openwrtv4/package/kernel/mac80211/patches/541-ath9k_rx_dma_stop_check.patch
Felix Fietkau d45a1618eb ath9k: add some cleanups and minor fixes
Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 38354
2013-10-10 14:31:22 +00:00

28 lines
821 B
Diff

--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -701,7 +701,7 @@ bool ath9k_hw_stopdmarecv(struct ath_hw
{
#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 */
@@ -731,6 +731,16 @@ bool ath9k_hw_stopdmarecv(struct ath_hw
}
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,