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authorFelix Fietkau <nbd@openwrt.org>2015-06-02 08:47:21 +0000
committerFelix Fietkau <nbd@openwrt.org>2015-06-02 08:47:21 +0000
commit5c71763ccfa5cde01a510c9007718cd0114a18a7 (patch)
tree0778ab75132d8c50672ab59dd148dd37f17e7bd3
parentced63a693f3a9688277738fa6f2c3cb01167a253 (diff)
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ath9k: fix an issue with stopping rx/tx dma on AR93xx
Signed-off-by: Felix Fietkau <nbd@openwrt.org> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45874 3c298f89-4303-0410-b956-a3cf2f4a3e73
-rw-r--r--package/kernel/mac80211/patches/379-ath9k-fix-DMA-stop-sequence-for-AR9003.patch33
-rw-r--r--package/kernel/mac80211/patches/542-ath9k_debugfs_diag.patch2
2 files changed, 34 insertions, 1 deletions
diff --git a/package/kernel/mac80211/patches/379-ath9k-fix-DMA-stop-sequence-for-AR9003.patch b/package/kernel/mac80211/patches/379-ath9k-fix-DMA-stop-sequence-for-AR9003.patch
new file mode 100644
index 0000000000..814b0d7a4a
--- /dev/null
+++ b/package/kernel/mac80211/patches/379-ath9k-fix-DMA-stop-sequence-for-AR9003.patch
@@ -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;
+ }
diff --git a/package/kernel/mac80211/patches/542-ath9k_debugfs_diag.patch b/package/kernel/mac80211/patches/542-ath9k_debugfs_diag.patch
index 5264da018a..2803af49f3 100644
--- a/package/kernel/mac80211/patches/542-ath9k_debugfs_diag.patch
+++ b/package/kernel/mac80211/patches/542-ath9k_debugfs_diag.patch
@@ -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;