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remove blk_register_filter and blk_unregister_filter in gendisk

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This patch remove blk_register_filter and blk_unregister_filter in
gendisk, and adds them to sd.c, sr.c. and ide-cd.c

The commit abf5439370 moved cmdfilter
from gendisk to request_queue. It turned out that in some subsystems
multiple gendisks share a single request_queue. So we get:

Using physmap partition information
Creating 3 MTD partitions on "physmap-flash":
0x00000000-0x01c00000 : "User FS"
0x01c00000-0x01c40000 : "booter"
kobject (8511c410): tried to init an initialized object, something is seriously wrong.
Call Trace:
[<8036644c>] dump_stack+0x8/0x34
[<8021f050>] kobject_init+0x50/0xcc
[<8021fa18>] kobject_init_and_add+0x24/0x58
[<8021d20c>] blk_register_filter+0x4c/0x64
[<8021c194>] add_disk+0x78/0xe0
[<8027d14c>] add_mtd_blktrans_dev+0x254/0x278
[<8027c8f0>] blktrans_notify_add+0x40/0x78
[<80279c00>] add_mtd_device+0xd0/0x150
[<8027b090>] add_mtd_partitions+0x568/0x5d8
[<80285458>] physmap_flash_probe+0x2ac/0x334
[<802644f8>] driver_probe_device+0x12c/0x244
[<8026465c>] __driver_attach+0x4c/0x84
[<80263c64>] bus_for_each_dev+0x58/0xac
[<802633ec>] bus_add_driver+0xc4/0x24c
[<802648e0>] driver_register+0xcc/0x184
[<80100460>] _stext+0x60/0x1bc

In the long term, we need to fix such subsystems but we need a quick
fix now. This patch add the command filter support to only sd and sr
though it might be useful for other SG_IO users (such as cciss).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Reported-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
FUJITA Tomonori 2008-08-29 11:47:07 +02:00 committed by Jens Axboe
parent 24342c34a0
commit bb23b431db
5 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
block/cmd-filter.c
View File

@ -223,6 +223,7 @@ int blk_register_filter(struct gendisk *disk)
return 0;
}
EXPORT_SYMBOL(blk_register_filter);
void blk_unregister_filter(struct gendisk *disk)
{
@ -231,4 +232,4 @@ void blk_unregister_filter(struct gendisk *disk)
kobject_put(&filter->kobj);
kobject_put(disk->holder_dir->parent);
}
EXPORT_SYMBOL(blk_unregister_filter);

2
block/genhd.c
View File

@ -190,7 +190,6 @@ void add_disk(struct gendisk *disk)
disk->minors, NULL, exact_match, exact_lock, disk);
register_disk(disk);
blk_register_queue(disk);
blk_register_filter(disk);
bdi = &disk->queue->backing_dev_info;
bdi_register_dev(bdi, MKDEV(disk->major, disk->first_minor));
@ -203,7 +202,6 @@ EXPORT_SYMBOL(del_gendisk); /* in partitions/check.c */
void unlink_gendisk(struct gendisk *disk)
{
blk_unregister_filter(disk);
sysfs_remove_link(&disk->dev.kobj, "bdi");
bdi_unregister(&disk->queue->backing_dev_info);
blk_unregister_queue(disk);

2
drivers/ide/ide-cd.c
View File

@ -1933,6 +1933,7 @@ static void ide_cd_remove(ide_drive_t *drive)
ide_proc_unregister_driver(drive, info->driver);
blk_unregister_filter(info->disk);
del_gendisk(info->disk);
ide_cd_put(info);
@ -2158,6 +2159,7 @@ static int ide_cd_probe(ide_drive_t *drive)
g->fops = &idecd_ops;
g->flags |= GENHD_FL_REMOVABLE;
add_disk(g);
blk_register_filter(g);
return 0;
out_free_cd:

2
drivers/scsi/sd.c
View File

@ -1875,6 +1875,7 @@ static int sd_probe(struct device *dev)
dev_set_drvdata(dev, sdkp);
add_disk(gd);
blk_register_filter(gd);
sd_dif_config_host(sdkp);
sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
@ -1908,6 +1909,7 @@ static int sd_remove(struct device *dev)
struct scsi_disk *sdkp = dev_get_drvdata(dev);
device_del(&sdkp->dev);
blk_unregister_filter(sdkp->disk);
del_gendisk(sdkp->disk);
sd_shutdown(dev);

2
drivers/scsi/sr.c
View File

@ -656,6 +656,7 @@ static int sr_probe(struct device *dev)
dev_set_drvdata(dev, cd);
disk->flags |= GENHD_FL_REMOVABLE;
add_disk(disk);
blk_register_filter(disk);
sdev_printk(KERN_DEBUG, sdev,
"Attached scsi CD-ROM %s\n", cd->cdi.name);
@ -894,6 +895,7 @@ static int sr_remove(struct device *dev)
{
struct scsi_cd *cd = dev_get_drvdata(dev);
blk_unregister_filter(cd->disk);
del_gendisk(cd->disk);
mutex_lock(&sr_ref_mutex);