summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms
diff options
context:
space:
mode:
authorGavin Shan <gwshan@linux.vnet.ibm.com>2015-01-23 04:25:06 +0100
committerMichael Ellerman <mpe@ellerman.id.au>2015-01-28 05:28:10 +0100
commit31494cf3532cfee0bf5c913ac9962971aab7b1d4 (patch)
tree73ebfdceed8b6920cd867c962712dd7bc69953e4 /arch/powerpc/platforms
parentpowerpc/powernv: Separate function for OPAL IRQ setup (diff)
downloadlinux-31494cf3532cfee0bf5c913ac9962971aab7b1d4.tar.xz
linux-31494cf3532cfee0bf5c913ac9962971aab7b1d4.zip
powerpc/powernv: Don't alloc IRQ map if necessary
On PowerNV platform, the OPAL interrupts are exported by firmware through device-node property (/ibm,opal::opal-interrupts). Under some extreme circumstances (e.g. simulator), we don't have this property found from the device tree. For that case, we shouldn't allocate the interrupt map. Otherwise, slab complains allocating zero sized memory chunk. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms')
-rw-r--r--arch/powerpc/platforms/powernv/opal.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
index 933c7fbd6b54..18fd4e71c9c1 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -708,11 +708,12 @@ static void __init opal_irq_init(struct device_node *dn)
/* Get interrupt property */
irqs = of_get_property(opal_node, "opal-interrupts", &irqlen);
- pr_debug("Found %d interrupts reserved for OPAL\n",
- irqs ? (irqlen / 4) : 0);
+ opal_irq_count = irqs ? (irqlen / 4) : 0;
+ pr_debug("Found %d interrupts reserved for OPAL\n", opal_irq_count);
+ if (!opal_irq_count)
+ return;
/* Install interrupt handlers */
- opal_irq_count = irqlen / 4;
opal_irqs = kzalloc(opal_irq_count * sizeof(unsigned int), GFP_KERNEL);
for (i = 0; irqs && i < opal_irq_count; i++, irqs++) {
unsigned int irq, virq;