Commit 8cd640e8 authored Oct 03, 2013 by Sujit Reddy Thumma

block: allow REQ_PM requests even when the device is suspended

Some times even though the block device is suspended by the block layer
the low-level driver might want to queue the PM requests to the device.
Allow such requests to get peeked as the blk_pm_add_request() has already
added it to the I/O scheduler otherwise the request would be forever stuck
in the I/O scheduler without being fetched by the driver.

Change-Id: I353943a7008ea1d92ff825d220cad1828fe37c27
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>

parent 4a149ed1

block/blk-core.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -2140,8 +2140,7 @@ static void blk_account_io_done(struct request *req)
		static struct request blk_pm_peek_request(struct request_queue q,
		struct request *rq)
		{
		if (q->dev && (q->rpm_status == RPM_SUSPENDED \|\|
		(q->rpm_status != RPM_ACTIVE && !(rq->cmd_flags & REQ_PM))))
		if (q->dev && q->rpm_status != RPM_ACTIVE && !(rq->cmd_flags & REQ_PM))
		return NULL;
		else
		return rq;