This is a note to let you know that I've just added the patch titled
cciss: Fix scsi tape io with more than 255 scatter gather elements
to the 3.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cciss-fix-scsi-tape-io-with-more-than-255-scatter-gather-elements.patch
and it can be found in the queue-3.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From bc67f63650fad6b3478d9ddfd5406d45a95987c9 Mon Sep 17 00:00:00 2001
From: "Stephen M. Cameron" <[email protected]>
Date: Thu, 22 Mar 2012 21:40:09 +0100
Subject: cciss: Fix scsi tape io with more than 255 scatter gather elements
From: "Stephen M. Cameron" <[email protected]>
commit bc67f63650fad6b3478d9ddfd5406d45a95987c9 upstream.
The total number of scatter gather elements in the CISS command
used by the scsi tape code was being cast to a u8, which can hold
at most 255 scatter gather elements. It should have been cast to
a u16. Without this patch the command gets rejected by the controller
since the total scatter gather count did not add up to the right
value resulting in an i/o error.
Signed-off-by: Stephen M. Cameron <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/block/cciss_scsi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -1411,7 +1411,7 @@ static void cciss_scatter_gather(ctlr_in
/* track how many SG entries we are using */
if (request_nsgs > h->maxSG)
h->maxSG = request_nsgs;
- c->Header.SGTotal = (__u8) request_nsgs + chained;
+ c->Header.SGTotal = (u16) request_nsgs + chained;
if (request_nsgs > h->max_cmd_sgentries)
c->Header.SGList = h->max_cmd_sgentries;
else
Patches currently in stable-queue which might be from
[email protected] are
queue-3.2/cciss-initialize-scsi-host-max_sectors-for-tape-drive-support.patch
queue-3.2/cciss-fix-scsi-tape-io-with-more-than-255-scatter-gather-elements.patch
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