提交 04dbc09b 编写于 作者: D David Kershner 提交者: Greg Kroah-Hartman

staging: unisys: visorbus: add timeout to controlvm_periodic_work

Limit the amount that gets pulled from the queue on each try so we don't
get stuck in an infinite loop if something has gone wrong with the s-Par
firmware.
Signed-off-by: NDavid Kershner <david.kershner@unisys.com>
Reviewed-by: NTim Sell <timothy.sell@unisys.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
上级 d02bde9d
......@@ -1785,6 +1785,7 @@ static void
controlvm_periodic_work(struct work_struct *work)
{
struct controlvm_message inmsg;
int count = 0;
int err;
/* Drain the RESPONSE queue make it empty */
......@@ -1792,7 +1793,7 @@ controlvm_periodic_work(struct work_struct *work)
err = visorchannel_signalremove(chipset_dev->controlvm_channel,
CONTROLVM_QUEUE_RESPONSE,
&inmsg);
} while (!err);
} while ((!err) && (++count < CONTROLVM_MESSAGE_MAX));
if (err != -EAGAIN)
goto schedule_out;
......
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