linux-kernel - [PATCH] ieee1394: sbp2: fix sbp2_remove

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Message-ID: <tkrat.123975b91520704c@s5r6.in-berlin.de>
Date:	Sat, 11 Aug 2007 11:51:16 +0200 (CEST)
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	linux1394-devel@...ts.sourceforge.net
cc:	linux-kernel@...r.kernel.org, Olaf Hering <olh@...e.de>
Subject: [PATCH] ieee1394: sbp2: fix sbp2_remove_device for error cases

Date: 
From: Stefan Richter <stefanr@...6.in-berlin.de>
Subject: ieee1394: sbp2: fix sbp2_remove_device for error cases

Bug found by Olaf Hering <olh@...e.de>:
sbp2util_remove_command_orb_pool requires a valid lu->hi pointer.

Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de>
---
 drivers/ieee1394/sbp2.c |   14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

Index: linux/drivers/ieee1394/sbp2.c
===================================================================
--- linux.orig/drivers/ieee1394/sbp2.c
+++ linux/drivers/ieee1394/sbp2.c
@@ -513,9 +513,9 @@ static int sbp2util_create_command_orb_p
 	return 0;
 }
 
-static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu)
+static void sbp2util_remove_command_orb_pool(struct sbp2_lu *lu,
+					     struct hpsb_host *host)
 {
-	struct hpsb_host *host = lu->hi->host;
 	struct list_head *lh, *next;
 	struct sbp2_command_info *cmd;
 	unsigned long flags;
@@ -922,15 +922,16 @@ static void sbp2_remove_device(struct sb
 
 	if (!lu)
 		return;
-
 	hi = lu->hi;
+	if (!hi)
+		goto no_hi;
 
 	if (lu->shost) {
 		scsi_remove_host(lu->shost);
 		scsi_host_put(lu->shost);
 	}
 	flush_scheduled_work();
-	sbp2util_remove_command_orb_pool(lu);
+	sbp2util_remove_command_orb_pool(lu, hi->host);
 
 	list_del(&lu->lu_list);
 
@@ -971,9 +972,8 @@ static void sbp2_remove_device(struct sb
 
 	lu->ud->device.driver_data = NULL;
 
-	if (hi)
-		module_put(hi->host->driver->owner);
-
+	module_put(hi->host->driver->owner);
+no_hi:
 	kfree(lu);
 }
 

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

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