diff options
| author | Johannes Berg <johannes@sipsolutions.net> | 2010-06-16 02:09:35 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-07-08 10:11:44 +0200 |
| commit | 3cd8519248e9e17d982c6fab0f1a89bca6feb49a (patch) | |
| tree | 56c659bff188ab82343f2ec40d5a0f8a38c46fe7 /arch/powerpc/kernel/irq.c | |
| parent | powerpc/iseries: Fix possible null pointer dereference in iSeries_pcibios_fix... (diff) | |
| download | linux-3cd8519248e9e17d982c6fab0f1a89bca6feb49a.tar.xz linux-3cd8519248e9e17d982c6fab0f1a89bca6feb49a.zip | |
powerpc: Fix logic error in fixup_irqs
When SPARSE_IRQ is set, irq_to_desc() can
return NULL. While the code here has a
check for NULL, it's not really correct.
Fix it by separating the check for it.
This fixes CPU hot unplug for me.
Reported-by: Alastair Bridgewater <alastair.bridgewater@gmail.com>
Cc: stable@kernel.org [2.6.32+]
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/irq.c')
| -rw-r--r-- | arch/powerpc/kernel/irq.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 3333bbdd23ef..77be3d058a65 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -295,7 +295,10 @@ void fixup_irqs(const struct cpumask *map) for_each_irq(irq) { desc = irq_to_desc(irq); - if (desc && desc->status & IRQ_PER_CPU) + if (!desc) + continue; + + if (desc->status & IRQ_PER_CPU) continue; cpumask_and(mask, desc->affinity, map); |