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authorVladimir Zapolskiy <vz@mleia.com>2016-03-09 04:21:40 +0300
committerThomas Gleixner <tglx@linutronix.de>2016-03-10 18:03:30 +0300
commitedf8fcdc6b254236be005851af35ea5e826e7e09 (patch)
treebaf85238a4aa1b87e958d0af1b6a7b48be503b19 /drivers/irqchip/irq-mxs.c
parentcfe199afefe6201e998ddc07102fc1fdb55f196c (diff)
downloadlinux-edf8fcdc6b254236be005851af35ea5e826e7e09.tar.xz
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>
Diffstat (limited to 'drivers/irqchip/irq-mxs.c')
-rw-r--r--drivers/irqchip/irq-mxs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-mxs.c b/drivers/irqchip/irq-mxs.c
index efe50845939d..17304705f2cf 100644
--- a/drivers/irqchip/irq-mxs.c
+++ b/drivers/irqchip/irq-mxs.c
@@ -183,7 +183,7 @@ static void __iomem * __init icoll_init_iobase(struct device_node *np)
void __iomem *icoll_base;
icoll_base = of_io_request_and_map(np, 0, np->name);
- if (!icoll_base)
+ if (IS_ERR(icoll_base))
panic("%s: unable to map resource", np->full_name);
return icoll_base;
}