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authorMauro Carvalho Chehab <mchehab@s-opensource.com>2017-12-19 12:43:37 +0100
committerMauro Carvalho Chehab <mchehab@s-opensource.com>2018-03-07 11:55:05 +0100
commit39ad07b7de82bff26118a69e680cda3d081392dc (patch)
tree4bbefdbe7e13e6008cc0f8092afedc652c5c6c16 /drivers/media/i2c
parentmedia: cxd2880: remove unused vars (diff)
downloadlinux-39ad07b7de82bff26118a69e680cda3d081392dc.tar.xz
linux-39ad07b7de82bff26118a69e680cda3d081392dc.zip
media: s5c73m3-core: fix logic on a timeout condition
As warned by smatch: drivers/media/i2c/s5c73m3/s5c73m3-core.c:268 s5c73m3_check_status() error: uninitialized symbol 'status'. if s5c73m3_check_status() is called too late, time_is_after_jiffies(end) will return 0, causing the while to abort before reading status. The current code will do the wrong thing here, as it will still check if status != value. The right fix here is to change the logic to ensure that it will always read the status. Suggested-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media/i2c')
-rw-r--r--drivers/media/i2c/s5c73m3/s5c73m3-core.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/media/i2c/s5c73m3/s5c73m3-core.c b/drivers/media/i2c/s5c73m3/s5c73m3-core.c
index cdc4f2392ef9..ce196b60f917 100644
--- a/drivers/media/i2c/s5c73m3/s5c73m3-core.c
+++ b/drivers/media/i2c/s5c73m3/s5c73m3-core.c
@@ -248,17 +248,17 @@ static int s5c73m3_check_status(struct s5c73m3 *state, unsigned int value)
{
unsigned long start = jiffies;
unsigned long end = start + msecs_to_jiffies(2000);
- int ret = 0;
+ int ret;
u16 status;
int count = 0;
- while (time_is_after_jiffies(end)) {
+ do {
ret = s5c73m3_read(state, REG_STATUS, &status);
if (ret < 0 || status == value)
break;
usleep_range(500, 1000);
++count;
- }
+ } while (time_is_after_jiffies(end));
if (count > 0)
v4l2_dbg(1, s5c73m3_dbg, &state->sensor_sd,