irqchip/sunxi-nmi: Fix error check of of_io_request_and_map()
authorVladimir Zapolskiy <vz@mleia.com>
Wed, 9 Mar 2016 01:21:29 +0000 (03:21 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 10 Mar 2016 15:03:30 +0000 (16:03 +0100)
commitcfe199afefe6201e998ddc07102fc1fdb55f196c
tree1883ee9985ae5e26ad45a4d8034639abba7f0307
parent52b2a05fa7c8cfceebb59117a95decd68cf7e465
irqchip/sunxi-nmi: Fix error check of of_io_request_and_map()

The of_io_request_and_map() returns a valid pointer in iomem region or
ERR_PTR(), check for NULL always fails and may cause a NULL pointer
dereference on error path.

Fixes: 0e841b04c829 ("irqchip/sunxi-nmi: Switch to of_io_request_and_map() from of_iomap()")
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1457486489-10189-1-git-send-email-vz@mleia.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
drivers/irqchip/irq-sunxi-nmi.c