dmaengine/dmatest: Terminate transfers on all channels in case of error or exit
Viresh Kumar [Fri, 29 Jul 2011 10:51:57 +0000 (15:51 +0530)]
In case, some error occurs while doing memcpy transfers, we must terminate all
transfers physically too. This is achieved by calling device_control() routine
with TERMINATE_ALL as parameter.

This is also required to be done in case module is removed while we are in
middle of some transfers.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/dmatest.c

index 765f5ff..accc184 100644 (file)
@@ -477,6 +477,8 @@ err_srcs:
        pr_notice("%s: terminating after %u tests, %u failures (status %d)\n",
                        thread_name, total_tests, failed_tests, ret);
 
+       /* terminate all transfers on specified channels */
+       chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
        if (iterations > 0)
                while (!kthread_should_stop()) {
                        DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit);
@@ -499,6 +501,10 @@ static void dmatest_cleanup_channel(struct dmatest_chan *dtc)
                list_del(&thread->node);
                kfree(thread);
        }
+
+       /* terminate all transfers on specified channels */
+       dtc->chan->device->device_control(dtc->chan, DMA_TERMINATE_ALL, 0);
+
        kfree(dtc);
 }