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ath9k: Do an AHB reset before doing RTC reset

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Doing an RTC reset when DMA is active may corrupt memory,
make sure no DMA is active at this moment by doing an
AHB reset.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vasanthakumar Thiagarajan 2009-08-31 17:48:36 +05:30 committed by John W. Linville
parent 3107edbae8
commit 1c29ce672f
1 changed files with 7 additions and 0 deletions
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7
drivers/net/wireless/ath/ath9k/hw.c
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@ -1712,8 +1712,15 @@ static bool ath9k_hw_set_reset_power_on(struct ath_hw *ah)
REG_WRITE(ah, AR_RTC_FORCE_WAKE, AR_RTC_FORCE_WAKE_EN |
AR_RTC_FORCE_WAKE_ON_INT);
if (!AR_SREV_9100(ah))
REG_WRITE(ah, AR_RC, AR_RC_AHB);
REG_WRITE(ah, AR_RTC_RESET, 0);
udelay(2);
if (!AR_SREV_9100(ah))
REG_WRITE(ah, AR_RC, 0);
REG_WRITE(ah, AR_RTC_RESET, 1);
if (!ath9k_hw_wait(ah,