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().
Signed-off-by: weiping zhang <zhangweiping@xxxxxxxxxxxxxxx>
---
mm/backing-dev.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
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);
--
2.14.2
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