linux-kernel - [BUGFIX 2/2] gdth: bugfix for the Timer at exit crash

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Message-ID: <47B1DA2A.1060904@panasas.com>
Date:	Tue, 12 Feb 2008 19:40:58 +0200
From:	Boaz Harrosh <bharrosh@...asas.com>
To:	Sven Köhler <skoehler@....de>,
	Christoph Hellwig <hch@...radead.org>,
	Jeff Garzik <jeff@...zik.org>
CC:	linux-scsi <linux-scsi@...r.kernel.org>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	linux-kernel@...r.kernel.org, Joerg Dorchain <joerg@...chain.net>,
	Jon Chelton <jchelton@...global.com>,
	Stefan Priebe - allied internet ag 
	<s.priebe@...ied-internet.ag>
Subject: [BUGFIX 2/2] gdth: bugfix for the Timer at exit crash


gdth _exit would first remove all cards then stop the timer
and would not sync with the timer function. This caused a crash
in gdth_timer() when module was unloaded.

del_timer_sync the timer before we delete the cards.

NOT YET TESTED

Signed-off-by: Boaz Harrosh <bharrosh@...asas.com>
---
 drivers/scsi/gdth.c |   15 ++++++++-------
 1 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
index 8eb78be..103280e 100644
--- a/drivers/scsi/gdth.c
+++ b/drivers/scsi/gdth.c
@@ -3793,6 +3793,8 @@ static void gdth_timeout(ulong data)
     gdth_ha_str *ha;
     ulong flags;
 
+    BUG_ON(list_empty(&gdth_instances));
+
     ha = list_first_entry(&gdth_instances, gdth_ha_str, list);
     spin_lock_irqsave(&ha->smp_lock, flags);
 
@@ -5146,8 +5148,6 @@ static void gdth_remove_one(gdth_ha_str *ha)
 		ha->sdev = NULL;
 	}
 
-	gdth_flush(ha);
-
 	if (shp->irq)
 		free_irq(shp->irq,ha);
 
@@ -5245,14 +5245,15 @@ static void __exit gdth_exit(void)
 {
 	gdth_ha_str *ha;
 
-	list_for_each_entry(ha, &gdth_instances, list)
-		gdth_remove_one(ha);
+	unregister_chrdev(major,"gdth");
+	unregister_reboot_notifier(&gdth_notifier);
 
 #ifdef GDTH_STATISTICS
-	del_timer(&gdth_timer);
+	del_timer_sync(&gdth_timer);
 #endif
-	unregister_chrdev(major,"gdth");
-	unregister_reboot_notifier(&gdth_notifier);
+
+	list_for_each_entry(ha, &gdth_instances, list)
+		gdth_remove_one(ha);
 }
 
 module_init(gdth_init);
-- 
1.5.3.3


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