[PATCH] ext4: Fix ext4_error_err save negative errno into superblock

[PATCH] ext4: Fix ext4_error_err save negative errno into superblock

[Ye Bin]

As read_mmp_block return 1 when failed, so just pass retval to
save_error_info.

Fixes: 54d3adbc29f0 ("ext4: save all error info in save_error_info() and
drop ext4_set_errno()")
Reported-by: Liu Zhi Qiang <liuzhiqiang26@huawei.com>
Signed-off-by: Ye Bin <yebin10@huawei.com>
---
 fs/ext4/mmp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c
index 795c3ff2907c..bb8353e25841 100644
--- a/fs/ext4/mmp.c
+++ b/fs/ext4/mmp.c
@@ -171,7 +171,7 @@ static int kmmpd(void *data)
 		 */
 		if (retval) {
 			if ((failed_writes % 60) == 0) {
-				ext4_error_err(sb, -retval,
+				ext4_error_err(sb, retval,
 					       "Error writing to MMP block");
 			}
 			failed_writes++;
-- 
2.25.4

Re: [PATCH] ext4: Fix ext4_error_err save negative errno into superblock

[Andreas Dilger]

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On Apr 1, 2021, at 1:22 AM, Ye Bin <yebin10@huawei.com> wrote:
> 
> As read_mmp_block return 1 when failed, so just pass retval to
> save_error_info.

Thank you for submitting this patch, but it should not be accepted.

The commit message is confusing, since the code being changed relates
to retval from write_mmp_block().  That currently returns 1, but
only until your next patch is applied.

I think it is better to fix write_mmp_block() as in your next patch
to return a negative value to be more consistent with other code.

Cheers, Andreas

> Fixes: 54d3adbc29f0 ("ext4: save all error info in save_error_info() and
> drop ext4_set_errno()")
> Reported-by: Liu Zhi Qiang <liuzhiqiang26@huawei.com>
> Signed-off-by: Ye Bin <yebin10@huawei.com>
> ---
> fs/ext4/mmp.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c
> index 795c3ff2907c..bb8353e25841 100644
> --- a/fs/ext4/mmp.c
> +++ b/fs/ext4/mmp.c
> @@ -171,7 +171,7 @@ static int kmmpd(void *data)
> 		 */
> 		if (retval) {
> 			if ((failed_writes % 60) == 0) {
> -				ext4_error_err(sb, -retval,
> +				ext4_error_err(sb, retval,
> 					       "Error writing to MMP block");
> 			}
> 			failed_writes++;
> --
> 2.25.4
> 


Cheers, Andreas






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