[PATCH review for 4.9 34/50] staging: lustre: llite: don't invoke direct_IO for the EOF case

From: Yang Sheng [ Upstream commit 77759771fb95420d23876cb104ab65c022613325 ] The function generic_file_read_iter() does not check EOF before invoke direct_IO callback. So we have to check it ourselves. Signed-off-by: Yang Sheng Intel-bug-id:

[PATCH review for 4.9 34/50] staging: lustre: llite: don't invoke direct_IO for the EOF case

From: Yang Sheng [ Upstream commit 77759771fb95420d23876cb104ab65c022613325 ] The function generic_file_read_iter() does not check EOF before invoke direct_IO callback. So we have to check it ourselves. Signed-off-by: Yang Sheng Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8969