4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nicholas Mc Guire <hofrat@xxxxxxxxx>
[ 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@xxxxxxxxx>
Fixes: 7b3ad5abf027 ("staging: Import the BCM2835 MMAL-based V4L2 camera driver.")
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -630,6 +630,7 @@ 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 >
@@ -668,11 +669,11 @@ 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;
