[3.11.y.z extended stable] Patch "mtip32xx: Remove dfs_parent after pci unregister" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    mtip32xx: Remove dfs_parent after pci unregister

to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.11.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From ec53273fa153000af7ea0e31baf7eb450f965735 Mon Sep 17 00:00:00 2001
From: Asai Thambi S P <asamymuthupa at micron.com>
Date: Wed, 16 Apr 2014 20:30:16 -0700
Subject: mtip32xx: Remove dfs_parent after pci unregister

commit af5ded8ccf21627f9614afc03b356712666ed225 upstream.

In module exit, dfs_parent and it's subtree were removed before
unregistering with pci. When debugfs entry for each device is attempted
to remove in pci_remove() context, they don't exist, as dfs_parent and
its children were already ripped apart.

Modified to first unregister with pci and then remove dfs_parent.

Signed-off-by: Asai Thambi S P <asamymuthupa at micron.com>
Signed-off-by: Jens Axboe <axboe at fb.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/block/mtip32xx/mtip32xx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index f394f6d21bd0..6342c2190cca 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -4732,13 +4732,13 @@ static int __init mtip_init(void)
  */
 static void __exit mtip_exit(void)
 {
-	debugfs_remove_recursive(dfs_parent);
-
 	/* Release the allocated major block device number. */
 	unregister_blkdev(mtip_major, MTIP_DRV_NAME);

 	/* Unregister the PCI driver. */
 	pci_unregister_driver(&mtip_pci_driver);
+
+	debugfs_remove_recursive(dfs_parent);
 }

 MODULE_AUTHOR("Micron Technology, Inc");
--
1.9.1