[PATCH v2] fs: inode: return proper error code in bmap()

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Return -EOPNOTSUPP instead of -EINVAL which has the meaning of
the argument is an inappropriate value. The current error code doesn't
make sense to represent that a file system doesn't support bmap operation.

Signed-off-by: Leesoo Ahn <lsahn@xxxxxxxxxxxxxx>
---
Changes since v1:
- Modify the comments of bmap()
- Modify subject and description requested by Markus Elfring
https://lore.kernel.org/lkml/20230715060217.1469690-1-lsahn@xxxxxxxxxxxxxx/

 fs/inode.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/inode.c b/fs/inode.c
index 8fefb69e1f84..697c51ed226a 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1831,13 +1831,13 @@ EXPORT_SYMBOL(iput);
  *	4 in ``*block``, with disk block relative to the disk start that holds that
  *	block of the file.
  *
- *	Returns -EINVAL in case of error, 0 otherwise. If mapping falls into a
+ *	Returns -EOPNOTSUPP in case of error, 0 otherwise. If mapping falls into a
  *	hole, returns 0 and ``*block`` is also set to 0.
  */
 int bmap(struct inode *inode, sector_t *block)
 {
 	if (!inode->i_mapping->a_ops->bmap)
-		return -EINVAL;
+		return -EOPNOTSUPP;
 
 	*block = inode->i_mapping->a_ops->bmap(inode->i_mapping, *block);
 	return 0;
-- 
2.34.1




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