From 944ea4dd38b8575e30a5699633c81945bff1864d Mon Sep 17 00:00:00 2001 From: Jon Mason Date: Sun, 11 Nov 2012 23:03:20 +0000 Subject: dmatest: Fix NULL pointer dereference on ioat device_control is an optional and not implemented in all DMA drivers. Any calls to these will result in a NULL pointer dereference. dmatest makes two of these calls when completing the kernel thread and removing the module. These are corrected by calling the dmaengine_device_control wrapper and checking for a non-existant device_control function pointer there. Signed-off-by: Jon Mason CC: Vinod Koul CC: Dan Williams Reviewed-by: Viresh Kumar Signed-off-by: Vinod Koul --- drivers/dma/dmatest.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index 3a8047b1f10..99a75e5d66b 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -536,7 +536,7 @@ err_srcs: thread_name, total_tests, failed_tests, ret); /* terminate all transfers on specified channels */ - chan->device->device_control(chan, DMA_TERMINATE_ALL, 0); + dmaengine_terminate_all(chan); if (iterations > 0) while (!kthread_should_stop()) { DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit); @@ -561,7 +561,7 @@ static void dmatest_cleanup_channel(struct dmatest_chan *dtc) } /* terminate all transfers on specified channels */ - dtc->chan->device->device_control(dtc->chan, DMA_TERMINATE_ALL, 0); + dmaengine_terminate_all(dtc->chan); kfree(dtc); } -- cgit v1.2.3-70-g09d2