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ixgbe: show <2% for encoding loss on PCIe Gen3

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This patch updates the ixgbe_check_minimum_link function to correctly show that
there is some minor loss of encoding, even though we don't calculate it in the
max GT/s equation. It is small enough to not bother, but is better to report it
than not.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jacob Keller 2013-10-18 05:09:19 +00:00 committed by Jeff Kirsher
parent 27d9ce4fd0
commit 9f0a433ce6
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
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@ -245,7 +245,7 @@ static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
max_gts = 4 * width;
break;
case PCIE_SPEED_8_0GT:
/* 128b/130b encoding only reduces throughput by 1% */
/* 128b/130b encoding reduces throughput by less than 2% */
max_gts = 8 * width;
break;
default:
@ -263,7 +263,7 @@ static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
width,
(speed == PCIE_SPEED_2_5GT ? "20%" :
speed == PCIE_SPEED_5_0GT ? "20%" :
speed == PCIE_SPEED_8_0GT ? "N/a" :
speed == PCIE_SPEED_8_0GT ? "<2%" :
"Unknown"));
if (max_gts < expected_gts) {