From 60ca5e0d280b1a51df55c5fc2e5bfe010b344c5a Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Tue, 13 Sep 2016 20:32:44 -0700 Subject: [PATCH] driver-core: platform: Catch errors from calls to irq_get_irq_data irq_get_irq_data() can return NULL, which results in a nasty crash. Check its return value before passing it on to irqd_set_trigger_type(). Signed-off-by: Guenter Roeck Reviewed-by: Linus Walleij Signed-off-by: Greg Kroah-Hartman --- drivers/base/platform.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 44c9d4daf510..c4af00385502 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -108,9 +108,14 @@ int platform_get_irq(struct platform_device *dev, unsigned int num) * IORESOURCE_BITS correspond 1-to-1 to the IRQF_TRIGGER* * settings. */ - if (r && r->flags & IORESOURCE_BITS) - irqd_set_trigger_type(irq_get_irq_data(r->start), - r->flags & IORESOURCE_BITS); + if (r && r->flags & IORESOURCE_BITS) { + struct irq_data *irqd; + + irqd = irq_get_irq_data(r->start); + if (!irqd) + return -ENXIO; + irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS); + } return r ? r->start : -ENXIO; #endif -- 2.20.1