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-rw-r--r--drivers/dma/ioat/dma.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c
index f66b7e640610..1d5df2ef148b 100644
--- a/drivers/dma/ioat/dma.c
+++ b/drivers/dma/ioat/dma.c
@@ -197,7 +197,8 @@ static void __ioat_start_null_desc(struct ioatdma_chan *ioat_chan)
void ioat_start_null_desc(struct ioatdma_chan *ioat_chan)
{
spin_lock_bh(&ioat_chan->prep_lock);
- __ioat_start_null_desc(ioat_chan);
+ if (!test_bit(IOAT_CHAN_DOWN, &ioat_chan->state))
+ __ioat_start_null_desc(ioat_chan);
spin_unlock_bh(&ioat_chan->prep_lock);
}