Patch "fm10k: ensure we process SM mbx when processing VF mbx" 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

fm10k: ensure we process SM mbx when processing VF mbx

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:
fm10k-ensure-we-process-sm-mbx-when-processing-vf-mbx.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: Jacob Keller <[email protected]>
Date: Mon, 2 Oct 2017 07:17:50 -0700
Subject: fm10k: ensure we process SM mbx when processing VF mbx

From: Jacob Keller <[email protected]>

[ 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.

---
 drivers/net/ethernet/intel/fm10k/fm10k_iov.c |    3 +++
 1 file changed, 3 insertions(+)

@@ -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 [email protected] are

queue-4.4/fm10k-ensure-we-process-sm-mbx-when-processing-vf-mbx.patch