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| author | Andres Salomon <dilinger@queued.net> | 2008-07-12 22:47:54 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-12 23:33:41 +0200 |
| commit | bca5c2c550f16d2dc2d21ffb7b4712bd0a7d32a9 (patch) | |
| tree | 5f37f9e04821f71443ca8b6a8d08a0006a1b895e | |
| parent | serial8250: sanity check nr_uarts on all paths. (diff) | |
| download | linux-bca5c2c550f16d2dc2d21ffb7b4712bd0a7d32a9.tar.xz linux-bca5c2c550f16d2dc2d21ffb7b4712bd0a7d32a9.zip | |
ov7670: clean up ov7670_read semantics
Cortland Setlow pointed out a bug in ov7670.c where the result from
ov7670_read() was just being checked for !0, rather than <0. This made me
realize that ov7670_read's semantics were rather confusing; it both fills
in 'value' with the result, and returns it. This is goes against general
kernel convention; so rather than fixing callers, let's fix the function.
This makes ov7670_read return <0 in the case of an error, and 0 upon
success. Thus, code like:
res = ov7670_read(...);
if (!res)
goto error;
..will work properly.
Signed-off-by: Cortland Setlow <csetlow@tower-research.com>
Signed-off-by: Andres Salomon <dilinger@debian.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/media/video/ov7670.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/media/video/ov7670.c b/drivers/media/video/ov7670.c index 2bc6bdc9c1f2..d7bfd30f74a9 100644 --- a/drivers/media/video/ov7670.c +++ b/drivers/media/video/ov7670.c @@ -406,8 +406,10 @@ static int ov7670_read(struct i2c_client *c, unsigned char reg, int ret; ret = i2c_smbus_read_byte_data(c, reg); - if (ret >= 0) + if (ret >= 0) { *value = (unsigned char) ret; + ret = 0; + } return ret; } |