diff options
| author | Stanislaw Gruszka <sgruszka@redhat.com> | 2012-03-05 14:28:26 -0700 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2012-03-17 11:14:48 +0100 |
| commit | 8e5ad053e3c97bad7af7f03b5e52fc652a685b3e (patch) | |
| tree | bd85d2606cb99e4445a9b54a3817c6d185303d8e | |
| parent | 050539021e2540f5018ec6e026ff381af287cfcb (diff) | |
| download | lwn-8e5ad053e3c97bad7af7f03b5e52fc652a685b3e.tar.gz lwn-8e5ad053e3c97bad7af7f03b5e52fc652a685b3e.zip | |
bsg: fix sysfs link remove warning
BugLink: http://bugs.launchpad.net/bugs/946928
We create "bsg" link if q->kobj.sd is not NULL, so remove it only
when the same condition is true.
Fixes:
WARNING: at fs/sysfs/inode.c:323 sysfs_hash_and_remove+0x2b/0x77()
sysfs: can not remove 'bsg', no directory
Call Trace:
[<c0429683>] warn_slowpath_common+0x6a/0x7f
[<c0537a68>] ? sysfs_hash_and_remove+0x2b/0x77
[<c042970b>] warn_slowpath_fmt+0x2b/0x2f
[<c0537a68>] sysfs_hash_and_remove+0x2b/0x77
[<c053969a>] sysfs_remove_link+0x20/0x23
[<c05d88f1>] bsg_unregister_queue+0x40/0x6d
[<c0692263>] __scsi_remove_device+0x31/0x9d
[<c069149f>] scsi_forget_host+0x41/0x52
[<c0689fa9>] scsi_remove_host+0x71/0xe0
[<f7de5945>] quiesce_and_remove_host+0x51/0x83 [usb_storage]
[<f7de5a1e>] usb_stor_disconnect+0x18/0x22 [usb_storage]
[<c06c29de>] usb_unbind_interface+0x4e/0x109
[<c067a80f>] __device_release_driver+0x6b/0xa6
[<c067a861>] device_release_driver+0x17/0x22
[<c067a46a>] bus_remove_device+0xd6/0xe6
[<c06785e2>] device_del+0xf2/0x137
[<c06c101f>] usb_disable_device+0x94/0x1a0
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
(cherry picked from commit 37b40adf2d1b4a5e51323be73ccf8ddcf3f15dd3)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | block/bsg.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/bsg.c b/block/bsg.c index 7154a7a7e9ca..e3e3241644de 100644 --- a/block/bsg.c +++ b/block/bsg.c @@ -977,7 +977,8 @@ void bsg_unregister_queue(struct request_queue *q) mutex_lock(&bsg_mutex); idr_remove(&bsg_minor_idr, bcd->minor); - sysfs_remove_link(&q->kobj, "bsg"); + if (q->kobj.sd) + sysfs_remove_link(&q->kobj, "bsg"); device_unregister(bcd->class_dev); bcd->class_dev = NULL; kref_put(&bcd->ref, bsg_kref_release_function); |