irqchip/mxs: Fix error check of of_io_request_and_map()
authorVladimir Zapolskiy <vz@mleia.com>
Wed, 9 Mar 2016 01:21:40 +0000 (03:21 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Thu, 10 Mar 2016 15:03:30 +0000 (16:03 +0100)
commitedf8fcdc6b254236be005851af35ea5e826e7e09
treebaf85238a4aa1b87e958d0af1b6a7b48be503b19
parentcfe199afefe6201e998ddc07102fc1fdb55f196c
irqchip/mxs: 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: 25e34b44313b ("irqchip/mxs: Prepare driver for hardware with different offsets")
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Oleksij Rempel <linux@rempel-privat.de>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1457486500-10237-1-git-send-email-vz@mleia.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
drivers/irqchip/irq-mxs.c