4.14-stable review patch. If anyone has any objections, please let me know.
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From: Nicholas Mc Guire hofrat@osadl.org
[ Upstream commit b7afce51d95726a619743aaad8870db66dfa1479 ]
wait_for_completion_timeout returns unsigned long not int so a variable of proper type is introduced. Further the check for <= 0 is ambiguous and should be == 0 here indicating timeout which is the only error case so no additional check needed here.
Signed-off-by: Nicholas Mc Guire hofrat@osadl.org Fixes: 7b3ad5abf027 ("staging: Import the BCM2835 MMAL-based V4L2 camera driver.") Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)
--- a/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c +++ b/drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c @@ -834,6 +834,7 @@ static int send_synchronous_mmal_msg(str { struct mmal_msg_context *msg_context; int ret; + unsigned long timeout;
/* payload size must not cause message to exceed max size */ if (payload_len > @@ -872,11 +873,11 @@ static int send_synchronous_mmal_msg(str return ret; }
- ret = wait_for_completion_timeout(&msg_context->u.sync.cmplt, 3 * HZ); - if (ret <= 0) { - pr_err("error %d waiting for sync completion\n", ret); - if (ret == 0) - ret = -ETIME; + timeout = wait_for_completion_timeout(&msg_context->u.sync.cmplt, + 3 * HZ); + if (timeout == 0) { + pr_err("timed out waiting for sync completion\n"); + ret = -ETIME; /* todo: what happens if the message arrives after aborting */ release_msg_context(msg_context); return ret;