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ioat: fix 'ack' handling, driver must ensure that 'ack' is zero
Initialize 'ack' to zero in case the descriptor has been recycled. Prevents "kernel BUG at crypto/async_tx/async_xor.c:185!" Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Shannon Nelson <shannon.nelson@intel.com> Cc: stable@kernel.org
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1 changed files with 2 additions and 0 deletions
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@ -714,6 +714,7 @@ static struct dma_async_tx_descriptor *ioat1_dma_prep_memcpy(
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new->len = len;
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new->dst = dma_dest;
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new->src = dma_src;
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new->async_tx.ack = 0;
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return &new->async_tx;
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} else
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return NULL;
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@ -741,6 +742,7 @@ static struct dma_async_tx_descriptor *ioat2_dma_prep_memcpy(
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new->len = len;
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new->dst = dma_dest;
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new->src = dma_src;
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new->async_tx.ack = 0;
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return &new->async_tx;
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} else
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return NULL;
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