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mwifiex: check wait_event_interruptible return value 

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.

Cc: "3.6+" <stable@vger.kernel.org>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bing Zhao 2013-01-02 16:07:35 -08:00 committed by John W. Linville
parent a910c9cab6
commit 9c969d8ccb
1 changed files with 10 additions and 11 deletions
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21
drivers/net/wireless/mwifiex/sta_ioctl.c
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@ -56,7 +56,6 @@ int mwifiex_copy_mcast_addr(struct mwifiex_multicast_list *mlist,
*/
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 mwifiex_adapter *adapter)
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;
@ -496,8 +492,11 @@ int mwifiex_enable_hs(struct mwifiex_adapter *adapter)
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;
}