Commit a0747a85 authored Nov 17, 2017 by weiping zhang Committed by Jens Axboe Nov 19, 2017

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>

parent 97f07697

mm/backing-dev.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -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);