X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=block%2Fblk-core.c;h=827f8badd143fbf7571b608264571691af6686c5;hb=fcab86add71623e3963d7565c0d61bb9d99aea7c;hp=45f4d7efbf349efa77f8c9d425e1d0ece4fbd9d4;hpb=48d10bda1f2c69980601a61194015bb0790fb7ab;p=cascardo%2Flinux.git

diff --git a/block/blk-core.c b/block/blk-core.c
index 45f4d7efbf34..827f8badd143 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -3529,6 +3529,30 @@ void blk_post_runtime_resume(struct request_queue *q, int err)
 	spin_unlock_irq(q->queue_lock);
 }
 EXPORT_SYMBOL(blk_post_runtime_resume);
+
+/**
+ * blk_set_runtime_active - Force runtime status of the queue to be active
+ * @q: the queue of the device
+ *
+ * If the device is left runtime suspended during system suspend the resume
+ * hook typically resumes the device and corrects runtime status
+ * accordingly. However, that does not affect the queue runtime PM status
+ * which is still "suspended". This prevents processing requests from the
+ * queue.
+ *
+ * This function can be used in driver's resume hook to correct queue
+ * runtime PM status and re-enable peeking requests from the queue. It
+ * should be called before first request is added to the queue.
+ */
+void blk_set_runtime_active(struct request_queue *q)
+{
+	spin_lock_irq(q->queue_lock);
+	q->rpm_status = RPM_ACTIVE;
+	pm_runtime_mark_last_busy(q->dev);
+	pm_request_autosuspend(q->dev);
+	spin_unlock_irq(q->queue_lock);
+}
+EXPORT_SYMBOL(blk_set_runtime_active);
 #endif
 
 int __init blk_dev_init(void)