Patch "fm10k: ensure we process SM mbx when processing VF mbx" has been added to the 4.14-stable tree

[<gregkh@linuxfoundation.org>]

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

    fm10k: ensure we process SM mbx when processing VF mbx

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:
     fm10k-ensure-we-process-sm-mbx-when-processing-vf-mbx.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 Wed Dec 20 18:17:52 CET 2017
From: Jacob Keller <jacob.e.keller@intel.com>
Date: Mon, 2 Oct 2017 07:17:50 -0700
Subject: fm10k: ensure we process SM mbx when processing VF mbx

From: Jacob Keller <jacob.e.keller@intel.com>


[ Upstream commit 17a91809942ca32c70026d2d5ba3348a2c4fdf8f ]

When we process VF mailboxes, the driver is likely going to also queue
up messages to the switch manager. This process merely queues up the
FIFO, but doesn't actually begin the transmission process. Because we
hold the mailbox lock during this VF processing, the PF<->SM mailbox is
not getting processed at this time. Ensure that we actually process the
PF<->SM mailbox in between each PF<->VF mailbox.

This should ensure prompt transmission of the messages queued up after
each VF message is received and handled.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/intel/fm10k/fm10k_iov.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/intel/fm10k/fm10k_iov.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_iov.c
@@ -126,6 +126,9 @@ process_mbx:
 		struct fm10k_mbx_info *mbx = &vf_info->mbx;
 		u16 glort = vf_info->glort;
 
+		/* process the SM mailbox first to drain outgoing messages */
+		hw->mbx.ops.process(hw, &hw->mbx);
+
 		/* verify port mapping is valid, if not reset port */
 		if (vf_info->vf_flags && !fm10k_glort_valid_pf(hw, glort))
 			hw->iov.ops.reset_lport(hw, vf_info);


Patches currently in stable-queue which might be from jacob.e.keller@intel.com are

queue-4.14/fm10k-fix-mis-ordered-parameters-in-declaration-for-.ndo_set_vf_bw.patch
queue-4.14/fm10k-ensure-we-process-sm-mbx-when-processing-vf-mbx.patch
queue-4.14/i40e-i40evf-spread-cpu-affinity-hints-across-online-cpus-only.patch