diff mbox series

[2/2] ubi: Correct the number of PEBs after a volume resize failure

Message ID 20230406071331.1247429-3-wangzhaolong1@huawei.com
State Changes Requested
Headers show
Series Fix some bugs in ubi_resize_volume() function | expand

Commit Message

Wang Zhaolong April 6, 2023, 7:13 a.m. UTC
In the error handing path `out_acc` of the ubi_resize_volume(),
when `pebs < 0`, it means that the volume table record fails to be
updated when the volume is shrinked. In this case, the number of
ubi->avail_pebs` and `ubi->rsvd_pebs` should also be restored,
otherwise the UBI will display an incorrect number of available PEBs.

Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com>
---
 drivers/mtd/ubi/vmt.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

Comments

Zhihao Cheng April 6, 2023, 11:52 a.m. UTC | #1
> In the error handing path `out_acc` of the ubi_resize_volume(),
> when `pebs < 0`, it means that the volume table record fails to be
> updated when the volume is shrinked. In this case, the number of
> ubi->avail_pebs` and `ubi->rsvd_pebs` should also be restored,
> otherwise the UBI will display an incorrect number of available PEBs.
> 
> Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com>

Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>

> ---
>   drivers/mtd/ubi/vmt.c | 9 ++++-----
>   1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
> index 97294def01eb..990571287e84 100644
> --- a/drivers/mtd/ubi/vmt.c
> +++ b/drivers/mtd/ubi/vmt.c
> @@ -515,13 +515,12 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
>   out_acc:
>   	spin_lock(&ubi->volumes_lock);
>   	vol->reserved_pebs = reserved_pebs - pebs;
> -	if (pebs > 0) {
> -		ubi->rsvd_pebs -= pebs;
> -		ubi->avail_pebs += pebs;
> +	ubi->rsvd_pebs -= pebs;
> +	ubi->avail_pebs += pebs;
> +	if (pebs > 0)
>   		ubi_eba_copy_table(vol, old_eba_tbl, vol->reserved_pebs);
> -	} else {
> +	else
>   		ubi_eba_copy_table(vol, old_eba_tbl, reserved_pebs);
> -	}
>   	vol->eba_tbl = old_eba_tbl;
>   	spin_unlock(&ubi->volumes_lock);
>   out_free:
>
diff mbox series

Patch

diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index 97294def01eb..990571287e84 100644
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -515,13 +515,12 @@  int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
 out_acc:
 	spin_lock(&ubi->volumes_lock);
 	vol->reserved_pebs = reserved_pebs - pebs;
-	if (pebs > 0) {
-		ubi->rsvd_pebs -= pebs;
-		ubi->avail_pebs += pebs;
+	ubi->rsvd_pebs -= pebs;
+	ubi->avail_pebs += pebs;
+	if (pebs > 0)
 		ubi_eba_copy_table(vol, old_eba_tbl, vol->reserved_pebs);
-	} else {
+	else
 		ubi_eba_copy_table(vol, old_eba_tbl, reserved_pebs);
-	}
 	vol->eba_tbl = old_eba_tbl;
 	spin_unlock(&ubi->volumes_lock);
 out_free: