linux-kernel - [PATCH] cifs: Remove redundant setting of NETFS_SREQ_HIT

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Message-ID: <1948331.1726495326@warthog.procyon.org.uk>
Date: Mon, 16 Sep 2024 15:02:06 +0100
From: David Howells <dhowells@...hat.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: dhowells@...hat.com, Christian Brauner <brauner@...nel.org>,
    Steve French <stfrench@...rosoft.com>,
    Paulo Alcantara <pc@...guebit.com>, Jeff Layton <jlayton@...nel.org>,
    linux-cifs@...r.kernel.org, netfs@...ts.linux.dev,
    linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] cifs: Remove redundant setting of NETFS_SREQ_HIT_EOF

Fix an upstream merge resolution issue[1].  The NETFS_SREQ_HIT_EOF flag,
and code to set it, got added via two different paths.  The original path
saw it added in the netfslib read improvements[2], but it was also added,
and slightly differently, in a fix that was committed before v6.11:

        1da29f2c39b67b846b74205c81bf0ccd96d34727
        netfs, cifs: Fix handling of short DIO read

However, the code added to smb2_readv_callback() to set the flag in didn't
get removed when the netfs read improvements series was rebased to take
account of the cifs fixes.  The proposed merge resolution[2] deleted it
rather than rebase the patches.

Fix this by removing the redundant lines.  Code to set the bit that derives
from the fix patch is still there, a few lines above in the source.

Fixes: 35219bc5c71f ("Merge tag 'vfs-6.12.netfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs")
Signed-off-by: David Howells <dhowells@...hat.com>
cc: Linus Torvalds <torvalds@...ux-foundation.org>
cc: Steve French <stfrench@...rosoft.com>
cc: Paulo Alcantara <pc@...guebit.com>
cc: Christian Brauner <brauner@...nel.org>
cc: Jeff Layton <jlayton@...nel.org>
cc: linux-cifs@...r.kernel.org
cc: netfs@...ts.linux.dev
cc: linux-fsdevel@...r.kernel.org
Link: https://lore.kernel.org/r/CAHk-=wjr8fxk20-wx=63mZruW1LTvBvAKya1GQ1EhyzXb-okMA@mail.gmail.com/ [1]
Link: https://lore.kernel.org/linux-fsdevel/20240913-vfs-netfs-39ef6f974061@brauner/ [2]
---
 fs/smb/client/smb2pdu.c |    2 --
 1 file changed, 2 deletions(-)

diff --git a/fs/smb/client/smb2pdu.c b/fs/smb/client/smb2pdu.c
index 95377bb91950..bb8ecbbe78af 100644
--- a/fs/smb/client/smb2pdu.c
+++ b/fs/smb/client/smb2pdu.c
@@ -4614,8 +4614,6 @@ smb2_readv_callback(struct mid_q_entry *mid)
 			      0, cifs_trace_rw_credits_read_response_clear);
 	rdata->credits.value = 0;
 	rdata->subreq.transferred += rdata->got_bytes;
-	if (rdata->subreq.start + rdata->subreq.transferred >= rdata->subreq.rreq->i_size)
-		__set_bit(NETFS_SREQ_HIT_EOF, &rdata->subreq.flags);
 	trace_netfs_sreq(&rdata->subreq, netfs_sreq_trace_io_progress);
 	INIT_WORK(&rdata->subreq.work, smb2_readv_worker);
 	queue_work(cifsiod_wq, &rdata->subreq.work);