linux-kernel - [PATCH 3/4] I/OAT: fix async

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Message-ID: <20081107114642.25190.49701.stgit@linux.site>
Date:	Fri, 07 Nov 2008 12:46:55 +0100
From:	Maciej Sosnowski <maciej.sosnowski@...el.com>
To:	dan.j.williams@...el.com
Cc:	tom.s.picard@...el.com, mark_rustad@...tech.com,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	stable@...nel.org
Subject: [PATCH 3/4] I/OAT: fix async_tx.callback checking

From: Maciej Sosnowski <maciej.sosnowski@...el.com>

async_tx.callback should be checked for the first
not the last descriptor in the chain.

Cc: <stable@...nel.org>
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@...el.com>
---

 drivers/dma/ioat_dma.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c
index 687eef7..c5af17a 100644
--- a/drivers/dma/ioat_dma.c
+++ b/drivers/dma/ioat_dma.c
@@ -525,7 +525,7 @@ static dma_cookie_t ioat1_tx_submit(stru
 	}
 
 	hw->ctl = IOAT_DMA_DESCRIPTOR_CTL_CP_STS;
-	if (new->async_tx.callback) {
+	if (first->async_tx.callback) {
 		hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_INT_GN;
 		if (first != new) {
 			/* move callback into to last desc */
@@ -617,7 +617,7 @@ static dma_cookie_t ioat2_tx_submit(stru
 	}
 
 	hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_CP_STS;
-	if (new->async_tx.callback) {
+	if (first->async_tx.callback) {
 		hw->ctl |= IOAT_DMA_DESCRIPTOR_CTL_INT_GN;
 		if (first != new) {
 			/* move callback into to last desc */

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