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| author | Kai Makisara <Kai.Makisara@kolumbus.fi> | 2005-08-02 12:21:51 +0300 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-08-02 10:14:36 -0500 |
| commit | c2c96f46f46df072e49200a1181b3086cd2f08a6 (patch) | |
| tree | fd85a89e3f3d10d7f604b45ae985ecbbc6f28fb6 /drivers/scsi/st.c | |
| parent | c1a15468d58e75debc5437b2e4e12d02a89bb3a2 (diff) | |
| download | lwn-c2c96f46f46df072e49200a1181b3086cd2f08a6.tar.gz lwn-c2c96f46f46df072e49200a1181b3086cd2f08a6.zip | |
[SCSI] Fix SCSI tape oops at module removal
Removing the SCSI tape module results in an oops in class_device_destroy if
any devices are present. The patch at the end of this message fixes the bug
by moving class_destroy() later in exit_st() so that the class still exists
when devices are removed. (The bug is old but class_simple_device_remove() did
nothing when the class did not exist.)
The patch also fixes a "class leak" in init_st() error path.
I would like to get this into 2.6.13 but it may be too late?
Signed-off-by: Kai Makisara <kai.makisara@kolumbus.fi>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/st.c')
| -rw-r--r-- | drivers/scsi/st.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 0291a8fb654d..0a7839db5752 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -4149,12 +4149,10 @@ static int __init init_st(void) do_create_driverfs_files(); return 0; } - if (st_sysfs_class) - class_destroy(st_sysfs_class); unregister_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0), - ST_MAX_TAPE_ENTRIES); } + class_destroy(st_sysfs_class); printk(KERN_ERR "Unable to get major %d for SCSI tapes\n", SCSI_TAPE_MAJOR); return 1; @@ -4162,13 +4160,11 @@ static int __init init_st(void) static void __exit exit_st(void) { - if (st_sysfs_class) - class_destroy(st_sysfs_class); - st_sysfs_class = NULL; do_remove_driverfs_files(); scsi_unregister_driver(&st_template.gendrv); unregister_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0), ST_MAX_TAPE_ENTRIES); + class_destroy(st_sysfs_class); kfree(scsi_tapes); printk(KERN_INFO "st: Unloaded.\n"); } |