linux-kernel - [PATCH 3.12 10/58] ixgbe: fix broken PFC with X550

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Message-Id: <2dc65c727a5dfab09f0104f4b68989ad8d0ea946.1458125909.git.jslaby@suse.cz>
Date:	Wed, 16 Mar 2016 11:58:55 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Vasu Dev <vasu.dev@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 10/58] ixgbe: fix broken PFC with X550

From: Vasu Dev <vasu.dev@...el.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit cb78cf12d6e90f57f6e7d090867ef19b6a189dde upstream.

PFC is configuration is skipped for X550 devices due to a incorrect
device id check, fixing that to include X550 PFC configuration.

Signed-off-by: Vasu Dev <vasu.dev@...el.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c
index 05e23b80b5e3..a5cc8a674e06 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82599.c
@@ -222,13 +222,13 @@ s32 ixgbe_dcb_config_pfc_82599(struct ixgbe_hw *hw, u8 pfc_en, u8 *prio_tc)
 	reg |= IXGBE_MFLCN_DPF;
 
 	/*
-	 * X540 supports per TC Rx priority flow control.  So
-	 * clear all TCs and only enable those that should be
+	 * X540 & X550 supports per TC Rx priority flow control.
+	 * So clear all TCs and only enable those that should be
 	 * enabled.
 	 */
 	reg &= ~(IXGBE_MFLCN_RPFCE_MASK | IXGBE_MFLCN_RFCE);
 
-	if (hw->mac.type == ixgbe_mac_X540)
+	if (hw->mac.type >= ixgbe_mac_X540)
 		reg |= pfc_en << IXGBE_MFLCN_RPFCE_SHIFT;
 
 	if (pfc_en)
-- 
2.7.3