mwifiex: fix hung task on command timeout

Sometimes when command timeout occurs due to a firmware or
hardware bug, there may be some synchronous commands in command
queue. These commands are never downloaded to firmware causing
hung task warnings. This patch replaces wait_event_interruptible
call with wait_event_interruptible_timeout to fix the issue.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/mwifiex/sta_ioctl.c b/drivers/net/wireless/mwifiex/sta_ioctl.c
index 8942706..536c14a 100644 (file)
--- a/drivers/net/wireless/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/mwifiex/sta_ioctl.c
@@ -60,9 +60,10 @@ int mwifiex_wait_queue_complete(struct mwifiex_adapter *adapter,
        int status;
 
        /* Wait for completion */
-       status = wait_event_interruptible(adapter->cmd_wait_q.wait,
-                                         *(cmd_queued->condition));
-       if (status) {
+       status = wait_event_interruptible_timeout(adapter->cmd_wait_q.wait,
+                                                 *(cmd_queued->condition),
+                                                 (12 * HZ));
+       if (status <= 0) {
                dev_err(adapter->dev, "cmd_wait_q terminated: %d\n", status);
                mwifiex_cancel_all_pending_cmd(adapter);
                return status;