commit: 1430e17844e2cd15bc15f3c21b5349e762f6ba41
From: Kim, Milo <[email protected]>
Date: Thu, 29 Nov 2012 13:54:36 -0800
Subject: drivers/rtc/rtc-tps65910.c: fix invalid pointer access on _remove()
The tps65910_rtc data is registered as the platform driver data in
_probe(= ). Therefore the tps65910_rtc should be used on unregistering
the rtc device. And device pointer should be retrieved from the
platform_device structure.
This patch fixes the below oops:
Unable to handle kernel NULL pointer dereference at virtual address 00000008
Modules linked in: rtc_tps65910(-)
CPU: 0 Not tainted (3.7.0-rc7-next-20121128-g6b1f974-dirty #7)
PC is at tps65910_rtc_alarm_irq_enable+0x20/0x2c [rtc_tps65910]
(tps65910_rtc_alarm_irq_enable+0x20/0x2c [rtc_tps65910])
(tps65910_rtc_remove+0x18/0x28 [rtc_tps65910])
(platform_drv_remove+0x18/0x1c)
(__device_release_driver+0x70/0xcc)
(driver_detach+0xb4/0xb8)
(bus_remove_driver+0x7c/0xc0)
(sys_delete_module+0x148/0x21c)
Signed-off-by: Milo(Woogyom) Kim <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
---
drivers/rtc/rtc-tps65910.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c
index 7a82337..073108d 100644
--- a/drivers/rtc/rtc-tps65910.c
+++ b/drivers/rtc/rtc-tps65910.c
@@ -288,11 +288,11 @@ static int __devinit tps65910_rtc_probe(struct
platform_device *pdev)
static int __devexit tps65910_rtc_remove(struct platform_device *pdev)
{
/* leave rtc running, but disable irqs */
- struct rtc_device *rtc = platform_get_drvdata(pdev);
+ struct tps65910_rtc *tps_rtc = platform_get_drvdata(pdev);
- tps65910_rtc_alarm_irq_enable(&rtc->dev, 0);
+ tps65910_rtc_alarm_irq_enable(&pdev->dev, 0);
- rtc_device_unregister(rtc);
+ rtc_device_unregister(tps_rtc->rtc);
return 0;
}
--
1.7.3.4
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