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From: "kernel-team@fedoraproject.org" <kernel-team@fedoraproject.org>
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Date: Wed, 6 Feb 2013 09:57:47 -0500
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Subject: [PATCH] ath9k: rx dma stop check
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---
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drivers/net/wireless/ath/ath9k/mac.c | 12 +++++++++++-
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1 file changed, 11 insertions(+), 1 deletion(-)
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diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
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index bba85d1a6cd1..ebbee8f17130 100644
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--- a/drivers/net/wireless/ath/ath9k/mac.c
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+++ b/drivers/net/wireless/ath/ath9k/mac.c
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@@ -693,7 +693,7 @@ bool ath9k_hw_stopdmarecv(struct ath_hw *ah, bool *reset)
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{
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#define AH_RX_STOP_DMA_TIMEOUT 10000 /* usec */
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struct ath_common *common = ath9k_hw_common(ah);
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- u32 mac_status, last_mac_status = 0;
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+ u32 mac_status = 0, last_mac_status = 0;
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int i;
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/* Enable access to the DMA observation bus */
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@@ -723,6 +723,16 @@ bool ath9k_hw_stopdmarecv(struct ath_hw *ah, bool *reset)
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}
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if (i == 0) {
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+ if (!AR_SREV_9300_20_OR_LATER(ah) &&
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+ (mac_status & 0x700) == 0) {
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+ /*
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+ * DMA is idle but the MAC is still stuck
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+ * processing events
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+ */
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+ *reset = true;
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+ return true;
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+ }
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+
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ath_err(common,
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"DMA failed to stop in %d ms AR_CR=0x%08x AR_DIAG_SW=0x%08x DMADBG_7=0x%08x\n",
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AH_RX_STOP_DMA_TIMEOUT / 1000,
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