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afs: fix the afs_dir_get_folio return value 

Keep returning NULL on failure instead of letting an ERR_PTR escape to
callers that don't expect it.

Link: https://lkml.kernel.org/r/20230503154526.1223095-2-hch@lst.de
Fixes: 66dabbb65d ("mm: return an ERR_PTR from __filemap_get_folio")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: David Howells <dhowells@redhat.com>
Tested-by: David Howells <dhowells@redhat.com>
Cc: Marc Dionne <marc.dionne@auristor.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2023-05-03 17:45:26 +02:00 committed by Andrew Morton
parent 28a65b49eb
commit 58f5f6698a
1 changed files with 4 additions and 3 deletions
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7
fs/afs/dir_edit.c
View File

@ -115,11 +115,12 @@ static struct folio *afs_dir_get_folio(struct afs_vnode *vnode, pgoff_t index)
folio = __filemap_get_folio(mapping, index,
FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
mapping->gfp_mask);
if (IS_ERR(folio))
if (IS_ERR(folio)) {
clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags);
else if (folio && !folio_test_private(folio))
return NULL;
}
if (!folio_test_private(folio))
folio_attach_private(folio, (void *)1);
return folio;
}