提交 33e1e5e3 编写于 作者: T Todd Poynor 提交者: Sekhar Nori

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: NTodd Poynor <toddpoynor@google.com>
Signed-off-by: NSekhar Nori <nsekhar@ti.com>
上级 f299bb95
......@@ -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;
......
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