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: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
diff --git a/arch/arm/mach-davinci/irq.c b/arch/arm/mach-davinci/irq.c
index bfe68ec..85e77fd 100644
--- a/arch/arm/mach-davinci/irq.c
+++ b/arch/arm/mach-davinci/irq.c
@@ -52,6 +52,12 @@
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;