Patch "be2net: restore properly promisc mode after queues reconfiguration" has been added to the 4.14-stable tree

Patch "be2net: restore properly promisc mode after queues reconfiguration" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    be2net: restore properly promisc mode after queues reconfiguration

to the 4.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     be2net-restore-properly-promisc-mode-after-queues-reconfiguration.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Sun Jan 28 17:35:08 CET 2018
From: Ivan Vecera <cera@cera.cz>
Date: Fri, 19 Jan 2018 20:23:50 +0100
Subject: be2net: restore properly promisc mode after queues reconfiguration

From: Ivan Vecera <cera@cera.cz>


[ Upstream commit 52acf06451930eb4cefabd5ecea56e2d46c32f76 ]

The commit 622190669403 ("be2net: Request RSS capability of Rx interface
depending on number of Rx rings") modified be_update_queues() so the
IFACE (HW representation of the netdevice) is destroyed and then
re-created. This causes a regression because potential promiscuous mode
is not restored properly during be_open() because the driver thinks
that the HW has promiscuous mode already enabled.

Note that Lancer is not affected by this bug because RX-filter flags are
disabled during be_close() for this chipset.

Cc: Sathya Perla <sathya.perla@broadcom.com>
Cc: Ajit Khaparde <ajit.khaparde@broadcom.com>
Cc: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Cc: Somnath Kotur <somnath.kotur@broadcom.com>

Fixes: 622190669403 ("be2net: Request RSS capability of Rx interface depending on number of Rx rings")
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/emulex/benet/be_main.c |    9 +++++++++
 1 file changed, 9 insertions(+)

--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -4634,6 +4634,15 @@ int be_update_queues(struct be_adapter *
 
 	be_schedule_worker(adapter);
 
+	/*
+	 * The IF was destroyed and re-created. We need to clear
+	 * all promiscuous flags valid for the destroyed IF.
+	 * Without this promisc mode is not restored during
+	 * be_open() because the driver thinks that it is
+	 * already enabled in HW.
+	 */
+	adapter->if_flags &= ~BE_IF_FLAGS_ALL_PROMISCUOUS;
+
 	if (netif_running(netdev))
 		status = be_open(netdev);
 


Patches currently in stable-queue which might be from cera@cera.cz are

queue-4.14/be2net-restore-properly-promisc-mode-after-queues-reconfiguration.patch