[net,1/2] ixgbe: Fix Tx Hang issue with lldpad on 82598EB

Submitted by Jeff Kirsher on July 26, 2013, 12:46 p.m.

Details

Message ID 1374842796-28445-1-git-send-email-jeffrey.t.kirsher@intel.com
State Accepted
Delegated to: David Miller
Headers show

Commit Message

Jeff Kirsher July 26, 2013, 12:46 p.m.
From: Jacob Keller <jacob.e.keller@intel.com>

This patch fixes an issue with the 82598EB device, where lldpad is causing Tx
Hangs on the card as soon as it attempts to configure DCB for the device. The
adapter will continually Tx hang and reset in a loop.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Cc: Stable <stable@vger.kernel.org>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Tested-by: Jack Morgan <jack.morgan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82598.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Comments

David Miller July 28, 2013, 8:17 p.m.
From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Fri, 26 Jul 2013 05:46:35 -0700

> From: Jacob Keller <jacob.e.keller@intel.com>
> 
> This patch fixes an issue with the 82598EB device, where lldpad is causing Tx
> Hangs on the card as soon as it attempts to configure DCB for the device. The
> adapter will continually Tx hang and reset in a loop.
> 
> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
> Cc: Stable <stable@vger.kernel.org>
> Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
> Tested-by: Jack Morgan <jack.morgan@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Applied.
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diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82598.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82598.c
index ac78077..7a77f37 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82598.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_82598.c
@@ -108,9 +108,8 @@  s32 ixgbe_dcb_config_tx_desc_arbiter_82598(struct ixgbe_hw *hw,
 
 	/* Enable arbiter */
 	reg &= ~IXGBE_DPMCS_ARBDIS;
-	/* Enable DFP and Recycle mode */
-	reg |= (IXGBE_DPMCS_TDPAC | IXGBE_DPMCS_TRM);
 	reg |= IXGBE_DPMCS_TSOEF;
+
 	/* Configure Max TSO packet size 34KB including payload and headers */
 	reg |= (0x4 << IXGBE_DPMCS_MTSOS_SHIFT);