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| author | weiping zhang <zhangweiping@didichuxing.com> | 2017-11-17 23:06:04 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-11-19 11:02:13 -0700 |
| commit | a0747a859ef6d3cc5b6cd50eb694499b78dd0025 (patch) | |
| tree | c1402f908087e9d5b5564e72a3533137254fdb0a /mm | |
| parent | 97f07697932e6faf2a708f7aef7cba8e6b0cab96 (diff) | |
| download | linux-a0747a859ef6d3cc5b6cd50eb694499b78dd0025.tar.gz linux-a0747a859ef6d3cc5b6cd50eb694499b78dd0025.tar.bz2 linux-a0747a859ef6d3cc5b6cd50eb694499b78dd0025.zip | |
bdi: add error handle for bdi_debug_register
In order to make error handle more cleaner we call bdi_debug_register
before set state to WB_registered, that we can avoid call bdi_unregister
in release_bdi().
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/backing-dev.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index b5f940ce0143..84b2dc76f140 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -882,10 +882,13 @@ int bdi_register_va(struct backing_dev_info *bdi, const char *fmt, va_list args) if (IS_ERR(dev)) return PTR_ERR(dev); + if (bdi_debug_register(bdi, dev_name(dev))) { + device_destroy(bdi_class, dev->devt); + return -ENOMEM; + } cgwb_bdi_register(bdi); bdi->dev = dev; - bdi_debug_register(bdi, dev_name(dev)); set_bit(WB_registered, &bdi->wb.state); spin_lock_bh(&bdi_lock); |