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staging: bcm2835-camera: fix timeout handling in wait_for_completion_timeout

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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: 7b3ad5abf0 ("staging: Import the BCM2835 MMAL-based V4L2 camera driver.")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nicholas Mc Guire 2018-07-21 15:20:28 +02:00 committed by Greg Kroah-Hartman
parent 1ef5c96081
commit b7afce51d9
1 changed files with 6 additions and 5 deletions
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11
drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c
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@ -630,6 +630,7 @@ static int send_synchronous_mmal_msg(struct vchiq_mmal_instance *instance,
{
struct mmal_msg_context *msg_context;
int ret;
unsigned long timeout;
/* payload size must not cause message to exceed max size */
if (payload_len >
@ -668,11 +669,11 @@ static int send_synchronous_mmal_msg(struct vchiq_mmal_instance *instance,
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;