From 79d1d2b8a34fd36e63cc7f5267cf79217a44edcc Mon Sep 17 00:00:00 2001
From: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Date: Tue, 19 Apr 2011 19:29:19 +0530
Subject: [PATCH] ath9k_hw: Disable INTR_HOST1_FATAL to avoid interrupt strom
with ar9430
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/ath/ath9k/hw.c | 6 +++++-
drivers/net/wireless/ath/ath9k/mac.c | 10 ++++++----
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 28076086f633..66566ef3b8a8 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -795,12 +795,16 @@ static void ath9k_hw_init_pll(struct ath_hw *ah,
static void ath9k_hw_init_interrupt_masks(struct ath_hw *ah,
enum nl80211_iftype opmode)
{
+ u32 sync_default = AR_INTR_SYNC_DEFAULT;
u32 imr_reg = AR_IMR_TXERR |
AR_IMR_TXURN |
AR_IMR_RXERR |
AR_IMR_RXORN |
AR_IMR_BCNMISC;
+ if (AR_SREV_9340(ah))
+ sync_default &= ~AR_INTR_SYNC_HOST1_FATAL;
+
if (AR_SREV_9300_20_OR_LATER(ah)) {
imr_reg |= AR_IMR_RXOK_HP;
if (ah->config.rx_intr_mitigation)
@@ -831,7 +835,7 @@ static void ath9k_hw_init_interrupt_masks(struct ath_hw *ah,
if (!AR_SREV_9100(ah)) {
REG_WRITE(ah, AR_INTR_SYNC_CAUSE, 0xFFFFFFFF);
- REG_WRITE(ah, AR_INTR_SYNC_ENABLE, AR_INTR_SYNC_DEFAULT);
+ REG_WRITE(ah, AR_INTR_SYNC_ENABLE, sync_default);
REG_WRITE(ah, AR_INTR_SYNC_MASK, 0);
}
diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 6f431cbff38a..d86b8393b8dd 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -793,10 +793,14 @@ EXPORT_SYMBOL(ath9k_hw_disable_interrupts);
void ath9k_hw_enable_interrupts(struct ath_hw *ah)
{
struct ath_common *common = ath9k_hw_common(ah);
+ u32 sync_default = AR_INTR_SYNC_DEFAULT;
if (!(ah->imask & ATH9K_INT_GLOBAL))
return;
+ if (AR_SREV_9340(ah))
+ sync_default &= ~AR_INTR_SYNC_HOST1_FATAL;
+
ath_dbg(common, ATH_DBG_INTERRUPT, "enable IER\n");
REG_WRITE(ah, AR_IER, AR_IER_ENABLE);
if (!AR_SREV_9100(ah)) {
@@ -805,10 +809,8 @@ void ath9k_hw_enable_interrupts(struct ath_hw *ah)
REG_WRITE(ah, AR_INTR_ASYNC_MASK, AR_INTR_MAC_IRQ);
- REG_WRITE(ah, AR_INTR_SYNC_ENABLE,
- AR_INTR_SYNC_DEFAULT);
- REG_WRITE(ah, AR_INTR_SYNC_MASK,
- AR_INTR_SYNC_DEFAULT);
+ REG_WRITE(ah, AR_INTR_SYNC_ENABLE, sync_default);
+ REG_WRITE(ah, AR_INTR_SYNC_MASK, sync_default);
}
ath_dbg(common, ATH_DBG_INTERRUPT, "AR_IMR 0x%x IER 0x%x\n",
REG_READ(ah, AR_IMR), REG_READ(ah, AR_IER));
--
2.34.1