[PATCH] block:added printing when bio->bi_status fails

[824731276@qq.com]

From: baiguo <baiguo@kylinos.cn>

When ftrace is not enabled and bio is not OK,
the system cannot actively record which disk is abnormal.
Add a message record to bio_endio.

Signed-off-by: baiguo <baiguo@kylinos.cn>
---
 block/bio.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/block/bio.c b/block/bio.c
index c4053d496..29ae86c21 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1617,6 +1617,11 @@ void bio_endio(struct bio *bio)
 		bio_clear_flag(bio, BIO_TRACE_COMPLETION);
 	}
 
+	if (bio->bi_status && bio->bi_disk)
+		printk(KERN_ERR "bio: %s status is %d, disk[%d:%d]\n",\
+				__func__, bio->bi_status, bio->bi_disk->major,\
+				bio->bi_disk->first_minor);
+
 	/*
 	 * Need to have a real endio function for chained bios, otherwise
 	 * various corner cases will break (like stacking block devices that
-- 
2.33.0