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Commit 33e1e5e317b0fc78ac6588ec8aa40005bcddd7ce

Authored by Todd Poynor
Committed by Sekhar Nori
1 parent f299bb9527
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

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>

Showing 1 changed file with 6 additions and 0 deletions Side-by-side Diff

arch/arm/mach-davinci/irq.c
Diff comments   View file @ 33e1e5e
... ... @@ -52,6 +52,12 @@
52 52 struct irq_chip_type *ct;
53 53  
54 54 gc = irq_alloc_generic_chip("AINTC", 1, irq_start, base, handle_edge_irq);
  55 + if (!gc) {
  56 + pr_err("%s: irq_alloc_generic_chip for IRQ %u failed\n",
  57 + __func__, irq_start);
  58 + return;
  59 + }
  60 +
55 61 ct = gc->chip_types;
56 62 ct->chip.irq_ack = irq_gc_ack;
57 63 ct->chip.irq_mask = irq_gc_mask_clr_bit;