in thread
From: Ray Chi @ 2021-02-22 11:51 UTC (permalink / raw)
To: balbi, gregkh; +Cc: linux-usb, linux-kernel, kyletso, badhri, Ray Chi
Currently, VBUS draw callback does no action when the
generic PHYs are used. This patch adds an additional
path to control charging current through power supply
interface.
Signed-off-by: Ray Chi <raychi@google.com>
---
drivers/usb/dwc3/core.c | 15 +++++++++++++++
drivers/usb/dwc3/core.h | 4 ++++
2 files changed, 19 insertions(+)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index f2448d0a9d39..d15f065849cd 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1238,6 +1238,8 @@ static void dwc3_get_properties(struct dwc3 *dwc)
u8 rx_max_burst_prd;
u8 tx_thr_num_pkt_prd;
u8 tx_max_burst_prd;
+ const char *usb_psy_name;
+ int ret;
/* default to highest possible threshold */
lpm_nyet_threshold = 0xf;
@@ -1263,6 +1265,13 @@ static void dwc3_get_properties(struct dwc3 *dwc)
else
dwc->sysdev = dwc->dev;
+ ret = device_property_read_string(dev, "usb-psy-name", &usb_psy_name);
+ if (ret >= 0) {
+ dwc->usb_psy = power_supply_get_by_name(usb_psy_name);
+ if (!dwc->usb_psy)
+ dev_err(dev, "couldn't get usb power supply\n");
+ }
+
dwc->has_lpm_erratum = device_property_read_bool(dev,
"snps,has-lpm-erratum");
device_property_read_u8(dev, "snps,lpm-nyet-threshold",
@@ -1619,6 +1628,9 @@ static int dwc3_probe(struct platform_device *pdev)
assert_reset:
reset_control_assert(dwc->reset);
+ if (!dwc->usb_psy)
+ power_supply_put(dwc->usb_psy);
+
return ret;
}
@@ -1641,6 +1653,9 @@ static int dwc3_remove(struct platform_device *pdev)
dwc3_free_event_buffers(dwc);
dwc3_free_scratch_buffers(dwc);
+ if (!dwc->usb_psy)
+ power_supply_put(dwc->usb_psy);
+
return 0;
}
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 052b20d52651..6708fdf358b3 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -30,6 +30,8 @@
#include <linux/phy/phy.h>
+#include <linux/power_supply.h>
+
#define DWC3_MSG_MAX 500
/* Global constants */
@@ -1125,6 +1127,8 @@ struct dwc3 {
struct usb_role_switch *role_sw;
enum usb_dr_mode role_switch_default_mode;
+ struct power_supply *usb_psy;
+
u32 fladj;
u32 irq_gadget;
u32 otg_irq;
--
2.30.0.617.g56c4b15f3c-goog
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [PATCH 1/2] usb: dwc3: add a power supply for current control
2021-02-22 11:51 ` [PATCH 1/2] usb: dwc3: add a power supply for current control Ray Chi
@ 2021-03-04 17:24 ` Naresh Kamboju
0 siblings, 0 replies; 7+ messages in thread
From: Naresh Kamboju @ 2021-03-04 17:24 UTC (permalink / raw)
To: Ray Chi, linux-mips, Linux-Next Mailing List
Cc: Felipe Balbi, Greg Kroah-Hartman, linux-usb, open list, kyletso,
badhri, lkft-triage
While building linux next 20210304 the following builds failed,
- mips (cavium_octeon_defconfig) with gcc-8
- mips (cavium_octeon_defconfig) with gcc-9
- mips (cavium_octeon_defconfig) with gcc-10
On Mon, 22 Feb 2021 at 17:24, Ray Chi <raychi@google.com> wrote:
>
> Currently, VBUS draw callback does no action when the
> generic PHYs are used. This patch adds an additional
> path to control charging current through power supply
> interface.
>
> Signed-off-by: Ray Chi <raychi@google.com>
> ---
> drivers/usb/dwc3/core.c | 15 +++++++++++++++
> drivers/usb/dwc3/core.h | 4 ++++
> 2 files changed, 19 insertions(+)
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index f2448d0a9d39..d15f065849cd 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -1238,6 +1238,8 @@ static void dwc3_get_properties(struct dwc3 *dwc)
> u8 rx_max_burst_prd;
> u8 tx_thr_num_pkt_prd;
> u8 tx_max_burst_prd;
> + const char *usb_psy_name;
> + int ret;
>
> /* default to highest possible threshold */
> lpm_nyet_threshold = 0xf;
> @@ -1263,6 +1265,13 @@ static void dwc3_get_properties(struct dwc3 *dwc)
> else
> dwc->sysdev = dwc->dev;
>
> + ret = device_property_read_string(dev, "usb-psy-name", &usb_psy_name);
> + if (ret >= 0) {
> + dwc->usb_psy = power_supply_get_by_name(usb_psy_name);
> + if (!dwc->usb_psy)
> + dev_err(dev, "couldn't get usb power supply\n");
> + }
> +
> dwc->has_lpm_erratum = device_property_read_bool(dev,
> "snps,has-lpm-erratum");
> device_property_read_u8(dev, "snps,lpm-nyet-threshold",
> @@ -1619,6 +1628,9 @@ static int dwc3_probe(struct platform_device *pdev)
> assert_reset:
> reset_control_assert(dwc->reset);
>
> + if (!dwc->usb_psy)
> + power_supply_put(dwc->usb_psy);
> +
> return ret;
> }
>
> @@ -1641,6 +1653,9 @@ static int dwc3_remove(struct platform_device *pdev)
> dwc3_free_event_buffers(dwc);
> dwc3_free_scratch_buffers(dwc);
>
> + if (!dwc->usb_psy)
> + power_supply_put(dwc->usb_psy);
# to reproduce this build locally:
tuxmake --target-arch=mips --kconfig=cavium_octeon_defconfig
--toolchain=gcc-8 --wrapper=sccache
--environment=SCCACHE_BUCKET=sccache.tuxbuild.com --runtime=podman
--image=public.ecr.aws/tuxmake/mips_gcc-8 config default kernel
xipkernel modules dtbs dtbs-legacy debugkernel headers
make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/1/tmp ARCH=mips
CROSS_COMPILE=mips-linux-gnu- 'CC=sccache mips-linux-gnu-gcc'
'HOSTCC=sccache gcc' cavium_octeon_defconfig
make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/1/tmp ARCH=mips
CROSS_COMPILE=mips-linux-gnu- 'CC=sccache mips-linux-gnu-gcc'
'HOSTCC=sccache gcc'
kernel/sched/fair.c:8384:13: warning: 'update_nohz_stats' defined but
not used [-Wunused-function]
static bool update_nohz_stats(struct rq *rq)
^~~~~~~~~~~~~~~~~
mips-linux-gnu-ld: drivers/usb/dwc3/core.o: in function `dwc3_remove':
drivers/usb/dwc3/core.c:1657: undefined reference to `power_supply_put'
mips-linux-gnu-ld: drivers/usb/dwc3/core.o: in function `dwc3_get_properties':
drivers/usb/dwc3/core.c:1270: undefined reference to `power_supply_get_by_name'
mips-linux-gnu-ld: drivers/usb/dwc3/core.o: in function `dwc3_probe':
drivers/usb/dwc3/core.c:1632: undefined reference to `power_supply_put'
Build link,
https://gitlab.com/Linaro/lkft/mirrors/next/linux-next/-/jobs/1071668201#L146
--
Linaro LKFT
https://lkft.linaro.org
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH 2/2] usb: dwc3: add an alternate path in vbus_draw callback
2021-02-22 11:51 [PATCH 0/2] an additional path to control charging current Ray Chi
2021-02-22 11:51 ` [PATCH 1/2] usb: dwc3: add a power supply for current control Ray Chi
@ 2021-02-22 11:51 ` Ray Chi
2021-03-03 15:01 ` [PATCH 0/2] an additional path to control charging current Heiko Thiery
2 siblings, 0 replies; 7+ messages in thread
From: Ray Chi @ 2021-02-22 11:51 UTC (permalink / raw)
To: balbi, gregkh; +Cc: linux-usb, linux-kernel, kyletso, badhri, Ray Chi
This patch adds an alternate path in vbus_draw callback through
power supply property POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT.
Signed-off-by: Ray Chi <raychi@google.com>
---
drivers/usb/dwc3/gadget.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index aebcf8ec0716..47809835e163 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2530,11 +2530,19 @@ static void dwc3_gadget_set_ssp_rate(struct usb_gadget *g,
static int dwc3_gadget_vbus_draw(struct usb_gadget *g, unsigned int mA)
{
struct dwc3 *dwc = gadget_to_dwc(g);
+ union power_supply_propval val = {0};
+ int ret;
if (dwc->usb2_phy)
return usb_phy_set_power(dwc->usb2_phy, mA);
- return 0;
+ if (!dwc->usb_psy)
+ return -EOPNOTSUPP;
+
+ val.intval = mA;
+ ret = power_supply_set_property(dwc->usb_psy, POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, &val);
+
+ return ret;
}
static const struct usb_gadget_ops dwc3_gadget_ops = {
--
2.30.0.617.g56c4b15f3c-goog
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [PATCH 0/2] an additional path to control charging current
2021-02-22 11:51 [PATCH 0/2] an additional path to control charging current Ray Chi
2021-02-22 11:51 ` [PATCH 1/2] usb: dwc3: add a power supply for current control Ray Chi
2021-02-22 11:51 ` [PATCH 2/2] usb: dwc3: add an alternate path in vbus_draw callback Ray Chi
@ 2021-03-03 15:01 ` Heiko Thiery
2021-03-03 15:26 ` Heiko Thiery
2 siblings, 1 reply; 7+ messages in thread
From: Heiko Thiery @ 2021-03-03 15:01 UTC (permalink / raw)
To: raychi
Cc: badhri, balbi, gregkh, kyletso, linux-kernel, linux-usb, Heiko Thiery
Hi Ray,
> Currently, VBUS draw callback does no action when the
> generic PHYs are used. The patches add an additional path
> to control charging current through power supply property
> POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT.
>
> Ray Chi (2):
> usb: dwc3: add a power supply for current control
> usb: dwc3: add an alternate path in vbus_draw callback
While using next-20210303 this patchset leads to the following kernel crash on my board:
---- 8< ----
[ 1.392084] VFIO - User Level meta-driver version: 0.3
[ 1.398370] Unable to handle kernel NULL pointer dereference at virtual address 00000000000003a0
[ 1.407552] Mem abort info:
[ 1.410479] ESR = 0x96000004
[ 1.413668] EC = 0x25: DABT (current EL), IL = 32 bits
[ 1.419217] SET = 0, FnV = 0
[ 1.422413] EA = 0, S1PTW = 0
[ 1.425690] Data abort info:
[ 1.428705] ISV = 0, ISS = 0x00000004
[ 1.432715] CM = 0, WnR = 0
[ 1.435821] [00000000000003a0] user address but active_mm is swapper
[ 1.442458] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[ 1.448274] Modules linked in:
[ 1.451469] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc1-next-20210303-00005-g090e892099db #126
[ 1.461269] Hardware name: Kontron pITX-imx8m (DT)
[ 1.466268] pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
[ 1.472538] pc : devm_power_supply_get_by_phandle+0xe4/0x148
[ 1.478455] lr : dwc3_probe+0xbac/0xfa0
[ 1.482462] sp : ffff800011f1bb00
[ 1.485918] x29: ffff800011f1bb00 x28: 0000000000000000
[ 1.491467] x27: ffff800011681078 x26: ffff8000115d048c
[ 1.497016] x25: ffff0000c089ea00 x24: 0000000000000003
[ 1.502564] x23: ffff0000c089ea00 x22: ffff800011b89948
[ 1.508112] x21: 0000000000000003 x20: 00000000fffffdfb
[ 1.513660] x19: ffff0000c03f1080 x18: 00000000000000c0
[ 1.519209] x17: 0000000000000000 x16: 0000000000000000
[ 1.524757] x15: fffffc0000001000 x14: 0000000000000000
[ 1.530306] x13: 0000000000000000 x12: 0000000000000030
[ 1.535853] x11: 0101010101010101 x10: ffff800011f1ba50
[ 1.541402] x9 : ffff0000ff784c70 x8 : 0000000000000010
[ 1.546950] x7 : ffff0000c03a5590 x6 : 0000000000000080
[ 1.552498] x5 : ffff0000c0098000 x4 : 00000000000003a0
[ 1.558047] x3 : ffff800011cb2dc8 x2 : 0000000000000000
[ 1.563596] x1 : 0000000000000001 x0 : 0000000000000000
[ 1.569146] Call trace:
[ 1.571700] devm_power_supply_get_by_phandle+0xe4/0x148
[ 1.577248] dwc3_probe+0xbac/0xfa0
[ 1.580890] platform_probe+0x68/0xd8
[ 1.584719] really_probe+0xe4/0x3c0
[ 1.588454] driver_probe_device+0x58/0xb8
[ 1.592733] device_driver_attach+0x74/0x80
[ 1.597100] __driver_attach+0x58/0xe0
[ 1.601016] bus_for_each_dev+0x74/0xc8
[ 1.605020] driver_attach+0x24/0x30
[ 1.608753] bus_add_driver+0x184/0x1e8
[ 1.612758] driver_register+0x64/0x120
[ 1.616764] __platform_driver_register+0x28/0x38
[ 1.621675] dwc3_driver_init+0x1c/0x28
[ 1.625684] do_one_initcall+0x74/0x1d0
[ 1.629691] kernel_init_freeable+0x1d4/0x23c
[ 1.634240] kernel_init+0x14/0x118
[ 1.637885] ret_from_fork+0x10/0x30
[ 1.641624] Code: 88027c01 35ffffa2 17fffe96 f9800091 (885f7c82)
[ 1.647992] ---[ end trace c6e48cea897d0b0d ]---
[ 1.652833] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[ 1.660822] SMP: stopping secondary CPUs
[ 1.664921] Kernel Offset: disabled
[ 1.668560] CPU features: 0x00240002,2000200c
[ 1.673106] Memory Limit: none
[ 1.676296] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---
---- 8< ----
After reverting these 2 patches the problem is gone.
--
Heiko
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH 0/2] an additional path to control charging current
2021-03-03 15:01 ` [PATCH 0/2] an additional path to control charging current Heiko Thiery
@ 2021-03-03 15:26 ` Heiko Thiery
2021-03-04 8:21 ` Greg KH
0 siblings, 1 reply; 7+ messages in thread
From: Heiko Thiery @ 2021-03-03 15:26 UTC (permalink / raw)
To: raychi; +Cc: badhri, balbi, gregkh, kyletso, linux-kernel, linux-usb
Hi,
Am Mi., 3. März 2021 um 16:01 Uhr schrieb Heiko Thiery <heiko.thiery@gmail.com>:
>
> Hi Ray,
>
>
> > Currently, VBUS draw callback does no action when the
> > generic PHYs are used. The patches add an additional path
> > to control charging current through power supply property
> > POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT.
> >
> > Ray Chi (2):
> > usb: dwc3: add a power supply for current control
> > usb: dwc3: add an alternate path in vbus_draw callback
>
> While using next-20210303 this patchset leads to the following kernel crash on my board:
>
> ---- 8< ----
>
> [ 1.392084] VFIO - User Level meta-driver version: 0.3
> [ 1.398370] Unable to handle kernel NULL pointer dereference at virtual address 00000000000003a0
> [ 1.407552] Mem abort info:
> [ 1.410479] ESR = 0x96000004
> [ 1.413668] EC = 0x25: DABT (current EL), IL = 32 bits
> [ 1.419217] SET = 0, FnV = 0
> [ 1.422413] EA = 0, S1PTW = 0
> [ 1.425690] Data abort info:
> [ 1.428705] ISV = 0, ISS = 0x00000004
> [ 1.432715] CM = 0, WnR = 0
> [ 1.435821] [00000000000003a0] user address but active_mm is swapper
> [ 1.442458] Internal error: Oops: 96000004 [#1] PREEMPT SMP
> [ 1.448274] Modules linked in:
> [ 1.451469] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc1-next-20210303-00005-g090e892099db #126
> [ 1.461269] Hardware name: Kontron pITX-imx8m (DT)
> [ 1.466268] pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
> [ 1.472538] pc : devm_power_supply_get_by_phandle+0xe4/0x148
> [ 1.478455] lr : dwc3_probe+0xbac/0xfa0
> [ 1.482462] sp : ffff800011f1bb00
> [ 1.485918] x29: ffff800011f1bb00 x28: 0000000000000000
> [ 1.491467] x27: ffff800011681078 x26: ffff8000115d048c
> [ 1.497016] x25: ffff0000c089ea00 x24: 0000000000000003
> [ 1.502564] x23: ffff0000c089ea00 x22: ffff800011b89948
> [ 1.508112] x21: 0000000000000003 x20: 00000000fffffdfb
> [ 1.513660] x19: ffff0000c03f1080 x18: 00000000000000c0
> [ 1.519209] x17: 0000000000000000 x16: 0000000000000000
> [ 1.524757] x15: fffffc0000001000 x14: 0000000000000000
> [ 1.530306] x13: 0000000000000000 x12: 0000000000000030
> [ 1.535853] x11: 0101010101010101 x10: ffff800011f1ba50
> [ 1.541402] x9 : ffff0000ff784c70 x8 : 0000000000000010
> [ 1.546950] x7 : ffff0000c03a5590 x6 : 0000000000000080
> [ 1.552498] x5 : ffff0000c0098000 x4 : 00000000000003a0
> [ 1.558047] x3 : ffff800011cb2dc8 x2 : 0000000000000000
> [ 1.563596] x1 : 0000000000000001 x0 : 0000000000000000
> [ 1.569146] Call trace:
> [ 1.571700] devm_power_supply_get_by_phandle+0xe4/0x148
> [ 1.577248] dwc3_probe+0xbac/0xfa0
> [ 1.580890] platform_probe+0x68/0xd8
> [ 1.584719] really_probe+0xe4/0x3c0
> [ 1.588454] driver_probe_device+0x58/0xb8
> [ 1.592733] device_driver_attach+0x74/0x80
> [ 1.597100] __driver_attach+0x58/0xe0
> [ 1.601016] bus_for_each_dev+0x74/0xc8
> [ 1.605020] driver_attach+0x24/0x30
> [ 1.608753] bus_add_driver+0x184/0x1e8
> [ 1.612758] driver_register+0x64/0x120
> [ 1.616764] __platform_driver_register+0x28/0x38
> [ 1.621675] dwc3_driver_init+0x1c/0x28
> [ 1.625684] do_one_initcall+0x74/0x1d0
> [ 1.629691] kernel_init_freeable+0x1d4/0x23c
> [ 1.634240] kernel_init+0x14/0x118
> [ 1.637885] ret_from_fork+0x10/0x30
> [ 1.641624] Code: 88027c01 35ffffa2 17fffe96 f9800091 (885f7c82)
> [ 1.647992] ---[ end trace c6e48cea897d0b0d ]---
> [ 1.652833] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> [ 1.660822] SMP: stopping secondary CPUs
> [ 1.664921] Kernel Offset: disabled
> [ 1.668560] CPU features: 0x00240002,2000200c
> [ 1.673106] Memory Limit: none
> [ 1.676296] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---
>
>
> ---- 8< ----
This fixes the crash.
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index d15f065849cd..94fdbe502ce9 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1628,7 +1628,7 @@ static int dwc3_probe(struct platform_device *pdev)
assert_reset:
reset_control_assert(dwc->reset);
- if (!dwc->usb_psy)
+ if (dwc->usb_psy)
power_supply_put(dwc->usb_psy);
return ret;
@@ -1653,7 +1653,7 @@ static int dwc3_remove(struct platform_device *pdev)
dwc3_free_event_buffers(dwc);
dwc3_free_scratch_buffers(dwc);
- if (!dwc->usb_psy)
+ if (dwc->usb_psy)
power_supply_put(dwc->usb_psy);
return 0;
--
Heiko
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [PATCH 0/2] an additional path to control charging current
2021-03-03 15:26 ` Heiko Thiery
@ 2021-03-04 8:21 ` Greg KH
0 siblings, 0 replies; 7+ messages in thread
From: Greg KH @ 2021-03-04 8:21 UTC (permalink / raw)
To: Heiko Thiery; +Cc: raychi, badhri, balbi, kyletso, linux-kernel, linux-usb
On Wed, Mar 03, 2021 at 04:26:38PM +0100, Heiko Thiery wrote:
> Hi,
>
> Am Mi., 3. März 2021 um 16:01 Uhr schrieb Heiko Thiery <heiko.thiery@gmail.com>:
> >
> > Hi Ray,
> >
> >
> > > Currently, VBUS draw callback does no action when the
> > > generic PHYs are used. The patches add an additional path
> > > to control charging current through power supply property
> > > POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT.
> > >
> > > Ray Chi (2):
> > > usb: dwc3: add a power supply for current control
> > > usb: dwc3: add an alternate path in vbus_draw callback
> >
> > While using next-20210303 this patchset leads to the following kernel crash on my board:
> >
> > ---- 8< ----
> >
> > [ 1.392084] VFIO - User Level meta-driver version: 0.3
> > [ 1.398370] Unable to handle kernel NULL pointer dereference at virtual address 00000000000003a0
> > [ 1.407552] Mem abort info:
> > [ 1.410479] ESR = 0x96000004
> > [ 1.413668] EC = 0x25: DABT (current EL), IL = 32 bits
> > [ 1.419217] SET = 0, FnV = 0
> > [ 1.422413] EA = 0, S1PTW = 0
> > [ 1.425690] Data abort info:
> > [ 1.428705] ISV = 0, ISS = 0x00000004
> > [ 1.432715] CM = 0, WnR = 0
> > [ 1.435821] [00000000000003a0] user address but active_mm is swapper
> > [ 1.442458] Internal error: Oops: 96000004 [#1] PREEMPT SMP
> > [ 1.448274] Modules linked in:
> > [ 1.451469] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc1-next-20210303-00005-g090e892099db #126
> > [ 1.461269] Hardware name: Kontron pITX-imx8m (DT)
> > [ 1.466268] pstate: 60000005 (nZCv daif -PAN -UAO -TCO BTYPE=--)
> > [ 1.472538] pc : devm_power_supply_get_by_phandle+0xe4/0x148
> > [ 1.478455] lr : dwc3_probe+0xbac/0xfa0
> > [ 1.482462] sp : ffff800011f1bb00
> > [ 1.485918] x29: ffff800011f1bb00 x28: 0000000000000000
> > [ 1.491467] x27: ffff800011681078 x26: ffff8000115d048c
> > [ 1.497016] x25: ffff0000c089ea00 x24: 0000000000000003
> > [ 1.502564] x23: ffff0000c089ea00 x22: ffff800011b89948
> > [ 1.508112] x21: 0000000000000003 x20: 00000000fffffdfb
> > [ 1.513660] x19: ffff0000c03f1080 x18: 00000000000000c0
> > [ 1.519209] x17: 0000000000000000 x16: 0000000000000000
> > [ 1.524757] x15: fffffc0000001000 x14: 0000000000000000
> > [ 1.530306] x13: 0000000000000000 x12: 0000000000000030
> > [ 1.535853] x11: 0101010101010101 x10: ffff800011f1ba50
> > [ 1.541402] x9 : ffff0000ff784c70 x8 : 0000000000000010
> > [ 1.546950] x7 : ffff0000c03a5590 x6 : 0000000000000080
> > [ 1.552498] x5 : ffff0000c0098000 x4 : 00000000000003a0
> > [ 1.558047] x3 : ffff800011cb2dc8 x2 : 0000000000000000
> > [ 1.563596] x1 : 0000000000000001 x0 : 0000000000000000
> > [ 1.569146] Call trace:
> > [ 1.571700] devm_power_supply_get_by_phandle+0xe4/0x148
> > [ 1.577248] dwc3_probe+0xbac/0xfa0
> > [ 1.580890] platform_probe+0x68/0xd8
> > [ 1.584719] really_probe+0xe4/0x3c0
> > [ 1.588454] driver_probe_device+0x58/0xb8
> > [ 1.592733] device_driver_attach+0x74/0x80
> > [ 1.597100] __driver_attach+0x58/0xe0
> > [ 1.601016] bus_for_each_dev+0x74/0xc8
> > [ 1.605020] driver_attach+0x24/0x30
> > [ 1.608753] bus_add_driver+0x184/0x1e8
> > [ 1.612758] driver_register+0x64/0x120
> > [ 1.616764] __platform_driver_register+0x28/0x38
> > [ 1.621675] dwc3_driver_init+0x1c/0x28
> > [ 1.625684] do_one_initcall+0x74/0x1d0
> > [ 1.629691] kernel_init_freeable+0x1d4/0x23c
> > [ 1.634240] kernel_init+0x14/0x118
> > [ 1.637885] ret_from_fork+0x10/0x30
> > [ 1.641624] Code: 88027c01 35ffffa2 17fffe96 f9800091 (885f7c82)
> > [ 1.647992] ---[ end trace c6e48cea897d0b0d ]---
> > [ 1.652833] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> > [ 1.660822] SMP: stopping secondary CPUs
> > [ 1.664921] Kernel Offset: disabled
> > [ 1.668560] CPU features: 0x00240002,2000200c
> > [ 1.673106] Memory Limit: none
> > [ 1.676296] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---
> >
> >
> > ---- 8< ----
>
> This fixes the crash.
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index d15f065849cd..94fdbe502ce9 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -1628,7 +1628,7 @@ static int dwc3_probe(struct platform_device *pdev)
> assert_reset:
> reset_control_assert(dwc->reset);
>
> - if (!dwc->usb_psy)
> + if (dwc->usb_psy)
> power_supply_put(dwc->usb_psy);
>
> return ret;
> @@ -1653,7 +1653,7 @@ static int dwc3_remove(struct platform_device *pdev)
> dwc3_free_event_buffers(dwc);
> dwc3_free_scratch_buffers(dwc);
>
> - if (!dwc->usb_psy)
> + if (dwc->usb_psy)
> power_supply_put(dwc->usb_psy);
>
> return 0;
>
Fixed with d05a12f0478c ("usb: dwc3: Fix dereferencing of null
dwc->usb_psy") in my tree and should show up in the next linux-next.
thanks,
greg k-h
^ permalink raw reply [flat|nested] 7+ messages in thread