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authorSven Eckelmann <sven@narfation.org>2012-09-27 16:41:02 +0200
committerJohn W. Linville <linville@tuxdriver.com>2012-09-28 13:54:10 -0400
commitff9bd2d8d95aedb661714536cb919281540f9772 (patch)
tree69ebff87dee8e48fd1fb707a07f799e5536f6291 /drivers/net/wireless
parent6c8c4f7299b89ef369fd332e5f76c2fd23a62abe (diff)
ath9k_hw: Handle AR_INTR_SYNC_HOST1_(FATAL|PERR) on AR9003
Interrupts with the sync_cause AR_INTR_SYNC_HOST1_FATAL and AR_INTR_SYNC_HOST1_PERR have to be handled using a chip reset. Otherwise a interrupt storm with unhandled interrupts will cause a hang or crash of the machine. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless')
-rw-r--r--drivers/net/wireless/ath/ath9k/ar9003_mac.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mac.c b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
index d5b2e0ecc21c..301bf72c53bf 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_mac.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mac.c
@@ -182,6 +182,7 @@ static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath_common *common = ath9k_hw_common(ah);
u32 sync_cause = 0, async_cause, async_mask = AR_INTR_MAC_IRQ;
+ bool fatal_int;
if (ath9k_hw_mci_is_enabled(ah))
async_mask |= AR_INTR_ASYNC_MASK_MCI;
@@ -310,6 +311,22 @@ static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
if (sync_cause) {
ath9k_debug_sync_cause(common, sync_cause);
+ fatal_int =
+ (sync_cause &
+ (AR_INTR_SYNC_HOST1_FATAL | AR_INTR_SYNC_HOST1_PERR))
+ ? true : false;
+
+ if (fatal_int) {
+ if (sync_cause & AR_INTR_SYNC_HOST1_FATAL) {
+ ath_dbg(common, ANY,
+ "received PCI FATAL interrupt\n");
+ }
+ if (sync_cause & AR_INTR_SYNC_HOST1_PERR) {
+ ath_dbg(common, ANY,
+ "received PCI PERR interrupt\n");
+ }
+ *masked |= ATH9K_INT_FATAL;
+ }
if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) {
REG_WRITE(ah, AR_RC, AR_RC_HOSTIF);