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authorOleksij Rempel <linux@rempel-privat.de>2015-10-12 22:15:30 +0300
committerThomas Gleixner <tglx@linutronix.de>2015-10-14 10:37:47 +0300
commite59a8451be1162d5a10a33e40092f1796cb8fdca (patch)
tree4ded8d04e8e213d338680b29bc0eb9f79a6371d1 /drivers/irqchip
parente7a46c818564329f977f8fa157b5e9e1d0d83012 (diff)
downloadlinux-e59a8451be1162d5a10a33e40092f1796cb8fdca.tar.xz
irqchip/mxs: Panic if ioremap or domain creation fails
Current code will only warn and then dereference the NULL pointer or continue, which results in a fatal NULL pointer dereference later. If the initialization fails, the machine is unusable, so panic right away. [ tglx: Massaged changelog and picked the irqdomain panic from the next patch] Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Tested-by: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: marc.zyngier@arm.com Cc: jason@lakedaemon.net Link: http://lkml.kernel.org/r/1444677334-12242-2-git-send-email-linux@rempel-privat.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-mxs.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-mxs.c b/drivers/irqchip/irq-mxs.c
index 604df63e2edf..96148a7beba1 100644
--- a/drivers/irqchip/irq-mxs.c
+++ b/drivers/irqchip/irq-mxs.c
@@ -97,7 +97,8 @@ static int __init icoll_of_init(struct device_node *np,
struct device_node *interrupt_parent)
{
icoll_base = of_iomap(np, 0);
- WARN_ON(!icoll_base);
+ if (!icoll_base)
+ panic("%s: unable to map resource", np->full_name);
/*
* Interrupt Collector reset, which initializes the priority
@@ -107,6 +108,9 @@ static int __init icoll_of_init(struct device_node *np,
icoll_domain = irq_domain_add_linear(np, ICOLL_NUM_IRQS,
&icoll_irq_domain_ops, NULL);
- return icoll_domain ? 0 : -ENODEV;
+ if (!icoll_domain)
+ panic("%s: unable to create irqdomain", np->full_name);
+
+ return 0;
}
IRQCHIP_DECLARE(mxs, "fsl,icoll", icoll_of_init);