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Commit 33e1e5e3 authored by Todd Poynor's avatar Todd Poynor Committed by Sekhar Nori
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ARM: davinci: Check for NULL return from irq_alloc_generic_chip 



Avoid NULL dereference of irq_alloc_generic_chip return in low
memory conditions.

Signed-off-by: default avatarTodd Poynor <toddpoynor@google.com>
Signed-off-by: default avatarSekhar Nori <nsekhar@ti.com>
parent f299bb95

arch/arm/mach-davinci/irq.c

+6 −0
Original line number Diff line number Diff line
@@ -52,6 +52,12 @@ davinci_alloc_gc(void __iomem *base, unsigned int irq_start, unsigned int num) 
	struct irq_chip_type *ct;



	gc = irq_alloc_generic_chip("AINTC", 1, irq_start, base, handle_edge_irq);

	if (!gc) {

		pr_err("%s: irq_alloc_generic_chip for IRQ %u failed\n",

		       __func__, irq_start);

		return;

	}



	ct = gc->chip_types;

	ct->chip.irq_ack = irq_gc_ack;

	ct->chip.irq_mask = irq_gc_mask_clr_bit;