linux-kernel - [patch] cciss: Fix problem that deleting multiple logical drives could cause a panic

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Date:	Tue, 16 Dec 2008 14:17:03 -0600
From:	scameron@...rdog.cca.cpqcorp.net
To:	linux-kernel@...r.kernel.org
Cc:	jens.axboe@...cle.com, akpm@...ux-foundation.org,
	mikem@...dking.cca.cpqcorp.net
Subject: [patch] cciss: Fix problem that deleting multiple logical drives could cause a panic


Fix problem that deleting multiple logical drives could cause a panic.

Signed-off-by: Stephen M. Cameron <scameron@...rdog.cca.cpqcorp.net>
---

 drivers/block/cciss.c |    5 +++++
 1 file changed, 5 insertions(+)

diff -puN drivers/block/cciss.c~fix_rebuild_lun_table_bug drivers/block/cciss.c
--- linux-2.6.28-rc8/drivers/block/cciss.c~fix_rebuild_lun_table_bug	2008-12-16 14:00:52.000000000 -0600
+++ linux-2.6.28-rc8-root/drivers/block/cciss.c	2008-12-16 14:00:52.000000000 -0600
@@ -1693,6 +1693,11 @@ static int rebuild_lun_table(ctlr_info_t
 	for (i = 0; i <= h->highest_lun; i++) {
 		int j;
 		drv_found = 0;
+
+		/* skip holes in the array from already deleted drives */
+		if (h->drv[i].raid_level == -1)
+			continue;
+
 		for (j = 0; j < num_luns; j++) {
 			memcpy(&lunid, &ld_buff->LUN[j][0], 4);
 			lunid = le32_to_cpu(lunid);
_
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