diff options
| author | Takuma Ueba <t.ueba11@gmail.com> | 2015-12-31 14:58:14 +0900 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2016-02-24 14:56:42 -0800 |
| commit | b72f3f72005dfd649d787535bd04ada3b3f1b3ba (patch) | |
| tree | a37d73261628a48be9f3a5b5973103996e78d3e5 /drivers/net/ethernet/intel/igb/e1000_82575.c | |
| parent | 9cd34b3a1cfd47692cbef8cb0761475021883e18 (diff) | |
| download | linux-b72f3f72005dfd649d787535bd04ada3b3f1b3ba.tar.bz2 | |
igb: When GbE link up, wait for Remote receiver status condition
I210 device IPv6 autoconf test sometimes fails,
because DAD NS for link-local is not transmitted.
This packet is silently dropped.
This problem is seen only GbE environment.
igb_watchdog_task link up detection continues to the following process.
The following cases are observed:
1.PHY 1000BASE-T Status Register Remote receiver status bit is NG.
(NG status becomes OK after about 200 - 700ms)
2.In this case, the transfer packet is silently dropped.
1000BASE-T Status register
[Expected]: 0x3800 or 0x7800
[problem occurred]: 0x2800 or 0x6800
Frequency of occurrence: approx 1/10 - 1/40 observed
In order to avoid this problem,
wait until 1000BASE-T Status register "Remote receiver status OK"
After applying this patch, at least 400 runs succeed with no problems.
Signed-off-by: Takuma Ueba <t.ueba11@gmail.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/igb/e1000_82575.c')
0 files changed, 0 insertions, 0 deletions