ASoC: Silence DEBUG_STRICT_USER_COPY_CHECKS=y warning
Enabling DEBUG_STRICT_USER_COPY_CHECKS causes the following
warning:
In file included from arch/x86/include/asm/uaccess.h:573,
from include/linux/poll.h:14,
from include/sound/pcm.h:29,
from include/sound/ac97_codec.h:31,
from sound/soc/soc-core.c:34:
In function 'copy_from_user',
inlined from 'codec_reg_write_file' at
sound/soc/soc-core.c:252:
arch/x86/include/asm/uaccess_64.h:65:
warning: call to 'copy_from_user_overflow' declared with
attribute warning: copy_from_user() buffer size is not provably
correct
presumably due to buf_size being signed causing GCC to fail to
see that buf_size can't become negative.
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index c1a4cf4..5968745 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -242,7 +242,7 @@
const char __user *user_buf, size_t count, loff_t *ppos)
{
char buf[32];
- int buf_size;
+ size_t buf_size;
char *start = buf;
unsigned long reg, value;
int step = 1;