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| author | Todd Fujinaka <todd.fujinaka@intel.com> | 2014-05-03 06:41:37 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2014-05-27 02:09:57 -0700 |
| commit | 5e7ff970041321a26f2dc3aa41ba79e787fcf8f9 (patch) | |
| tree | 7e72236781a130581d00b17c738926975b79f2a3 /drivers/net/ethernet/intel/e1000e/e1000.h | |
| parent | b3e5bf1ff32cbc58c56675498565020460c683cd (diff) | |
| download | lwn-5e7ff970041321a26f2dc3aa41ba79e787fcf8f9.tar.gz lwn-5e7ff970041321a26f2dc3aa41ba79e787fcf8f9.zip | |
e1000e: 82574/82583 TimeSync errata for SYSTIM read
Due to a synchronization error, the value read from SYSTIML/SYSTIMH
might be incorrect.
Signed-off-by: Todd Fujinaka <todd.fujinaka@intel.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/e1000e/e1000.h')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/e1000.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/e1000.h b/drivers/net/ethernet/intel/e1000e/e1000.h index e27e60910949..63bde99a4ab4 100644 --- a/drivers/net/ethernet/intel/e1000e/e1000.h +++ b/drivers/net/ethernet/intel/e1000e/e1000.h @@ -391,6 +391,8 @@ s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca); * 25MHz 46-bit 2^46 / 10^9 / 3600 = 19.55 hours */ #define E1000_SYSTIM_OVERFLOW_PERIOD (HZ * 60 * 60 * 4) +#define E1000_MAX_82574_SYSTIM_REREADS 50 +#define E1000_82574_SYSTIM_EPSILON (1ULL << 35ULL) /* hardware capability, feature, and workaround flags */ #define FLAG_HAS_AMT (1 << 0) |