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[net-next,12/18] ixgbe: Update ixgbe_disable_pcie_master flow for X550*

Message ID 1443077981-55791-13-git-send-email-jeffrey.t.kirsher@intel.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Kirsher, Jeffrey T Sept. 24, 2015, 6:59 a.m. UTC 
From: Mark Rustad <mark.d.rustad@intel.com>

This patch skips the PCI transactions pending check in
ixgbe_disable_pcie_master. This is done to addresses a known HW
issue where the PCI transactions pending bit sticks high when there
are pending transactions. HW engineering instructed to workaround
this issue by wait and then continue with our reset flow.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_common.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
index 2cd0c3a..b620d7a 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
@@ -2476,6 +2476,9 @@  static s32 ixgbe_disable_pcie_master(struct ixgbe_hw *hw)
 	hw_dbg(hw, "GIO Master Disable bit didn't clear - requesting resets\n");
 	hw->mac.flags |= IXGBE_FLAGS_DOUBLE_RESET_REQUIRED;
 
+	if (hw->mac.type >= ixgbe_mac_X550)
+		return 0;
+
 	/*
 	 * Before proceeding, make sure that the PCIe block does not have
 	 * transactions pending.