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ath9k_hw: Handle AR_INTR_SYNC_HOST1_(FATAL|PERR) on AR9003

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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>
This commit is contained in:
Sven Eckelmann 2012-09-27 16:41:02 +02:00 committed by John W. Linville
parent 6c8c4f7299
commit ff9bd2d8d9
1 changed files with 17 additions and 0 deletions
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17
drivers/net/wireless/ath/ath9k/ar9003_mac.c
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@ -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);