From 6497dcffe07b7c3d863f9899280c4f6eae999161 Mon Sep 17 00:00:00 2001 From: Dan Williams <dan.j.williams@intel.com> Date: Sat, 1 Mar 2008 07:52:14 -0700 Subject: [PATCH] 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 --- drivers/dma/ioat_dma.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c index dff38accc5c1..4017d9e7acd2 100644 --- a/drivers/dma/ioat_dma.c +++ b/drivers/dma/ioat_dma.c @@ -714,6 +714,7 @@ static struct dma_async_tx_descriptor *ioat1_dma_prep_memcpy( new->len = len; new->dst = dma_dest; new->src = dma_src; + new->async_tx.ack = 0; return &new->async_tx; } else return NULL; @@ -741,6 +742,7 @@ static struct dma_async_tx_descriptor *ioat2_dma_prep_memcpy( new->len = len; new->dst = dma_dest; new->src = dma_src; + new->async_tx.ack = 0; return &new->async_tx; } else return NULL; -- 2.20.1