Commit 9cc2f3e8 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville

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: default avatarFelix Fietkau <nbd@openwrt.org>
Cc: stable@kernel.org
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 03b4776c
...@@ -1232,9 +1232,11 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan, ...@@ -1232,9 +1232,11 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
if (!ah->chip_fullsleep) { if (!ah->chip_fullsleep) {
ath9k_hw_abortpcurecv(ah); ath9k_hw_abortpcurecv(ah);
if (!ath9k_hw_stopdmarecv(ah)) if (!ath9k_hw_stopdmarecv(ah)) {
ath_print(common, ATH_DBG_XMIT, ath_print(common, ATH_DBG_XMIT,
"Failed to stop receive dma\n"); "Failed to stop receive dma\n");
bChannelChange = false;
}
} }
if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE)) if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE))
......
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