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irqchip/gic-v3-its: Zero command on allocation

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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>
This commit is contained in:
Marc Zyngier 2016-12-19 17:16:45 +00:00
commit 34d677a90f
1 changed files with 6 additions and 0 deletions
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6
drivers/irqchip/irq-gic-v3-its.c
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@ -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;
}