FAILED: patch "[PATCH] Revert "scsi: Fix a bdi reregistration race"" failed to apply to 3.14-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 3.14-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

>From e619e6cbecb7fe97a924d625e848605333457b13 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bart.vanassche@sandisk.com>
Date: Fri, 20 Nov 2015 14:11:01 -0800
Subject: [PATCH] Revert "scsi: Fix a bdi reregistration race"

The SCSI sd driver probes SCSI devices asynchronously. The sd_remove()
function, called indirectly by device_del(), waits until asynchronous
probing has finished. Since the block layer queue must only be cleaned
up after probing has finished, device_del() has to be called before
blk_cleanup_queue(). Hence revert commit bf2cf3baa20b.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: James Bottomley <JBottomley@Odin.com>

diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 8d2312239ae0..f5ace2bfc6db 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -1110,7 +1110,9 @@ void __scsi_remove_device(struct scsi_device *sdev)
 		device_unregister(&sdev->sdev_dev);
 		transport_remove_device(dev);
 		scsi_dh_remove_device(sdev);
-	}
+		device_del(dev);
+	} else
+		put_device(&sdev->sdev_dev);
 
 	/*
 	 * Stop accepting new requests and wait until all queuecommand() and
@@ -1121,16 +1123,6 @@ void __scsi_remove_device(struct scsi_device *sdev)
 	blk_cleanup_queue(sdev->request_queue);
 	cancel_work_sync(&sdev->requeue_work);
 
-	/*
-	 * Remove the device after blk_cleanup_queue() has been called such
-	 * a possible bdi_register() call with the same name occurs after
-	 * blk_cleanup_queue() has called bdi_destroy().
-	 */
-	if (sdev->is_visible)
-		device_del(dev);
-	else
-		put_device(&sdev->sdev_dev);
-
 	if (sdev->host->hostt->slave_destroy)
 		sdev->host->hostt->slave_destroy(sdev);
 	transport_destroy_device(dev);