diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2018-09-26 08:51:01 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-10-05 11:04:39 -0400 |
| commit | 146c45ef1fec3e3217b78c5a606efe41150301ea (patch) | |
| tree | 7bf10052bebedea5c508f9769b23444e85f22513 /drivers/media | |
| parent | 370d8e2a7570adb46ab5d90b19292c5c40129e24 (diff) | |
| download | linux-146c45ef1fec3e3217b78c5a606efe41150301ea.tar.bz2 | |
media: ov9650: avoid maybe-uninitialized warnings
The regmap change causes multiple warnings like
drivers/media/i2c/ov9650.c: In function 'ov965x_g_volatile_ctrl':
drivers/media/i2c/ov9650.c:889:29: error: 'reg2' may be used uninitialized in this function [-Werror=maybe-uninitialized]
exposure = ((reg2 & 0x3f) << 10) | (reg1 << 2) |
~~~~~~~~~~~~~~~^~~~~~
It is apparently hard for the compiler to see here if ov965x_read()
returned successfully or not. Besides, we have a v4l2_dbg() statement
that prints an uninitialized value if regmap_read() fails.
Adding an 'else' clause avoids the ambiguity.
Fixes: 361f3803adfe ("media: ov9650: use SCCB regmap")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/i2c/ov9650.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/media/i2c/ov9650.c b/drivers/media/i2c/ov9650.c index 3c9e6798d14b..f0587c0c0a72 100644 --- a/drivers/media/i2c/ov9650.c +++ b/drivers/media/i2c/ov9650.c @@ -433,6 +433,8 @@ static int ov965x_read(struct ov965x *ov965x, u8 addr, u8 *val) ret = regmap_read(ov965x->regmap, addr, &buf); if (!ret) *val = buf; + else + *val = -1; v4l2_dbg(2, debug, &ov965x->sd, "%s: 0x%02x @ 0x%02x. (%d)\n", __func__, *val, addr, ret); |