Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

[linux-2.6-microblaze.git] / block / blk-core.c

diff --git a/block/blk-core.c b/block/blk-core.c
index 96e5fcd..7663a9b 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -18,6 +18,7 @@
 #include <linux/bio.h>
 #include <linux/blkdev.h>
 #include <linux/blk-mq.h>
+#include <linux/blk-pm.h>
 #include <linux/highmem.h>
 #include <linux/mm.h>
 #include <linux/pagemap.h>
@@ -424,11 +425,11 @@ EXPORT_SYMBOL(blk_cleanup_queue);
 /**
  * blk_queue_enter() - try to increase q->q_usage_counter
  * @q: request queue pointer
- * @flags: BLK_MQ_REQ_NOWAIT and/or BLK_MQ_REQ_PREEMPT
+ * @flags: BLK_MQ_REQ_NOWAIT and/or BLK_MQ_REQ_PM
  */
 int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags)
 {
-       const bool pm = flags & BLK_MQ_REQ_PREEMPT;
+       const bool pm = flags & BLK_MQ_REQ_PM;
 
        while (true) {
                bool success = false;
@@ -440,7 +441,8 @@ int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags)
                         * responsible for ensuring that that counter is
                         * globally visible before the queue is unfrozen.
                         */
-                       if (pm || !blk_queue_pm_only(q)) {
+                       if ((pm && queue_rpm_status(q) != RPM_SUSPENDED) ||
+                           !blk_queue_pm_only(q)) {
                                success = true;
                        } else {
                                percpu_ref_put(&q->q_usage_counter);
@@ -465,8 +467,7 @@ int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags)
 
                wait_event(q->mq_freeze_wq,
                           (!q->mq_freeze_depth &&
-                           (pm || (blk_pm_request_resume(q),
-                                   !blk_queue_pm_only(q)))) ||
+                           blk_pm_resume_queue(pm, q)) ||
                           blk_queue_dying(q));
                if (blk_queue_dying(q))
                        return -ENODEV;
@@ -630,7 +631,7 @@ struct request *blk_get_request(struct request_queue *q, unsigned int op,
        struct request *req;
 
        WARN_ON_ONCE(op & REQ_NOWAIT);
-       WARN_ON_ONCE(flags & ~(BLK_MQ_REQ_NOWAIT | BLK_MQ_REQ_PREEMPT));
+       WARN_ON_ONCE(flags & ~(BLK_MQ_REQ_NOWAIT | BLK_MQ_REQ_PM));
 
        req = blk_mq_alloc_request(q, op, flags);
        if (!IS_ERR(req) && q->mq_ops->initialize_rq_fn)