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authorSenthil Balasubramanian <senthilkumar@atheros.com>2010-12-22 21:14:20 +0530
committerGreg Kroah-Hartman <gregkh@suse.de>2011-03-23 13:16:45 -0700
commit9390d630e93fd278b9838611ccd2074d61064762 (patch)
treeefd8345bf31d664caa70247d5404f1903e9c2297 /drivers/usb
parentd49bba0df98497d17e258462d6e41981556f82d0 (diff)
downloadlinux-linaro-stable-9390d630e93fd278b9838611ccd2074d61064762.tar.gz
ath9k_hw: Fix incorrect macversion and macrev checks
commit ac45c12dfb3f727a5a7a3332ed9c11b4a5ab287e upstream. There are few places where we are checking for macversion and revsions before RTC is powered ON. However we are reading the macversion and revisions only after RTC is powered ON and so both macversion and revisions are actully zero and this leads to incorrect srev checks Incorrect srev checks can cause registers to be configured wrongly and can cause unexpected behavior. Fixing this seems to address the ASPM issue that we have observed. The laptop becomes very slow and hangs mostly with ASPM L1 enabled without this fix. fix this by reading the macversion and revisisons even before we start using them. There is no reason why should we delay reading this info until RTC is powered on as this is just a register information. Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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