* Re: [PATCH v2 1/2] serial: 8250_pci: Replace custom pci_match_id() implementation
@ 2021-10-26 14:47 kernel test robot
0 siblings, 0 replies; 8+ messages in thread
From: kernel test robot @ 2021-10-26 14:47 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 3486 bytes --]
CC: kbuild-all(a)lists.01.org
In-Reply-To: <20211025124533.29977-1-andriy.shevchenko@linux.intel.com>
References: <20211025124533.29977-1-andriy.shevchenko@linux.intel.com>
TO: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
TO: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
TO: linux-serial(a)vger.kernel.org
TO: linux-kernel(a)vger.kernel.org
CC: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>
CC: Jiri Slaby <jirislaby@kernel.org>
Hi Andy,
I love your patch! Perhaps something to improve:
[auto build test WARNING on tty/tty-testing]
[cannot apply to v5.15-rc7 next-20211026]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Andy-Shevchenko/serial-8250_pci-Replace-custom-pci_match_id-implementation/20211025-204752
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
:::::: branch date: 26 hours ago
:::::: commit date: 26 hours ago
config: i386-randconfig-m021-20211025 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
smatch warnings:
drivers/tty/serial/8250/8250_pci.c:1273 pci_quatech_init() error: uninitialized symbol 'amcc'.
vim +/amcc +1273 drivers/tty/serial/8250/8250_pci.c
55c7c0fdc5aae4 Alan Cox 2012-11-29 1261
55c7c0fdc5aae4 Alan Cox 2012-11-29 1262 static int pci_quatech_init(struct pci_dev *dev)
55c7c0fdc5aae4 Alan Cox 2012-11-29 1263 {
24a32531ba63f4 Andy Shevchenko 2021-10-25 1264 const struct pci_device_id *match;
24a32531ba63f4 Andy Shevchenko 2021-10-25 1265 bool amcc;
24a32531ba63f4 Andy Shevchenko 2021-10-25 1266
24a32531ba63f4 Andy Shevchenko 2021-10-25 1267 match = pci_match_id(quatech_cards, dev);
24a32531ba63f4 Andy Shevchenko 2021-10-25 1268 if (match)
24a32531ba63f4 Andy Shevchenko 2021-10-25 1269 amcc = match->driver_data;
24a32531ba63f4 Andy Shevchenko 2021-10-25 1270 else
24a32531ba63f4 Andy Shevchenko 2021-10-25 1271 pci_err(dev, "unknown port type '0x%04X'.\n", dev->device);
24a32531ba63f4 Andy Shevchenko 2021-10-25 1272
24a32531ba63f4 Andy Shevchenko 2021-10-25 @1273 if (amcc) {
55c7c0fdc5aae4 Alan Cox 2012-11-29 1274 unsigned long base = pci_resource_start(dev, 0);
55c7c0fdc5aae4 Alan Cox 2012-11-29 1275 if (base) {
55c7c0fdc5aae4 Alan Cox 2012-11-29 1276 u32 tmp;
1a33e342cf35e5 Anton Wuerfel 2016-01-14 1277
9c5320f8d7d9a2 Jonathan Woithe 2013-12-09 1278 outl(inl(base + 0x38) | 0x00002000, base + 0x38);
55c7c0fdc5aae4 Alan Cox 2012-11-29 1279 tmp = inl(base + 0x3c);
55c7c0fdc5aae4 Alan Cox 2012-11-29 1280 outl(tmp | 0x01000000, base + 0x3c);
9c5320f8d7d9a2 Jonathan Woithe 2013-12-09 1281 outl(tmp &= ~0x01000000, base + 0x3c);
55c7c0fdc5aae4 Alan Cox 2012-11-29 1282 }
55c7c0fdc5aae4 Alan Cox 2012-11-29 1283 }
55c7c0fdc5aae4 Alan Cox 2012-11-29 1284 return 0;
55c7c0fdc5aae4 Alan Cox 2012-11-29 1285 }
55c7c0fdc5aae4 Alan Cox 2012-11-29 1286
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 39144 bytes --]
^ permalink raw reply [flat|nested] 8+ messages in thread* [PATCH v2 1/2] serial: 8250_pci: Replace custom pci_match_id() implementation
@ 2021-10-25 12:45 Andy Shevchenko
2021-10-26 12:45 ` kernel test robot
0 siblings, 1 reply; 8+ messages in thread
From: Andy Shevchenko @ 2021-10-25 12:45 UTC (permalink / raw)
To: Andy Shevchenko, linux-serial, linux-kernel
Cc: Greg Kroah-Hartman, Jiri Slaby
Replace pci_quatech_amcc() with generic pci_match_id().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: corrected set of patches, so this one is new
drivers/tty/serial/8250/8250_pci.c | 72 +++++++++++++-----------------
1 file changed, 31 insertions(+), 41 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index aea12263a1ff..1d5579143fc8 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -1063,13 +1063,6 @@ static int pci_asix_setup(struct serial_private *priv,
return pci_default_setup(priv, board, port, idx);
}
-/* Quatech devices have their own extra interface features */
-
-struct quatech_feature {
- u16 devid;
- bool amcc;
-};
-
#define QPCR_TEST_FOR1 0x3F
#define QPCR_TEST_GET1 0x00
#define QPCR_TEST_FOR2 0x40
@@ -1085,42 +1078,30 @@ struct quatech_feature {
#define QOPR_CLOCK_X8 0x0003
#define QOPR_CLOCK_RATE_MASK 0x0003
-
-static struct quatech_feature quatech_cards[] = {
- { PCI_DEVICE_ID_QUATECH_QSC100, 1 },
- { PCI_DEVICE_ID_QUATECH_DSC100, 1 },
- { PCI_DEVICE_ID_QUATECH_DSC100E, 0 },
- { PCI_DEVICE_ID_QUATECH_DSC200, 1 },
- { PCI_DEVICE_ID_QUATECH_DSC200E, 0 },
- { PCI_DEVICE_ID_QUATECH_ESC100D, 1 },
- { PCI_DEVICE_ID_QUATECH_ESC100M, 1 },
- { PCI_DEVICE_ID_QUATECH_QSCP100, 1 },
- { PCI_DEVICE_ID_QUATECH_DSCP100, 1 },
- { PCI_DEVICE_ID_QUATECH_QSCP200, 1 },
- { PCI_DEVICE_ID_QUATECH_DSCP200, 1 },
- { PCI_DEVICE_ID_QUATECH_ESCLP100, 0 },
- { PCI_DEVICE_ID_QUATECH_QSCLP100, 0 },
- { PCI_DEVICE_ID_QUATECH_DSCLP100, 0 },
- { PCI_DEVICE_ID_QUATECH_SSCLP100, 0 },
- { PCI_DEVICE_ID_QUATECH_QSCLP200, 0 },
- { PCI_DEVICE_ID_QUATECH_DSCLP200, 0 },
- { PCI_DEVICE_ID_QUATECH_SSCLP200, 0 },
- { PCI_DEVICE_ID_QUATECH_SPPXP_100, 0 },
+/* Quatech devices have their own extra interface features */
+static struct pci_device_id quatech_cards[] = {
+ { PCI_DEVICE_DATA(QUATECH, QSC100, 1) },
+ { PCI_DEVICE_DATA(QUATECH, DSC100, 1) },
+ { PCI_DEVICE_DATA(QUATECH, DSC100E, 0) },
+ { PCI_DEVICE_DATA(QUATECH, DSC200, 1) },
+ { PCI_DEVICE_DATA(QUATECH, DSC200E, 0) },
+ { PCI_DEVICE_DATA(QUATECH, ESC100D, 1) },
+ { PCI_DEVICE_DATA(QUATECH, ESC100M, 1) },
+ { PCI_DEVICE_DATA(QUATECH, QSCP100, 1) },
+ { PCI_DEVICE_DATA(QUATECH, DSCP100, 1) },
+ { PCI_DEVICE_DATA(QUATECH, QSCP200, 1) },
+ { PCI_DEVICE_DATA(QUATECH, DSCP200, 1) },
+ { PCI_DEVICE_DATA(QUATECH, ESCLP100, 0) },
+ { PCI_DEVICE_DATA(QUATECH, QSCLP100, 0) },
+ { PCI_DEVICE_DATA(QUATECH, DSCLP100, 0) },
+ { PCI_DEVICE_DATA(QUATECH, SSCLP100, 0) },
+ { PCI_DEVICE_DATA(QUATECH, QSCLP200, 0) },
+ { PCI_DEVICE_DATA(QUATECH, DSCLP200, 0) },
+ { PCI_DEVICE_DATA(QUATECH, SSCLP200, 0) },
+ { PCI_DEVICE_DATA(QUATECH, SPPXP_100, 0) },
{ 0, }
};
-static int pci_quatech_amcc(struct pci_dev *dev)
-{
- struct quatech_feature *qf = &quatech_cards[0];
- while (qf->devid) {
- if (qf->devid == dev->device)
- return qf->amcc;
- qf++;
- }
- pci_err(dev, "unknown port type '0x%04X'.\n", dev->device);
- return 0;
-};
-
static int pci_quatech_rqopr(struct uart_8250_port *port)
{
unsigned long base = port->port.iobase;
@@ -1280,7 +1261,16 @@ static int pci_quatech_rs422(struct uart_8250_port *port)
static int pci_quatech_init(struct pci_dev *dev)
{
- if (pci_quatech_amcc(dev)) {
+ const struct pci_device_id *match;
+ bool amcc;
+
+ match = pci_match_id(quatech_cards, dev);
+ if (match)
+ amcc = match->driver_data;
+ else
+ pci_err(dev, "unknown port type '0x%04X'.\n", dev->device);
+
+ if (amcc) {
unsigned long base = pci_resource_start(dev, 0);
if (base) {
u32 tmp;
--
2.33.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* Re: [PATCH v2 1/2] serial: 8250_pci: Replace custom pci_match_id() implementation
2021-10-25 12:45 Andy Shevchenko
@ 2021-10-26 12:45 ` kernel test robot
0 siblings, 0 replies; 8+ messages in thread
From: kernel test robot @ 2021-10-26 12:45 UTC (permalink / raw)
To: Andy Shevchenko, linux-serial, linux-kernel
Cc: llvm, kbuild-all, Greg Kroah-Hartman, Jiri Slaby
[-- Attachment #1: Type: text/plain, Size: 3084 bytes --]
Hi Andy,
I love your patch! Perhaps something to improve:
[auto build test WARNING on tty/tty-testing]
[cannot apply to v5.15-rc7 next-20211026]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Andy-Shevchenko/serial-8250_pci-Replace-custom-pci_match_id-implementation/20211025-204752
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: i386-randconfig-a003-20211025 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project a461fa64bb37cffd73f683c74f6b0780379fc2ca)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/24a32531ba63f472ec6f40c4d431cb5369b29818
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Andy-Shevchenko/serial-8250_pci-Replace-custom-pci_match_id-implementation/20211025-204752
git checkout 24a32531ba63f472ec6f40c4d431cb5369b29818
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/tty/serial/8250/8250_pci.c:1268:6: warning: variable 'amcc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
if (match)
^~~~~
drivers/tty/serial/8250/8250_pci.c:1273:6: note: uninitialized use occurs here
if (amcc) {
^~~~
drivers/tty/serial/8250/8250_pci.c:1268:2: note: remove the 'if' if its condition is always true
if (match)
^~~~~~~~~~
drivers/tty/serial/8250/8250_pci.c:1265:11: note: initialize the variable 'amcc' to silence this warning
bool amcc;
^
= 0
1 warning generated.
vim +1268 drivers/tty/serial/8250/8250_pci.c
1261
1262 static int pci_quatech_init(struct pci_dev *dev)
1263 {
1264 const struct pci_device_id *match;
1265 bool amcc;
1266
1267 match = pci_match_id(quatech_cards, dev);
> 1268 if (match)
1269 amcc = match->driver_data;
1270 else
1271 pci_err(dev, "unknown port type '0x%04X'.\n", dev->device);
1272
1273 if (amcc) {
1274 unsigned long base = pci_resource_start(dev, 0);
1275 if (base) {
1276 u32 tmp;
1277
1278 outl(inl(base + 0x38) | 0x00002000, base + 0x38);
1279 tmp = inl(base + 0x3c);
1280 outl(tmp | 0x01000000, base + 0x3c);
1281 outl(tmp &= ~0x01000000, base + 0x3c);
1282 }
1283 }
1284 return 0;
1285 }
1286
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 39092 bytes --]
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH v2 1/2] serial: 8250_pci: Replace custom pci_match_id() implementation
@ 2021-10-26 12:45 ` kernel test robot
0 siblings, 0 replies; 8+ messages in thread
From: kernel test robot @ 2021-10-26 12:45 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 3163 bytes --]
Hi Andy,
I love your patch! Perhaps something to improve:
[auto build test WARNING on tty/tty-testing]
[cannot apply to v5.15-rc7 next-20211026]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Andy-Shevchenko/serial-8250_pci-Replace-custom-pci_match_id-implementation/20211025-204752
base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: i386-randconfig-a003-20211025 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project a461fa64bb37cffd73f683c74f6b0780379fc2ca)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/24a32531ba63f472ec6f40c4d431cb5369b29818
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Andy-Shevchenko/serial-8250_pci-Replace-custom-pci_match_id-implementation/20211025-204752
git checkout 24a32531ba63f472ec6f40c4d431cb5369b29818
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/tty/serial/8250/8250_pci.c:1268:6: warning: variable 'amcc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
if (match)
^~~~~
drivers/tty/serial/8250/8250_pci.c:1273:6: note: uninitialized use occurs here
if (amcc) {
^~~~
drivers/tty/serial/8250/8250_pci.c:1268:2: note: remove the 'if' if its condition is always true
if (match)
^~~~~~~~~~
drivers/tty/serial/8250/8250_pci.c:1265:11: note: initialize the variable 'amcc' to silence this warning
bool amcc;
^
= 0
1 warning generated.
vim +1268 drivers/tty/serial/8250/8250_pci.c
1261
1262 static int pci_quatech_init(struct pci_dev *dev)
1263 {
1264 const struct pci_device_id *match;
1265 bool amcc;
1266
1267 match = pci_match_id(quatech_cards, dev);
> 1268 if (match)
1269 amcc = match->driver_data;
1270 else
1271 pci_err(dev, "unknown port type '0x%04X'.\n", dev->device);
1272
1273 if (amcc) {
1274 unsigned long base = pci_resource_start(dev, 0);
1275 if (base) {
1276 u32 tmp;
1277
1278 outl(inl(base + 0x38) | 0x00002000, base + 0x38);
1279 tmp = inl(base + 0x3c);
1280 outl(tmp | 0x01000000, base + 0x3c);
1281 outl(tmp &= ~0x01000000, base + 0x3c);
1282 }
1283 }
1284 return 0;
1285 }
1286
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 39092 bytes --]
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH v2 1/2] serial: 8250_pci: Replace custom pci_match_id() implementation
2021-10-26 12:45 ` kernel test robot
@ 2021-10-26 13:25 ` Andy Shevchenko
-1 siblings, 0 replies; 8+ messages in thread
From: Andy Shevchenko @ 2021-10-26 13:25 UTC (permalink / raw)
To: kernel test robot
Cc: linux-serial, linux-kernel, llvm, kbuild-all, Greg Kroah-Hartman,
Jiri Slaby
On Tue, Oct 26, 2021 at 08:45:48PM +0800, kernel test robot wrote:
> Hi Andy,
>
> I love your patch! Perhaps something to improve:
>
> [auto build test WARNING on tty/tty-testing]
> [cannot apply to v5.15-rc7 next-20211026]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
>
> url: https://github.com/0day-ci/linux/commits/Andy-Shevchenko/serial-8250_pci-Replace-custom-pci_match_id-implementation/20211025-204752
> base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
> config: i386-randconfig-a003-20211025 (attached as .config)
> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project a461fa64bb37cffd73f683c74f6b0780379fc2ca)
> reproduce (this is a W=1 build):
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # https://github.com/0day-ci/linux/commit/24a32531ba63f472ec6f40c4d431cb5369b29818
> git remote add linux-review https://github.com/0day-ci/linux
> git fetch --no-tags linux-review Andy-Shevchenko/serial-8250_pci-Replace-custom-pci_match_id-implementation/20211025-204752
> git checkout 24a32531ba63f472ec6f40c4d431cb5369b29818
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> drivers/tty/serial/8250/8250_pci.c:1268:6: warning: variable 'amcc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> if (match)
> ^~~~~
> drivers/tty/serial/8250/8250_pci.c:1273:6: note: uninitialized use occurs here
> if (amcc) {
> ^~~~
> drivers/tty/serial/8250/8250_pci.c:1268:2: note: remove the 'if' if its condition is always true
> if (match)
> ^~~~~~~~~~
> drivers/tty/serial/8250/8250_pci.c:1265:11: note: initialize the variable 'amcc' to silence this warning
> bool amcc;
> ^
> = 0
Clang gives a right and wrong advice at the same time.
Thank you for the uninitialized case, but variable is boolean, what's 0 here?
I'll send a fix ASAP.
> 1 warning generated.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH v2 1/2] serial: 8250_pci: Replace custom pci_match_id() implementation
@ 2021-10-26 13:25 ` Andy Shevchenko
0 siblings, 0 replies; 8+ messages in thread
From: Andy Shevchenko @ 2021-10-26 13:25 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 2619 bytes --]
On Tue, Oct 26, 2021 at 08:45:48PM +0800, kernel test robot wrote:
> Hi Andy,
>
> I love your patch! Perhaps something to improve:
>
> [auto build test WARNING on tty/tty-testing]
> [cannot apply to v5.15-rc7 next-20211026]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
>
> url: https://github.com/0day-ci/linux/commits/Andy-Shevchenko/serial-8250_pci-Replace-custom-pci_match_id-implementation/20211025-204752
> base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
> config: i386-randconfig-a003-20211025 (attached as .config)
> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project a461fa64bb37cffd73f683c74f6b0780379fc2ca)
> reproduce (this is a W=1 build):
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # https://github.com/0day-ci/linux/commit/24a32531ba63f472ec6f40c4d431cb5369b29818
> git remote add linux-review https://github.com/0day-ci/linux
> git fetch --no-tags linux-review Andy-Shevchenko/serial-8250_pci-Replace-custom-pci_match_id-implementation/20211025-204752
> git checkout 24a32531ba63f472ec6f40c4d431cb5369b29818
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> drivers/tty/serial/8250/8250_pci.c:1268:6: warning: variable 'amcc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> if (match)
> ^~~~~
> drivers/tty/serial/8250/8250_pci.c:1273:6: note: uninitialized use occurs here
> if (amcc) {
> ^~~~
> drivers/tty/serial/8250/8250_pci.c:1268:2: note: remove the 'if' if its condition is always true
> if (match)
> ^~~~~~~~~~
> drivers/tty/serial/8250/8250_pci.c:1265:11: note: initialize the variable 'amcc' to silence this warning
> bool amcc;
> ^
> = 0
Clang gives a right and wrong advice at the same time.
Thank you for the uninitialized case, but variable is boolean, what's 0 here?
I'll send a fix ASAP.
> 1 warning generated.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH v2 1/2] serial: 8250_pci: Replace custom pci_match_id() implementation
2021-10-26 13:25 ` Andy Shevchenko
@ 2021-10-26 13:35 ` Andy Shevchenko
-1 siblings, 0 replies; 8+ messages in thread
From: Andy Shevchenko @ 2021-10-26 13:35 UTC (permalink / raw)
To: kernel test robot
Cc: linux-serial, linux-kernel, llvm, kbuild-all, Greg Kroah-Hartman,
Jiri Slaby
On Tue, Oct 26, 2021 at 04:25:58PM +0300, Andy Shevchenko wrote:
> On Tue, Oct 26, 2021 at 08:45:48PM +0800, kernel test robot wrote:
> > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386
> > >> drivers/tty/serial/8250/8250_pci.c:1268:6: warning: variable 'amcc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> > if (match)
> > ^~~~~
> > drivers/tty/serial/8250/8250_pci.c:1273:6: note: uninitialized use occurs here
> > if (amcc) {
> > ^~~~
> > drivers/tty/serial/8250/8250_pci.c:1268:2: note: remove the 'if' if its condition is always true
> > if (match)
> > ^~~~~~~~~~
> > drivers/tty/serial/8250/8250_pci.c:1265:11: note: initialize the variable 'amcc' to silence this warning
> > bool amcc;
> > ^
> > = 0
>
> Clang gives a right and wrong advice at the same time.
> Thank you for the uninitialized case, but variable is boolean, what's 0 here?
>
> I'll send a fix ASAP.
Hmm... GCC haven't showed anything here.
In any case, v3 has just been sent out.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH v2 1/2] serial: 8250_pci: Replace custom pci_match_id() implementation
@ 2021-10-26 13:35 ` Andy Shevchenko
0 siblings, 0 replies; 8+ messages in thread
From: Andy Shevchenko @ 2021-10-26 13:35 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 1237 bytes --]
On Tue, Oct 26, 2021 at 04:25:58PM +0300, Andy Shevchenko wrote:
> On Tue, Oct 26, 2021 at 08:45:48PM +0800, kernel test robot wrote:
> > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386
> > >> drivers/tty/serial/8250/8250_pci.c:1268:6: warning: variable 'amcc' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
> > if (match)
> > ^~~~~
> > drivers/tty/serial/8250/8250_pci.c:1273:6: note: uninitialized use occurs here
> > if (amcc) {
> > ^~~~
> > drivers/tty/serial/8250/8250_pci.c:1268:2: note: remove the 'if' if its condition is always true
> > if (match)
> > ^~~~~~~~~~
> > drivers/tty/serial/8250/8250_pci.c:1265:11: note: initialize the variable 'amcc' to silence this warning
> > bool amcc;
> > ^
> > = 0
>
> Clang gives a right and wrong advice at the same time.
> Thank you for the uninitialized case, but variable is boolean, what's 0 here?
>
> I'll send a fix ASAP.
Hmm... GCC haven't showed anything here.
In any case, v3 has just been sent out.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2021-10-26 14:47 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
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2021-10-26 14:47 [PATCH v2 1/2] serial: 8250_pci: Replace custom pci_match_id() implementation kernel test robot
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2021-10-25 12:45 Andy Shevchenko
2021-10-26 12:45 ` kernel test robot
2021-10-26 12:45 ` kernel test robot
2021-10-26 13:25 ` Andy Shevchenko
2021-10-26 13:25 ` Andy Shevchenko
2021-10-26 13:35 ` Andy Shevchenko
2021-10-26 13:35 ` Andy Shevchenko
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