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irqchip/gic-v3-its: Zero command on allocation
author
Marc Zyngier
<marc.zyngier@arm.com>
Mon, 19 Dec 2016 17:16:45 +0000
(17:16 +0000)
committer
Marc Zyngier
<marc.zyngier@arm.com>
Wed, 8 Feb 2017 17:09:56 +0000
(17:09 +0000)
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>
drivers/irqchip/irq-gic-v3-its.c
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diff --git
a/drivers/irqchip/irq-gic-v3-its.c
b/drivers/irqchip/irq-gic-v3-its.c
index
ee928de
..
4a895c6
100644
(file)
--- 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;
}