From: weiping zhang <zhangweiping@didichuxing.com>
To: axboe@kernel.dk, jack@suse.cz
Cc: linux-block@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH 4/4] block: add WARN_ON if bdi register fail
Date: Fri, 27 Oct 2017 01:36:42 +0800 [thread overview]
Message-ID: <413b04ba6a2a0b03b0cb3c578865d71b2ef97921.1509038624.git.zhangweiping@didichuxing.com> (raw)
In-Reply-To: <cover.1509038624.git.zhangweiping@didichuxing.com>
device_add_disk need do more safety error handle, so this patch just
add WARN_ON.
Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
---
block/genhd.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/block/genhd.c b/block/genhd.c
index dd305c65ffb0..cb55eea821eb 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -660,7 +660,9 @@ void device_add_disk(struct device *parent, struct gendisk *disk)
/* Register BDI before referencing it from bdev */
bdi = disk->queue->backing_dev_info;
- bdi_register_owner(bdi, disk_to_dev(disk));
+ retval = bdi_register_owner(bdi, disk_to_dev(disk));
+ if (retval)
+ WARN_ON(1);
blk_register_region(disk_devt(disk), disk->minors, NULL,
exact_match, exact_lock, disk);
--
2.14.2
--
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next prev parent reply other threads:[~2017-10-26 17:37 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-26 17:35 [PATCH 0/4] add error handle for bdi debugfs register weiping zhang
2017-10-26 17:35 ` [PATCH 1/4] bdi: add check for bdi_debug_root weiping zhang
2017-10-30 13:00 ` Jan Kara
2017-10-31 10:30 ` weiping zhang
2017-10-26 17:35 ` [PATCH 2/4] bdi: convert bdi_debug_register to int weiping zhang
2017-10-30 13:01 ` Jan Kara
2017-10-26 17:36 ` [PATCH 3/4] bdi: add error handle for bdi_debug_register weiping zhang
2017-10-30 13:10 ` Jan Kara
2017-10-31 10:33 ` weiping zhang
2017-10-26 17:36 ` weiping zhang [this message]
2017-10-30 13:14 ` [PATCH 4/4] block: add WARN_ON if bdi register fail Jan Kara
2017-10-31 10:34 ` weiping zhang
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