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authorJon Mason <jon.mason@intel.com>2012-11-12 03:03:20 +0400
committerVinod Koul <vinod.koul@intel.com>2013-01-08 10:05:05 +0400
commit944ea4dd38b8575e30a5699633c81945bff1864d (patch)
tree7883205efd57c7c1e95ad2cb2bed59bde165ecc8 /drivers/dma/dmatest.c
parente4d43c1764bc3ee1150f24e530db2b5b23e91425 (diff)
downloadlinux-944ea4dd38b8575e30a5699633c81945bff1864d.tar.xz
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 <jon.mason@intel.com> CC: Vinod Koul <vinod.koul@intel.com> CC: Dan Williams <djbw@fb.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Diffstat (limited to 'drivers/dma/dmatest.c')
-rw-r--r--drivers/dma/dmatest.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 3a8047b1f108..99a75e5d66be 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);
}