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authorMarc Zyngier <marc.zyngier@arm.com>2016-12-19 20:16:45 +0300
committerMarc Zyngier <marc.zyngier@arm.com>2017-02-08 20:09:56 +0300
commit34d677a90f0682a26327dbefc0db1cf81647e7bc (patch)
treec2443a9419efb341cb10860feb3a5722e7daf8cb /drivers/irqchip
parent5bc13c2cbeec776a2b724cb51bf11fbc30c23318 (diff)
downloadlinux-34d677a90f0682a26327dbefc0db1cf81647e7bc.tar.xz
irqchip/gic-v3-its: Zero command on allocation
When reusing commands from the ring buffer, it would be better to zero them out, even if the ITS should ignore the unused fields. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic-v3-its.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index ee928de49737..4a895c6d6805 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -411,6 +411,12 @@ static struct its_cmd_block *its_allocate_entry(struct its_node *its)
if (its->cmd_write == (its->cmd_base + ITS_CMD_QUEUE_NR_ENTRIES))
its->cmd_write = its->cmd_base;
+ /* Clear command */
+ cmd->raw_cmd[0] = 0;
+ cmd->raw_cmd[1] = 0;
+ cmd->raw_cmd[2] = 0;
+ cmd->raw_cmd[3] = 0;
+
return cmd;
}