diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-07-21 13:46:10 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-07-24 08:46:40 -0600 |
| commit | 765e40b675a9566459ddcb8358ad16f3b8344bbe (patch) | |
| tree | d30e1887c6994b433a40517163cea651769a2cb8 /block | |
| parent | 31c4ccc3ecb4944f6936082fabb5a86e3d086191 (diff) | |
| download | lwn-765e40b675a9566459ddcb8358ad16f3b8344bbe.tar.gz lwn-765e40b675a9566459ddcb8358ad16f3b8344bbe.zip | |
block: disable runtime-pm for blk-mq
The blk-mq code lacks support for looking at the rpm_status field, tracking
active requests and the RQF_PM flag.
Due to the default switch to blk-mq for scsi people start to run into
suspend / resume issue due to this fact, so make sure we disable the runtime
PM functionality until it is properly implemented.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 970b9c9638c5..dbecbf4a64e0 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -3421,6 +3421,10 @@ EXPORT_SYMBOL(blk_finish_plug); */ void blk_pm_runtime_init(struct request_queue *q, struct device *dev) { + /* not support for RQF_PM and ->rpm_status in blk-mq yet */ + if (q->mq_ops) + return; + q->dev = dev; q->rpm_status = RPM_ACTIVE; pm_runtime_set_autosuspend_delay(q->dev, -1); |