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| author | Dave Graham <david.graham@intel.com> | 2009-06-08 16:28:17 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-06-09 14:25:35 +0200 |
| commit | 23a2d1b233f535fc74f8dca66e488980b4db041b (patch) | |
| tree | 7c0102dfbfa8b789a4385d08151268a6fa3f8a3f /drivers/net/e1000e/defines.h | |
| parent | ieee802154: add simple HardMAC driver sample (diff) | |
| download | linux-23a2d1b233f535fc74f8dca66e488980b4db041b.tar.xz linux-23a2d1b233f535fc74f8dca66e488980b4db041b.zip | |
e1000e: Fixes possible phy corrupton on 82571 designs.
Phy corruption has been observed on 2-port 82571 adapters, and is root-caused
to lack of synchronization between the 2 driver instances, which conflict
when attempting to access the phy via the single MDIC register.
A semaphore exists for this purpose, and is now used on these designs. Because
PXE &/or EFI boot code (which we cannot expect to be built with this fix) may
leave the inter-instance semaphore in an invalid initial state when the driver
first loads, this fix also includes a one-time (per driver load) fix-up of the
semaphore initial state.
Signed-off-by: dave graham <david.graham@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/e1000e/defines.h')
| -rw-r--r-- | drivers/net/e1000e/defines.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/e1000e/defines.h b/drivers/net/e1000e/defines.h index 674a47e43034..8890c97e1120 100644 --- a/drivers/net/e1000e/defines.h +++ b/drivers/net/e1000e/defines.h @@ -376,6 +376,8 @@ #define E1000_SWSM_SWESMBI 0x00000002 /* FW Semaphore bit */ #define E1000_SWSM_DRV_LOAD 0x00000008 /* Driver Loaded Bit */ +#define E1000_SWSM2_LOCK 0x00000002 /* Secondary driver semaphore bit */ + /* Interrupt Cause Read */ #define E1000_ICR_TXDW 0x00000001 /* Transmit desc written back */ #define E1000_ICR_LSC 0x00000004 /* Link Status Change */ |