Since commit 9da3d1e912f3 ("block: Add core atomic write support"),
there is a gap in the blk_status_t codes and block status code 18 is
unused.  This causes blk_status_to_errno() and blk_status_to_str() to
return incorrect values for that code.  Make the blk_status_t codes
consecutive again to avoid that.

Fixes: 9da3d1e912f3 ("block: Add core atomic write support")
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 include/linux/blk_types.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 8808ee76e73c..89a722d76c28 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -168,7 +168,7 @@ typedef u16 blk_short_t;
 /*
  * Invalid size or alignment.
  */
-#define BLK_STS_INVAL	((__force blk_status_t)19)
+#define BLK_STS_INVAL	((__force blk_status_t)18)
 
 /**
  * blk_path_error - returns true if error may be path related
-- 
2.52.0

On 04/03/2026 19:04, Andreas Gruenbacher wrote:
> Since commit 9da3d1e912f3 ("block: Add core atomic write support"),
> there is a gap in the blk_status_t codes and block status code 18 is
> unused.  This causes blk_status_to_errno() and blk_status_to_str() to
> return incorrect values for that code. 

Sure, we get the wrong value (for 18), but 18 does not match a valid 
blk_status_t

> Make the blk_status_t codes
> consecutive again to avoid that.
> 
> Fixes: 9da3d1e912f3 ("block: Add core atomic write support")
> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

Reviewed-by: John Garry <john.g.garry@oracle.com>

> ---
>   include/linux/blk_types.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
> index 8808ee76e73c..89a722d76c28 100644
> --- a/include/linux/blk_types.h
> +++ b/include/linux/blk_types.h
> @@ -168,7 +168,7 @@ typedef u16 blk_short_t;
>   /*
>    * Invalid size or alignment.
>    */
> -#define BLK_STS_INVAL	((__force blk_status_t)19)
> +#define BLK_STS_INVAL	((__force blk_status_t)18)
>   
>   /**
>    * blk_path_error - returns true if error may be path related

On Wed, Mar 04, 2026 at 08:04:06PM +0100, Andreas Gruenbacher wrote:
> Since commit 9da3d1e912f3 ("block: Add core atomic write support"),
> there is a gap in the blk_status_t codes and block status code 18 is
> unused.  This causes blk_status_to_errno() and blk_status_to_str() to
> return incorrect values for that code.  Make the blk_status_t codes
> consecutive again to avoid that.

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>