From: Li Nan <linan122@xxxxxxxxxx>
There is a merge issue when adding badblocks as follow:
echo 0 10 > bad_blocks
echo 30 10 > bad_blocks
echo 20 10 > bad_blocks
cat bad_blocks
0 10
20 10 //should be merged with (30 10)
30 10
In this case, if new badblocks does not intersect with prev, it is added
by insert_at(). If there is an intersection with prev+1, the merge will
be processed in the next re_insert loop.
However, when the end of the new badblocks is exactly equal to the offset
of prev+1, no further re_insert loop occurs, and the two badblocks are not
merge.
Fix it by inc prev, badblocks can be merged during the subsequent code.
Fixes: aa511ff8218b ("badblocks: switch to the improved badblock handling code")
Signed-off-by: Li Nan <linan122@xxxxxxxxxx>
Reviewed-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
block/badblocks.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/badblocks.c b/block/badblocks.c
index 57e9edf9b848..92bd43f7fff1 100644
--- a/block/badblocks.c
+++ b/block/badblocks.c
@@ -892,7 +892,7 @@ static int _badblocks_set(struct badblocks *bb, sector_t s, int sectors,
len = insert_at(bb, 0, &bad);
bb->count++;
added++;
- hint = 0;
+ hint = ++prev;
goto update_sectors;
}
@@ -947,7 +947,7 @@ static int _badblocks_set(struct badblocks *bb, sector_t s, int sectors,
len = insert_at(bb, prev + 1, &bad);
bb->count++;
added++;
- hint = prev + 1;
+ hint = ++prev;
update_sectors:
s += len;
--
2.39.2
