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authorVasanthakumar Thiagarajan <vasanth@atheros.com>2009-08-31 17:48:36 +0530
committerJohn W. Linville <linville@tuxdriver.com>2009-08-31 14:42:15 -0400
commit1c29ce672fe817c208309eea0c1ff7bf76250f15 (patch)
tree4f01db66751551ce2089faf67bb4fcb49c750d67
parent3107edbae8216a80920bed7f8d4ec2e6b62390f2 (diff)
ath9k: Do an AHB reset before doing RTC resetmaster-2009-08-31
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>
-rw-r--r--drivers/net/wireless/ath/ath9k/hw.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index e340dacc6eb..71f27f324ce 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -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,