[PATCH 1/2] netdev: octeon_mgmt: Correct tx IFG workaround.

[David Daney <ddaney.cavm@gmail.com>]

From: David Daney <david.daney@cavium.com>

The previous fix was still too agressive to meet ieee specs.  Increase
to (14, 10).

Signed-off-by: David Daney <david.daney@cavium.com>
---
 drivers/net/ethernet/octeon/octeon_mgmt.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/octeon/octeon_mgmt.c b/drivers/net/ethernet/octeon/octeon_mgmt.c
index e6e0292..1ef4148 100644
--- a/drivers/net/ethernet/octeon/octeon_mgmt.c
+++ b/drivers/net/ethernet/octeon/octeon_mgmt.c
@@ -1141,10 +1141,13 @@ static int octeon_mgmt_open(struct net_device *netdev)
 		/* For compensation state to lock. */
 		ndelay(1040 * NS_PER_PHY_CLK);
 
-		/* Some Ethernet switches cannot handle standard
-		 * Interframe Gap, increase to 16 bytes.
+		/* Default Interframe Gaps are too small.  Recommended
+		 * workaround is.
+		 *
+		 * AGL_GMX_TX_IFG[IFG1]=14
+		 * AGL_GMX_TX_IFG[IFG2]=10
 		 */
-		cvmx_write_csr(CVMX_AGL_GMX_TX_IFG, 0x88);
+		cvmx_write_csr(CVMX_AGL_GMX_TX_IFG, 0xae);
 	}
 
 	octeon_mgmt_rx_fill_ring(netdev);
-- 
1.7.11.7