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authorEmmanuel Grumbach <emmanuel.grumbach@intel.com>2013-12-24 14:15:41 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-06 11:08:17 -0800
commit50920a1dd85602169df04e38248fa582d523c039 (patch)
tree6269e8ddd2fbee4a9eb845fb3a46fdfcaf980f3d /Documentation/numastat.txt
parent38c963f2676af60291566a1ae470b09d293adccd (diff)
iwlwifi: pcie: enable oscillator for L1 exit
commit 2d93aee152b1758a94a18fe15d72153ba73b5679 upstream. Enabling the oscillator consumes slightly more power (100uA) but allows to make sure that we exit from L1 on time. Not doing so might lead to a PCIe specification violation since we might wake up from L1 at the wrong time. This issue has been identified on 3160 and 7260 only. On older NICs L1 off is not enabled, on newer NICs (7265), the issue is fixed. When the bug occurs the user sees that the NIC has disappeared from the PCI bridge, any access to the device returns 0xff. This fixes: https://bugzilla.kernel.org/show_bug.cgi?id=64541 and has been extensively discussed here: http://markmail.org/thread/mfmpzqt3r333n4bo Fixes: 99cd47142399 ("iwlwifi: add 7000 series device configuration") Reported-and-tested-by: wzyboy <wzyboy@wzyboy.org> Reviewed-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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