lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20230328131233.2534-3-jgross@suse.com>
Date:   Tue, 28 Mar 2023 15:12:32 +0200
From:   Juergen Gross <jgross@...e.com>
To:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Cc:     Juergen Gross <jgross@...e.com>, Wei Liu <wei.liu@...nel.org>,
        Paul Durrant <paul@....org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        xen-devel@...ts.xenproject.org, Jan Beulich <jbeulich@...e.com>
Subject: [PATCH v2 2/3] xen/netback: remove not needed test in xenvif_tx_build_gops()

The tests for the number of grant mapping or copy operations reaching
the array size of the operations buffer at the end of the main loop in
xenvif_tx_build_gops() isn't needed.

The loop can handle at maximum MAX_PENDING_REQS transfer requests, as
XEN_RING_NR_UNCONSUMED_REQUESTS() is taking unsent responses into
consideration, too.

Remove the tests.

Suggested-by: Jan Beulich <jbeulich@...e.com>
Signed-off-by: Juergen Gross <jgross@...e.com>
Reviewed-by: Paul Durrant <paul@....org>
---
 drivers/net/xen-netback/netback.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 54c76af90233..9ca4b69d3b39 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -1084,10 +1084,6 @@ static void xenvif_tx_build_gops(struct xenvif_queue *queue,
 		__skb_queue_tail(&queue->tx_queue, skb);
 
 		queue->tx.req_cons = idx;
-
-		if ((*map_ops >= ARRAY_SIZE(queue->tx_map_ops)) ||
-		    (*copy_ops >= ARRAY_SIZE(queue->tx_copy_ops)))
-			break;
 	}
 
 	return;
-- 
2.35.3

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ