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authorRobert Richter <rrichter@cavium.com>2017-02-01 20:38:25 +0300
committerMarc Zyngier <marc.zyngier@arm.com>2017-02-08 18:47:44 +0300
commit5bc13c2cbeec776a2b724cb51bf11fbc30c23318 (patch)
tree55498e6d7537123b40960ad94af921b78b91650d /drivers/irqchip
parent4cfffcfa5106492f5785924ce2e9af49f075999b (diff)
downloadlinux-5bc13c2cbeec776a2b724cb51bf11fbc30c23318.tar.xz
irqchip/gic-v3-its: Fix command buffer allocation
The its command buffer must be page aligned, but kzalloc() is not guaranteed to be (though it is mostly when allocating 64k). Use __get_free_pages() as this is used for other buffers as well. Signed-off-by: Robert Richter <rrichter@cavium.com> [Marc: fixed the error path] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic-v3-its.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index fcbba10c0ed9..ee928de49737 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1691,7 +1691,8 @@ static int __init its_probe_one(struct resource *res,
its->ite_size = ((gic_read_typer(its_base + GITS_TYPER) >> 4) & 0xf) + 1;
its->numa_node = numa_node;
- its->cmd_base = kzalloc(ITS_CMD_QUEUE_SZ, GFP_KERNEL);
+ its->cmd_base = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
+ get_order(ITS_CMD_QUEUE_SZ));
if (!its->cmd_base) {
err = -ENOMEM;
goto out_free_its;
@@ -1749,7 +1750,7 @@ static int __init its_probe_one(struct resource *res,
out_free_tables:
its_free_tables(its);
out_free_cmd:
- kfree(its->cmd_base);
+ free_pages((unsigned long)its->cmd_base, get_order(ITS_CMD_QUEUE_SZ));
out_free_its:
kfree(its);
out_unmap: