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From 53b8698d406d7952fb5e11f78ea0189176388927 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
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