linux-kernel - [PATCH] ide: fix generic_ide

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Message-ID: <87txvwgtkx.fsf@tucsk.pomaz.szeredi.hu>
Date:	Tue, 21 Aug 2012 17:20:30 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	davem@...emloft.net
CC:	rjw@...k.pl, stern@...land.harvard.edu, hdegoede@...hat.com,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-ide@...r.kernel.org
Subject: [PATCH] ide: fix generic_ide_suspend/resume Oops

From: Miklos Szeredi <mszeredi@...e.cz>

This patch fixes a regresion introduced by commit 0998d063 (device-core: Ensure
drvdata = NULL when no driver is bound).

Suspend oopses in generic_ide_suspend() because dev_get_drvdata()
returns NULL (dev->p->driver_data == NULL) and this function is not
prepared for this.

Fix is based on Alan Stern's suggestion.

Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
Acked-by: Rafael J. Wysocki <rjw@...k.pl>
---
 drivers/ide/ide-pm.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index 9240609..8d1e32d 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -4,7 +4,7 @@
 
 int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 {
-	ide_drive_t *drive = dev_get_drvdata(dev);
+	ide_drive_t *drive = to_ide_device(dev);
 	ide_drive_t *pair = ide_get_pair_dev(drive);
 	ide_hwif_t *hwif = drive->hwif;
 	struct request *rq;
@@ -40,7 +40,7 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
 
 int generic_ide_resume(struct device *dev)
 {
-	ide_drive_t *drive = dev_get_drvdata(dev);
+	ide_drive_t *drive = to_ide_device(dev);
 	ide_drive_t *pair = ide_get_pair_dev(drive);
 	ide_hwif_t *hwif = drive->hwif;
 	struct request *rq;
-- 
1.7.7

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