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cifs: fix flushing folio regression for 6.1 backport

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filemap_get_folio works differenty in 6.1 vs. later kernels
(returning NULL in 6.1 instead of an error).  Add
this minor correction which addresses the regression in the patch:
  cifs: Fix flushing, invalidation and file size with copy_file_range()

Link: https://lore.kernel.org/all/a76b370f93cb928c049b94e1fde0d2da506dfcb2.camel@amazon.com/
Reported-by: "Jitindar Singh, Suraj" <surajjs@amazon.com>
Suggested-by: David Howells <dhowells@redhat.com>
Reported-by: Salvatore Bonaccorso <carnil@debian.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Tested-by: Salvatore Bonaccorso <carnil@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Steve French 2024-01-12 23:08:51 -06:00 committed by Greg Kroah-Hartman
parent 0f22c8a6ef
commit f9ee31dc7f
1 changed files with 1 additions and 1 deletions
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2
fs/smb/client/cifsfs.c
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@ -1240,7 +1240,7 @@ static int cifs_flush_folio(struct inode *inode, loff_t pos, loff_t *_fstart, lo
int rc = 0;
folio = filemap_get_folio(inode->i_mapping, index);
if (IS_ERR(folio))
if (!folio)
return 0;
size = folio_size(folio);