From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 4 Mar 2013 09:09:25 +0000 (+0200)
Subject: dmatest: cancel thread immediately when asked for
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=77101ce578bb365e44c2944d6c338c68206e6e10;p=linux-beck.git

dmatest: cancel thread immediately when asked for

If user have the timeout alike issues and wants to cancel the thread
immediately, the current call of wait_event_freezable_timeout is preventing to
this until timeout is expired. Thus, user will experience the unnecessary
delays.

Adding kthread_should_stop() check inside wait_event_freezable_timeout() solves
that.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
---

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index a2c8904b63ea..e6b4cfa1eb7f 100644
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -454,7 +454,8 @@ static int dmatest_func(void *data)
 		}
 		dma_async_issue_pending(chan);
 
-		wait_event_freezable_timeout(done_wait, done.done,
+		wait_event_freezable_timeout(done_wait,
+					     done.done || kthread_should_stop(),
 					     msecs_to_jiffies(timeout));
 
 		status = dma_async_is_tx_complete(chan, cookie, NULL, NULL);