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ath9k: fix an issue with stopping rx/tx dma on AR93xx

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Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 45874
This commit is contained in:
Felix Fietkau 2015-06-02 08:47:21 +00:00
parent 91467cec6f
commit 913ca8200a
2 changed files with 34 additions and 1 deletions
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33
package/kernel/mac80211/patches/379-ath9k-fix-DMA-stop-sequence-for-AR9003.patch Normal file
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@ -0,0 +1,33 @@
From: Felix Fietkau <nbd@openwrt.org>
Date: Tue, 2 Jun 2015 10:35:46 +0200
Subject: [PATCH] ath9k: fix DMA stop sequence for AR9003+
AR93xx and newer needs to stop rx before tx to avoid getting the DMA
engine or MAC into a stuck state.
This should reduce/fix the occurence of "Failed to stop Tx DMA" logspam.
Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -216,11 +216,13 @@ static bool ath_prepare_reset(struct ath
ath_stop_ani(sc);
ath9k_hw_disable_interrupts(ah);
- if (!ath_drain_all_txq(sc))
- ret = false;
-
- if (!ath_stoprecv(sc))
- ret = false;
+ if (AR_SREV_9300_20_OR_LATER(ah)) {
+ ret &= ath_stoprecv(sc);
+ ret &= ath_drain_all_txq(sc);
+ } else {
+ ret &= ath_drain_all_txq(sc);
+ ret &= ath_stoprecv(sc);
+ }
return ret;
}

2
package/kernel/mac80211/patches/542-ath9k_debugfs_diag.patch
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@ -125,7 +125,7 @@
REG_SET_BIT(ah, AR_BTCOEX_WL_LNADIV, AR_BTCOEX_WL_LNADIV_FORCE_ON);
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -531,6 +531,11 @@ irqreturn_t ath_isr(int irq, void *dev)
@@ -533,6 +533,11 @@ irqreturn_t ath_isr(int irq, void *dev)
if (test_bit(ATH_OP_HW_RESET, &common->op_flags))
return IRQ_HANDLED;