[PATCH 5.17 1030/1126] gfs2: Fix gfs2_file_buffered_write endless loop workaround

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

From: Andreas Gruenbacher <agruenba@xxxxxxxxxx>

commit 46f3e0421ccb5474b5c006b0089b9dfd42534bb6 upstream.

Since commit 554c577cee95b, gfs2_file_buffered_write() can accidentally
return a truncated iov_iter, which might confuse callers.  Fix that.

Fixes: 554c577cee95b ("gfs2: Prevent endless loops in gfs2_file_buffered_write")
Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 fs/gfs2/file.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -1083,6 +1083,7 @@ out_uninit:
 	gfs2_holder_uninit(gh);
 	if (statfs_gh)
 		kfree(statfs_gh);
+	from->count = orig_count - read;
 	return read ? read : ret;
 }