Staging: hv: Cleanup blkvsc_remove()

The function storvsc_dev_remove() already deals with draining of
the outstanding I/O. Cleanup blkvsc_remove() keeping this in mind.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/blkvsc_drv.c

@@ -538,11 +538,6 @@ static int blkvsc_remove(struct hv_device *dev)
 	struct block_device_context *blkdev = dev_get_drvdata(&dev->device);
 	unsigned long flags;
 
-	/*
-	 * Call to the vsc driver to let it know that the device is being
-	 * removed
-	 */
-	storvsc_dev_remove(dev);
 
 	/* Get to a known state */
 	spin_lock_irqsave(&blkdev->lock, flags);
@@ -555,17 +550,16 @@ static int blkvsc_remove(struct hv_device *dev)
 
 	spin_unlock_irqrestore(&blkdev->lock, flags);
 
-	while (blkdev->num_outstanding_reqs) {
-		DPRINT_INFO(STORVSC, "waiting for %d requests to complete...",
-			    blkdev->num_outstanding_reqs);
-		udelay(100);
-	}
-
-
 	blkvsc_do_operation(blkdev, DO_FLUSH);
 
 	blk_cleanup_queue(blkdev->gd->queue);
 
+	/*
+	 * Call to the vsc driver to let it know that the device is being
+	 * removed
+	 */
+	storvsc_dev_remove(dev);
+
 	del_gendisk(blkdev->gd);
 
 	kmem_cache_destroy(blkdev->request_pool);