path: root/drivers/net
diff options
authorFelix Fietkau <nbd@openwrt.org>2010-07-11 12:48:42 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-07-12 16:05:38 -0400
commit9cc2f3e881dcda5466c55ffe8dd0a9d1433469cb (patch)
tree0e896791d624aec7cd519bda0540911282548601 /drivers/net
parentath9k_hw: fix an off-by-one error in the PDADC boundaries calculation (diff)
ath9k_hw: prevent a fast channel change after a rx DMA stuck issue
If the receive path gets stuck, a full hardware reset is necessary to recover from it. If this happens during a scan, the whole scan might fail, as each channel change bypasses the full reset sequence. Fix this by resetting the fast channel change flag if stopping the receive path fails. This will reduce the number of error messages that look like this: ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x40000020 Signed-off-by: Felix Fietkau <nbd@openwrt.org> Cc: stable@kernel.org Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net')
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 2acd79985599..2f83f975b891 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1232,9 +1232,11 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
if (!ah->chip_fullsleep) {
- if (!ath9k_hw_stopdmarecv(ah))
+ if (!ath9k_hw_stopdmarecv(ah)) {
ath_print(common, ATH_DBG_XMIT,
"Failed to stop receive dma\n");
+ bChannelChange = false;
+ }
if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE))