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Subject[PATCH 4.9 50/66] be2net: restore properly promisc mode after queues reconfiguration
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

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
@@ -4733,6 +4733,15 @@ 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);


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