* [kbuild] drivers/spi/spi-cadence-quadspi.c:250:18: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour
@ 2021-03-02 12:11 ` Dan Carpenter
0 siblings, 0 replies; 3+ messages in thread
From: Dan Carpenter @ 2021-03-02 12:11 UTC (permalink / raw)
To: kbuild, Ramuthevar Vadivel Murugan
Cc: lkp, kbuild-all, linux-kernel, Mark Brown, Vignesh Raghavendra,
Tudor Ambarus
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 7a7fd0de4a9804299793e564a555a49c1fc924cb
commit: 31fb632b5d43ca16713095b3a4fe17e3d7331e28 spi: Move cadence-quadspi driver to drivers/spi/
compiler: nds32le-linux-gcc (GCC) 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>
cppcheck possible warnings: (new ones prefixed by >>, may not real problems)
>> drivers/spi/spi-cadence-quadspi.c:250:18: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned]
return reg & (1 << CQSPI_REG_CONFIG_IDLE_LSB);
vim +250 drivers/spi/spi-cadence-quadspi.c
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 246 static bool cqspi_is_idle(struct cqspi_st *cqspi)
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 247 {
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 248 u32 reg = readl(cqspi->iobase + CQSPI_REG_CONFIG);
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 249
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 @250 return reg & (1 << CQSPI_REG_CONFIG_IDLE_LSB);
^^^^^^^^^^^^^^^^^^^^^^^^^
CQSPI_REG_CONFIG_IDLE_LSB is 31 and reg is a u32 so this is very
puzzling.
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 251 }
---
0-DAY CI Kernel Test Service, Intel Corporation
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^ permalink raw reply [flat|nested] 3+ messages in thread
* drivers/spi/spi-cadence-quadspi.c:250:18: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour
@ 2021-03-02 12:11 ` Dan Carpenter
0 siblings, 0 replies; 3+ messages in thread
From: Dan Carpenter @ 2021-03-02 12:11 UTC (permalink / raw)
To: kbuild
[-- Attachment #1: Type: text/plain, Size: 1912 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 7a7fd0de4a9804299793e564a555a49c1fc924cb
commit: 31fb632b5d43ca16713095b3a4fe17e3d7331e28 spi: Move cadence-quadspi driver to drivers/spi/
compiler: nds32le-linux-gcc (GCC) 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>
cppcheck possible warnings: (new ones prefixed by >>, may not real problems)
>> drivers/spi/spi-cadence-quadspi.c:250:18: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned]
return reg & (1 << CQSPI_REG_CONFIG_IDLE_LSB);
vim +250 drivers/spi/spi-cadence-quadspi.c
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 246 static bool cqspi_is_idle(struct cqspi_st *cqspi)
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 247 {
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 248 u32 reg = readl(cqspi->iobase + CQSPI_REG_CONFIG);
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 249
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 @250 return reg & (1 << CQSPI_REG_CONFIG_IDLE_LSB);
^^^^^^^^^^^^^^^^^^^^^^^^^
CQSPI_REG_CONFIG_IDLE_LSB is 31 and reg is a u32 so this is very
puzzling.
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 251 }
---
0-DAY CI Kernel Test Service, Intel Corporation
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^ permalink raw reply [flat|nested] 3+ messages in thread
* [kbuild] drivers/spi/spi-cadence-quadspi.c:250:18: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour
@ 2021-03-02 12:11 ` Dan Carpenter
0 siblings, 0 replies; 3+ messages in thread
From: Dan Carpenter @ 2021-03-02 12:11 UTC (permalink / raw)
To: kbuild-all
[-- Attachment #1: Type: text/plain, Size: 1912 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 7a7fd0de4a9804299793e564a555a49c1fc924cb
commit: 31fb632b5d43ca16713095b3a4fe17e3d7331e28 spi: Move cadence-quadspi driver to drivers/spi/
compiler: nds32le-linux-gcc (GCC) 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>
cppcheck possible warnings: (new ones prefixed by >>, may not real problems)
>> drivers/spi/spi-cadence-quadspi.c:250:18: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned]
return reg & (1 << CQSPI_REG_CONFIG_IDLE_LSB);
vim +250 drivers/spi/spi-cadence-quadspi.c
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 246 static bool cqspi_is_idle(struct cqspi_st *cqspi)
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 247 {
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 248 u32 reg = readl(cqspi->iobase + CQSPI_REG_CONFIG);
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 249
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 @250 return reg & (1 << CQSPI_REG_CONFIG_IDLE_LSB);
^^^^^^^^^^^^^^^^^^^^^^^^^
CQSPI_REG_CONFIG_IDLE_LSB is 31 and reg is a u32 so this is very
puzzling.
14062341053690 drivers/mtd/spi-nor/cadence-quadspi.c Graham Moore 2016-06-04 251 }
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-03-02 12:11 [kbuild] drivers/spi/spi-cadence-quadspi.c:250:18: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour Dan Carpenter
2021-03-02 12:11 ` Dan Carpenter
2021-03-02 12:11 ` Dan Carpenter
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