Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  Add UNPLUG traces to all appropriate places
  block: fix requeue handling in blk_queue_invalidate_tags()
  mmc: Fix sg helper copy-and-paste error
  pktcdvd: fix BUG caused by sysfs module reference semantics change
  ioprio: allow sys_ioprio_set() value of 0 to reset ioprio setting
  cfq_idle_class_timer: add paranoid checks for jiffies overflow
  cfq: fix IOPRIO_CLASS_IDLE delays
  cfq: fix IOPRIO_CLASS_IDLE accounting

11 files changed, 20 insertions, 19 deletions

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index a8130a4ad6d..a5ee21319d3 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -358,10 +358,19 @@ static ssize_t class_pktcdvd_store_add(struct class *c, const char *buf,
 					size_t count)
 {
 	unsigned int major, minor;
+
 	if (sscanf(buf, "%u:%u", &major, &minor) == 2) {
+		/* pkt_setup_dev() expects caller to hold reference to self */
+		if (!try_module_get(THIS_MODULE))
+			return -ENODEV;
+
 		pkt_setup_dev(MKDEV(major, minor), NULL);
+
+		module_put(THIS_MODULE);
+
 		return count;
 	}
+
 	return -EINVAL;
 }
 
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 7c426d07a55..1b1ef3130e6 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1207,8 +1207,7 @@ int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sect
 			prepare_to_wait(&bitmap->overflow_wait, &__wait,
 					TASK_UNINTERRUPTIBLE);
 			spin_unlock_irq(&bitmap->lock);
-			bitmap->mddev->queue
-				->unplug_fn(bitmap->mddev->queue);
+			blk_unplug(bitmap->mddev->queue);
 			schedule();
 			finish_wait(&bitmap->overflow_wait, &__wait);
 			continue;
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 5a7eb650181..e298d8d11f2 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1000,8 +1000,7 @@ void dm_table_unplug_all(struct dm_table *t)
 		struct dm_dev *dd = list_entry(d, struct dm_dev, list);
 		struct request_queue *q = bdev_get_queue(dd->bdev);
 
-		if (q->unplug_fn)
-			q->unplug_fn(q);
+		blk_unplug(q);
 	}
 }
 
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index 56a11f6c127..3dac1cfb818 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -87,8 +87,7 @@ static void linear_unplug(struct request_queue *q)
 
 	for (i=0; i < mddev->raid_disks; i++) {
 		struct request_queue *r_queue = bdev_get_queue(conf->disks[i].rdev->bdev);
-		if (r_queue->unplug_fn)
-			r_queue->unplug_fn(r_queue);
+		blk_unplug(r_queue);
 	}
 }
 
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 808cd954945..cef9ebd5a04 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5445,7 +5445,7 @@ void md_do_sync(mddev_t *mddev)
 		 * about not overloading the IO subsystem. (things like an
 		 * e2fsck being done on the RAID array should execute fast)
 		 */
-		mddev->queue->unplug_fn(mddev->queue);
+		blk_unplug(mddev->queue);
 		cond_resched();
 
 		currspeed = ((unsigned long)(io_sectors-mddev->resync_mark_cnt))/2
@@ -5464,7 +5464,7 @@ void md_do_sync(mddev_t *mddev)
 	 * this also signals 'finished resyncing' to md_stop
 	 */
  out:
-	mddev->queue->unplug_fn(mddev->queue);
+	blk_unplug(mddev->queue);
 
 	wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active));
 
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index b35731cceac..eb631ebed68 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -125,8 +125,7 @@ static void unplug_slaves(mddev_t *mddev)
 			atomic_inc(&rdev->nr_pending);
 			rcu_read_unlock();
 
-			if (r_queue->unplug_fn)
-				r_queue->unplug_fn(r_queue);
+			blk_unplug(r_queue);
 
 			rdev_dec_pending(rdev, mddev);
 			rcu_read_lock();
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index c111105fc2d..f8e591708d1 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -35,8 +35,7 @@ static void raid0_unplug(struct request_queue *q)
 	for (i=0; i<mddev->raid_disks; i++) {
 		struct request_queue *r_queue = bdev_get_queue(devlist[i]->bdev);
 
-		if (r_queue->unplug_fn)
-			r_queue->unplug_fn(r_queue);
+		blk_unplug(r_queue);
 	}
 }
 
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 85478d6a9c1..4a69c416e04 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -549,8 +549,7 @@ static void unplug_slaves(mddev_t *mddev)
 			atomic_inc(&rdev->nr_pending);
 			rcu_read_unlock();
 
-			if (r_queue->unplug_fn)
-				r_queue->unplug_fn(r_queue);
+			blk_unplug(r_queue);
 
 			rdev_dec_pending(rdev, mddev);
 			rcu_read_lock();
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index fc6607acb6e..5cdcc938620 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -593,8 +593,7 @@ static void unplug_slaves(mddev_t *mddev)
 			atomic_inc(&rdev->nr_pending);
 			rcu_read_unlock();
 
-			if (r_queue->unplug_fn)
-				r_queue->unplug_fn(r_queue);
+			blk_unplug(r_queue);
 
 			rdev_dec_pending(rdev, mddev);
 			rcu_read_lock();
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 82af3465a90..1cfc984cc7b 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3186,8 +3186,7 @@ static void unplug_slaves(mddev_t *mddev)
 			atomic_inc(&rdev->nr_pending);
 			rcu_read_unlock();
 
-			if (r_queue->unplug_fn)
-				r_queue->unplug_fn(r_queue);
+			blk_unplug(r_queue);
 
 			rdev_dec_pending(rdev, mddev);
 			rcu_read_lock();
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 9203a0b221b..1b9c9b6da5b 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -310,7 +310,7 @@ static void copy_sg(struct scatterlist *dst, unsigned int dst_len,
 		}
 
 		if (src_size == 0) {
-			src_buf = sg_virt(dst);
+			src_buf = sg_virt(src);
 			src_size = src->length;
 		}