diff options
| author | Arjan van de Ven <arjan@linux.intel.com> | 2019-06-15 03:29:35 +0300 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2019-06-29 01:59:52 +0300 |
| commit | ab6973aed6200510662856afce5e3d1e386b7b64 (patch) | |
| tree | 74b592de1acbe608a78732baa5fb426c81ac7bb1 /drivers/net/ethernet/intel/e1000e/82571.c | |
| parent | af07adbb1cfc207b9ad2bacd40332723a7833f4a (diff) | |
| download | linux-ab6973aed6200510662856afce5e3d1e386b7b64.tar.xz | |
e1000e: Reduce boot time by tightening sleep ranges
The e1000e driver is a great user of the usleep_range() API,
and has nice ranges that in principle help power management.
However the ranges that are used only during system startup are
very long (and can add easily 100 msec to the boot time) while
the power savings of such long ranges is irrelevant due to the
one-off, boot only, nature of these functions.
This patch shrinks some of the longest ranges to be shorter
(while still using a power friendly 1 msec range); this saves
100msec+ of boot time on my BDW NUCs
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
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/82571.c')
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/82571.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/82571.c b/drivers/net/ethernet/intel/e1000e/82571.c index b9309302c29e..2c1bab377b2a 100644 --- a/drivers/net/ethernet/intel/e1000e/82571.c +++ b/drivers/net/ethernet/intel/e1000e/82571.c @@ -959,7 +959,7 @@ static s32 e1000_reset_hw_82571(struct e1000_hw *hw) ew32(TCTL, tctl); e1e_flush(); - usleep_range(10000, 20000); + usleep_range(10000, 11000); /* Must acquire the MDIO ownership before MAC reset. * Ownership defaults to firmware after a reset. |