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Commit 1c29ce67 authored by Vasanthakumar Thiagarajan's avatar Vasanthakumar Thiagarajan Committed by John W. Linville
Browse files

ath9k: Do an AHB reset before doing RTC reset 



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: default avatarVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 3107edba

drivers/net/wireless/ath/ath9k/hw.c

+7 −0
Original line number Diff line number Diff line
@@ -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,