ASoC: tpa6130a2: Update e-mail address

[linux-2.6.git] / block / blk-exec.c

diff --git a/block/blk-exec.c b/block/blk-exec.c
index 4f52f279205942f48c2870d4ee77447d0aea515a..7482b7fa863ba10b337d7547fb7040767e02b2da 100644 (file)
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -16,9 +16,9 @@
 /**
  * blk_end_sync_rq - executes a completion event on a request
  * @rq: request to complete
- * @error: end io status of the request
+ * @error: end I/O status of the request
  */
-void blk_end_sync_rq(struct request *rq, int error)
+static void blk_end_sync_rq(struct request *rq, int error)
 {
        struct completion *waiting = rq->end_io_data;
 
@@ -31,7 +31,6 @@ void blk_end_sync_rq(struct request *rq, int error)
         */
        complete(waiting);
 }
-EXPORT_SYMBOL(blk_end_sync_rq);
 
 /**
  * blk_execute_rq_nowait - insert a request into queue for execution
@@ -42,7 +41,7 @@ EXPORT_SYMBOL(blk_end_sync_rq);
  * @done:      I/O completion handler
  *
  * Description:
- *    Insert a fully prepared request at the back of the io scheduler queue
+ *    Insert a fully prepared request at the back of the I/O scheduler queue
  *    for execution.  Don't wait for completion.
  */
 void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
@@ -52,14 +51,13 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
        int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
 
        rq->rq_disk = bd_disk;
-       rq->cmd_flags |= REQ_NOMERGE;
        rq->end_io = done;
        WARN_ON(irqs_disabled());
        spin_lock_irq(q->queue_lock);
-       __elv_add_request(q, rq, where, 1);
-       __generic_unplug_device(q);
+       __elv_add_request(q, rq, where);
+       __blk_run_queue(q, false);
        /* the queue is stopped so it won't be plugged+unplugged */
-       if (blk_pm_resume_request(rq))
+       if (rq->cmd_type == REQ_TYPE_PM_RESUME)
                q->request_fn(q);
        spin_unlock_irq(q->queue_lock);
 }
@@ -73,7 +71,7 @@ EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
  * @at_head:    insert request at head or tail of queue
  *
  * Description:
- *    Insert a fully prepared request at the back of the io scheduler queue
+ *    Insert a fully prepared request at the back of the I/O scheduler queue
  *    for execution and wait for completion.
  */
 int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
@@ -82,6 +80,7 @@ int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
        DECLARE_COMPLETION_ONSTACK(wait);
        char sense[SCSI_SENSE_BUFFERSIZE];
        int err = 0;
+       unsigned long hang_check;
 
        /*
         * we need an extra reference to the request, so we can look at
@@ -97,7 +96,13 @@ int blk_execute_rq(struct request_queue *q, struct gendisk *bd_disk,
 
        rq->end_io_data = &wait;
        blk_execute_rq_nowait(q, bd_disk, rq, at_head, blk_end_sync_rq);
-       wait_for_completion(&wait);
+
+       /* Prevent hang_check timer from firing at us during very long I/O */
+       hang_check = sysctl_hung_task_timeout_secs;
+       if (hang_check)
+               while (!wait_for_completion_timeout(&wait, hang_check * (HZ/2)));
+       else
+               wait_for_completion(&wait);
 
        if (rq->errors)
                err = -EIO;