Patch "sfc: provide dummy definitions of vswitch functions" has been added to the 4.4-stable tree

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

sfc: provide dummy definitions of vswitch functions

to the 4.4-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:
sfc-provide-dummy-definitions-of-vswitch-functions.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Bert Kenward <[email protected]>
Date: Fri, 16 Jun 2017 09:45:08 +0100
Subject: sfc: provide dummy definitions of vswitch functions

From: Bert Kenward <[email protected]>

efx_probe_all() calls efx->type->vswitching_probe during probe. For SFC4000 (Falcon) NICs this function is not defined, leading to a BUG with the top of the call stack similar to:

  ? efx_pci_probe_main+0x29a/0x830
  efx_pci_probe+0x7d3/0xe70

vswitching_restore and vswitching_remove also need to be defined.

Fixed in mainline by:
commit 5a6681e22c14 ("sfc: separate out SFC4000 ("Falcon") support into new sfc-falcon driver")

---
 drivers/net/ethernet/sfc/falcon.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

@@ -2796,6 +2796,11 @@ const struct efx_nic_type falcon_a1_nic_
 	.timer_period_max =  1 << FRF_AB_TC_TIMER_VAL_WIDTH,
 	.offload_features = NETIF_F_IP_CSUM,
 	.mcdi_max_ver = -1,
+#ifdef CONFIG_SFC_SRIOV
+	.vswitching_probe = efx_port_dummy_op_int,
+	.vswitching_restore = efx_port_dummy_op_int,
+	.vswitching_remove = efx_port_dummy_op_void,
+#endif
 };
 
 const struct efx_nic_type falcon_b0_nic_type = {

@@ -2897,4 +2902,9 @@ const struct efx_nic_type falcon_b0_nic_
 	.offload_features = NETIF_F_IP_CSUM | NETIF_F_RXHASH | NETIF_F_NTUPLE,
 	.mcdi_max_ver = -1,
 	.max_rx_ip_filters = FR_BZ_RX_FILTER_TBL0_ROWS,
+#ifdef CONFIG_SFC_SRIOV
+	.vswitching_probe = efx_port_dummy_op_int,
+	.vswitching_restore = efx_port_dummy_op_int,
+	.vswitching_remove = efx_port_dummy_op_void,
+#endif
 };

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/sfc-provide-dummy-definitions-of-vswitch-functions.patch