linux-kernel - [PATCH v3 4/4] block/badblocks: fix the bug of reverse order

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Message-Id: <20230621172052.1499919-5-linan666@huaweicloud.com>
Date:   Thu, 22 Jun 2023 01:20:52 +0800
From:   linan666@...weicloud.com
To:     axboe@...nel.dk, linan122@...wei.com, dan.j.williams@...el.com,
        vishal.l.verma@...el.com
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        yukuai3@...wei.com, yi.zhang@...wei.com, houtao1@...wei.com,
        yangerkun@...wei.com
Subject: [PATCH v3 4/4] block/badblocks: fix the bug of reverse order

From: Li Nan <linan122@...wei.com>

Order of badblocks will be reversed if we set a large area at once. 'hi'
remains unchanged while adding continuous badblocks is wrong, the next
setting is greater than 'hi', it should be added to the next position.
Let 'hi' +1 each cycle.

  # echo 0 2048 > bad_blocks
  # cat bad_blocks
    1536 512
    1024 512
    512 512
    0 512

Fixes: 9e0e252a048b ("badblocks: Add core badblock management code")
Signed-off-by: Li Nan <linan122@...wei.com>
---
 block/badblocks.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/badblocks.c b/block/badblocks.c
index 2c2ef8284a3f..3b816690b940 100644
--- a/block/badblocks.c
+++ b/block/badblocks.c
@@ -301,6 +301,7 @@ int badblocks_set(struct badblocks *bb, sector_t s, int sectors,
 			p[hi] = BB_MAKE(s, this_sectors, acknowledged);
 			sectors -= this_sectors;
 			s += this_sectors;
+			hi++;
 			changed = true;
 		}
 	}
-- 
2.39.2