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ath9k_hw: Fix system hang when resuming from S3/S4 

The bit 6 & 7 of AR_WA (0x4004) should be enabled only
for the chips that are supporting L0s functionality
while resuming back from S3/S4.

Enabling these bits for AR9280 is causing system hang
within a few S3/S4-resume cycles.

Cc: stable@kernel.org
Cc: Jack Lee <jlee@atheros.com>
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan 2011-01-27 18:39:37 +05:30 committed by John W. Linville
parent a29091ecb4
commit 5b64aa72ea
1 changed files with 1 additions and 2 deletions
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3
drivers/net/wireless/ath/ath9k/ar9002_hw.c
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@ -426,9 +426,8 @@ static void ar9002_hw_configpcipowersave(struct ath_hw *ah,
} }
/* WAR for ASPM system hang */ /* WAR for ASPM system hang */
if (AR_SREV_9280(ah) || AR_SREV_9285(ah) || AR_SREV_9287(ah)) { if (AR_SREV_9285(ah) || AR_SREV_9287(ah))
val |= (AR_WA_BIT6 | AR_WA_BIT7); val |= (AR_WA_BIT6 | AR_WA_BIT7);
}
if (AR_SREV_9285E_20(ah)) if (AR_SREV_9285E_20(ah))
val |= AR_WA_BIT23; val |= AR_WA_BIT23;