iwlagn: Enable PCI L1 ACTIVE state after uCode has been loaded
authorGrumbach, Emmanuel <emmanuel.grumbach@intel.com>
Thu, 18 Nov 2010 11:47:38 +0000 (03:47 -0800)
committerWey-Yi Guy <wey-yi.w.guy@intel.com>
Thu, 2 Dec 2010 16:35:02 +0000 (08:35 -0800)
commite7cad69cdab4d6f0caadbcdd58b54214243ba98a
tree693e9ee779a7cee5e3ba07b044ed1040d05b3051
parent40b97c2fe96a476f1c228345f0c6a2d135a8b226
iwlagn: Enable PCI L1 ACTIVE state after uCode has been loaded

PCI L1 Active needs to be disabled while loading the uCode so that the bus
doesn't go to sleep. The enablement of L1 Active should be done after
the uCode has sent the ALIVE response. The enablement of L1 Active was
missing.
Enabling L1 Active allows to save power if the BIOS / bus driver allows
it.

I measured the power consumption while not associated and
idle/associated:
L1 Active disabled: 39 mA = 130mW
L1 Active enabled:   6 mA = 20 mW

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
drivers/net/wireless/iwlwifi/iwl-agn-ucode.c