linux-kernel - [PATCH 1/3 2.6.24-rc1-gitX] ieee1394: iso and async streams: s/g list fix

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Date:	Sun, 4 Nov 2007 13:08:36 +0100 (CET)
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	linux1394-devel@...ts.sourceforge.net
cc:	Jens Axboe <jens.axboe@...cle.com>,
	Torsten Kaiser <just.for.lkml@...glemail.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/3 2.6.24-rc1-gitX] ieee1394: iso and async streams: s/g list
 fix

Date: Sun, 4 Nov 2007 09:44:56 +0100
From: Jens Axboe <jens.axboe@...cle.com>

Torsten Kaiser wrote:
> Looking that calltrace upwards, it seems replacing the
> memset(dma->sglist,...) with sg_init_table(...) would fix the BUG_ON()
> as that inits the SG_MAGIC.

Tested-by: Torsten Kaiser <just.for.lkml@...glemail.com>
Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de>
---
 drivers/ieee1394/dma.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Index: linux-2.6.24-rc1/drivers/ieee1394/dma.c
===================================================================
--- linux-2.6.24-rc1.orig/drivers/ieee1394/dma.c
+++ linux-2.6.24-rc1/drivers/ieee1394/dma.c
@@ -103,8 +103,7 @@ int dma_region_alloc(struct dma_region *
 		goto err;
 	}
 
-	/* just to be safe - this will become unnecessary once sglist->address goes away */
-	memset(dma->sglist, 0, dma->n_pages * sizeof(*dma->sglist));
+	sg_init_table(dma->sglist, dma->n_pages);
 
 	/* fill scatter/gather list with pages */
 	for (i = 0; i < dma->n_pages; i++) {

-- 
Stefan Richter
-=====-=-=== =-== --=--
http://arcgraph.de/sr/

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