diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2019-02-19 12:01:56 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-03-19 13:58:30 -0400 |
| commit | 03aa4f191a36f33fce015387f84efa0eee94408e (patch) | |
| tree | dbbe51a040a7acd4b69cd22e4abef787e344cd2a | |
| parent | d30c4ffc06113d280fd7b5294ab384658a70c1f1 (diff) | |
media: saa7146: avoid high stack usage with clang
Two saa7146/hexium files contain a construct that causes a warning
when built with clang:
drivers/media/pci/saa7146/hexium_orion.c:210:12: error: stack frame size of 2272 bytes in function 'hexium_probe'
[-Werror,-Wframe-larger-than=]
static int hexium_probe(struct saa7146_dev *dev)
^
drivers/media/pci/saa7146/hexium_gemini.c:257:12: error: stack frame size of 2304 bytes in function 'hexium_attach'
[-Werror,-Wframe-larger-than=]
static int hexium_attach(struct saa7146_dev *dev, struct saa7146_pci_extension_data *info)
^
This one happens regardless of KASAN, and the problem is that a
constructor to initialize a dynamically allocated structure leads
to a copy of that structure on the stack, whereas gcc initializes
it in place.
Link: https://bugs.llvm.org/show_bug.cgi?id=40776
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: fix checkpatch warnings]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
| -rw-r--r-- | drivers/media/pci/saa7146/hexium_gemini.c | 5 | ||||
| -rw-r--r-- | drivers/media/pci/saa7146/hexium_orion.c | 5 |
2 files changed, 4 insertions, 6 deletions
diff --git a/drivers/media/pci/saa7146/hexium_gemini.c b/drivers/media/pci/saa7146/hexium_gemini.c index 5817d9cde4d0..6d8e4afe9673 100644 --- a/drivers/media/pci/saa7146/hexium_gemini.c +++ b/drivers/media/pci/saa7146/hexium_gemini.c @@ -270,9 +270,8 @@ static int hexium_attach(struct saa7146_dev *dev, struct saa7146_pci_extension_d /* enable i2c-port pins */ saa7146_write(dev, MC1, (MASK_08 | MASK_24 | MASK_10 | MASK_26)); - hexium->i2c_adapter = (struct i2c_adapter) { - .name = "hexium gemini", - }; + strscpy(hexium->i2c_adapter.name, "hexium gemini", + sizeof(hexium->i2c_adapter.name)); saa7146_i2c_adapter_prepare(dev, &hexium->i2c_adapter, SAA7146_I2C_BUS_BIT_RATE_480); if (i2c_add_adapter(&hexium->i2c_adapter) < 0) { DEB_S("cannot register i2c-device. skipping.\n"); diff --git a/drivers/media/pci/saa7146/hexium_orion.c b/drivers/media/pci/saa7146/hexium_orion.c index 0a05176c18ab..a794f9e5f990 100644 --- a/drivers/media/pci/saa7146/hexium_orion.c +++ b/drivers/media/pci/saa7146/hexium_orion.c @@ -231,9 +231,8 @@ static int hexium_probe(struct saa7146_dev *dev) saa7146_write(dev, DD1_STREAM_B, 0x00000000); saa7146_write(dev, MC2, (MASK_09 | MASK_25 | MASK_10 | MASK_26)); - hexium->i2c_adapter = (struct i2c_adapter) { - .name = "hexium orion", - }; + strscpy(hexium->i2c_adapter.name, "hexium orion", + sizeof(hexium->i2c_adapter.name)); saa7146_i2c_adapter_prepare(dev, &hexium->i2c_adapter, SAA7146_I2C_BUS_BIT_RATE_480); if (i2c_add_adapter(&hexium->i2c_adapter) < 0) { DEB_S("cannot register i2c-device. skipping.\n"); |