linux-kernel - [PATCH] fix crash in sbp2_remove_device() when dma_set

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Date:	Mon, 6 Aug 2007 14:20:59 +0200
From:	Olaf Hering <olh@...e.de>
To:	Stefan Richter <stefanr@...6.in-berlin.de>,
	linux1394-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [PATCH] fix crash in sbp2_remove_device() when dma_set_mask() fails

Fix crash in sbp2_remove_device() when dma_set_mask() fails.

Signed-off-by: Olaf Hering <olh@...e.de>

---
 drivers/ieee1394/sbp2.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -929,13 +929,14 @@ static void sbp2_remove_device(struct sb
 	if (!lu)
 		return;
 
-	hi = lu->hi;
-
 	if (lu->shost) {
 		scsi_remove_host(lu->shost);
 		scsi_host_put(lu->shost);
 	}
 	flush_scheduled_work();
+	hi = lu->hi;
+	if (!hi)
+		return;
 	sbp2util_remove_command_orb_pool(lu);
 
 	list_del(&lu->lu_list);
@@ -977,8 +978,7 @@ 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);
 
 	kfree(lu);
 }
-
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