queue-6.1/cifs-fix-flushing-folio-regression-for-6.1-backport.patch

   1 From ba288a873fb8ac3d1bf5563366558a905620c071 Mon Sep 17 00:00:00 2001
   2 From: Steve French <stfrench@microsoft.com>
   3 Date: Fri, 12 Jan 2024 23:08:51 -0600
   4 Subject: cifs: fix flushing folio regression for 6.1 backport
   5
   6 filemap_get_folio works differenty in 6.1 vs. later kernels
   7 (returning NULL in 6.1 instead of an error).  Add
   8 this minor correction which addresses the regression in the patch:
   9   cifs: Fix flushing, invalidation and file size with copy_file_range()
  10
  11 Link: https://lore.kernel.org/all/a76b370f93cb928c049b94e1fde0d2da506dfcb2.camel@amazon.com/
  12 Reported-by: "Jitindar Singh, Suraj" <surajjs@amazon.com>
  13 Suggested-by: David Howells <dhowells@redhat.com>
  14 Reported-by: Salvatore Bonaccorso <carnil@debian.org>
  15 Signed-off-by: Steve French <stfrench@microsoft.com>
  16 Tested-by: Salvatore Bonaccorso <carnil@debian.org>
  17 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  18 ---
  19  fs/smb/client/cifsfs.c |    2 +-
  20  1 file changed, 1 insertion(+), 1 deletion(-)
  21
  22 --- a/fs/smb/client/cifsfs.c
  23 +++ b/fs/smb/client/cifsfs.c
  24 @@ -1240,7 +1240,7 @@ static int cifs_flush_folio(struct inode
  25         int rc = 0;
  26
  27         folio = filemap_get_folio(inode->i_mapping, index);
  28 -       if (IS_ERR(folio))
  29 +       if (!folio)
  30                 return 0;
  31
  32         size = folio_size(folio);