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-rw-r--r--ath9k-rx-dma-stop-check.patch42
1 files changed, 42 insertions, 0 deletions
diff --git a/ath9k-rx-dma-stop-check.patch b/ath9k-rx-dma-stop-check.patch
new file mode 100644
index 000000000..49a20d335
--- /dev/null
+++ b/ath9k-rx-dma-stop-check.patch
@@ -0,0 +1,42 @@
+From dfc1afd652976a77e8fcfb57866ad0f29b50d042 Mon Sep 17 00:00:00 2001
+From: "kernel-team@fedoraproject.org" <kernel-team@fedoraproject.org>
+Date: Wed, 6 Feb 2013 09:57:47 -0500
+Subject: [PATCH] ath9k: rx dma stop check
+
+---
+ drivers/net/wireless/ath/ath9k/mac.c | 12 +++++++++++-
+ 1 file changed, 11 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
+index 275205ab5f15..bb842623bdf6 100644
+--- a/drivers/net/wireless/ath/ath9k/mac.c
++++ b/drivers/net/wireless/ath/ath9k/mac.c
+@@ -700,7 +700,7 @@ bool ath9k_hw_stopdmarecv(struct ath_hw *ah, bool *reset)
+ {
+ #define AH_RX_STOP_DMA_TIMEOUT 10000 /* usec */
+ struct ath_common *common = ath9k_hw_common(ah);
+- u32 mac_status, last_mac_status = 0;
++ u32 mac_status = 0, last_mac_status = 0;
+ int i;
+
+ /* Enable access to the DMA observation bus */
+@@ -730,6 +730,16 @@ bool ath9k_hw_stopdmarecv(struct ath_hw *ah, bool *reset)
+ }
+
+ if (i == 0) {
++ if (!AR_SREV_9300_20_OR_LATER(ah) &&
++ (mac_status & 0x700) == 0) {
++ /*
++ * DMA is idle but the MAC is still stuck
++ * processing events
++ */
++ *reset = true;
++ return true;
++ }
++
+ ath_err(common,
+ "DMA failed to stop in %d ms AR_CR=0x%08x AR_DIAG_SW=0x%08x DMADBG_7=0x%08x\n",
+ AH_RX_STOP_DMA_TIMEOUT / 1000,
+--
+1.9.3
+