This is a note to let you know that I've just added the patch titled
mwifiex: check wait_event_interruptible return value
to the 3.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mwifiex-check-wait_event_interruptible-return-value.patch
and it can be found in the queue-3.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 9c969d8ccb1e17bd20742f4ac9f00c1a64487234 Mon Sep 17 00:00:00 2001
From: Bing Zhao <[email protected]>
Date: Wed, 2 Jan 2013 16:07:35 -0800
Subject: mwifiex: check wait_event_interruptible return value
From: Bing Zhao <[email protected]>
commit 9c969d8ccb1e17bd20742f4ac9f00c1a64487234 upstream.
wait_event_interruptible function returns -ERESTARTSYS if it's
interrupted by a signal. Driver should check the return value
and handle this case properly.
In mwifiex_wait_queue_complete() routine, as we are now checking
wait_event_interruptible return value, the condition check is not
required. Also, we have removed mwifiex_cancel_pending_ioctl()
call to avoid a chance of sending second command to FW by other path
as soon as we clear current command node. FW can not handle two
commands simultaneously.
Signed-off-by: Bing Zhao <[email protected]>
Signed-off-by: Amitkumar Karwar <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/wireless/mwifiex/sta_ioctl.c | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)
--- a/drivers/net/wireless/mwifiex/sta_ioctl.c
+++ b/drivers/net/wireless/mwifiex/sta_ioctl.c
@@ -56,7 +56,6 @@ int mwifiex_copy_mcast_addr(struct mwifi
*/
int mwifiex_wait_queue_complete(struct mwifiex_adapter *adapter)
{
- bool cancel_flag = false;
int status;
struct cmd_ctrl_node *cmd_queued;
@@ -70,14 +69,11 @@ int mwifiex_wait_queue_complete(struct m
atomic_inc(&adapter->cmd_pending);
/* Wait for completion */
- wait_event_interruptible(adapter->cmd_wait_q.wait,
- *(cmd_queued->condition));
- if (!*(cmd_queued->condition))
- cancel_flag = true;
-
- if (cancel_flag) {
- mwifiex_cancel_pending_ioctl(adapter);
- dev_dbg(adapter->dev, "cmd cancel\n");
+ status = wait_event_interruptible(adapter->cmd_wait_q.wait,
+ *(cmd_queued->condition));
+ if (status) {
+ dev_err(adapter->dev, "cmd_wait_q terminated: %d\n", status);
+ return status;
}
status = adapter->cmd_wait_q.status;
@@ -480,8 +476,11 @@ int mwifiex_enable_hs(struct mwifiex_ada
return false;
}
- wait_event_interruptible(adapter->hs_activate_wait_q,
- adapter->hs_activate_wait_q_woken);
+ if (wait_event_interruptible(adapter->hs_activate_wait_q,
+ adapter->hs_activate_wait_q_woken)) {
+ dev_err(adapter->dev, "hs_activate_wait_q terminated\n");
+ return false;
+ }
return true;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.7/mwifiex-check-wait_event_interruptible-return-value.patch
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