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541-ath9k_rx_dma_stop_check.patch

541-ath9k_rx_dma_stop_check.patch 819 B
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  1. --- a/drivers/net/wireless/ath/ath9k/mac.c
    2. 

  2. +++ b/drivers/net/wireless/ath/ath9k/mac.c
    3. 

  3. @@ -695,7 +695,7 @@ bool ath9k_hw_stopdmarecv(struct ath_hw
    4. 

  4.  {
    5. 

  5.  #define AH_RX_STOP_DMA_TIMEOUT 10000   /* usec */
    6. 

  6.  	struct ath_common *common = ath9k_hw_common(ah);
    7. 

  7. -	u32 mac_status, last_mac_status = 0;
    8. 

  8. +	u32 mac_status = 0, last_mac_status = 0;
    9. 

  9.  	int i;
    10. 

  10.  
    11. 

  11.  	/* Enable access to the DMA observation bus */
    12. 

  12. @@ -725,6 +725,16 @@ bool ath9k_hw_stopdmarecv(struct ath_hw
    13. 

  13.  	}
    14. 

  14.  
    15. 

  15.  	if (i == 0) {
    16. 

  16. +		if (!AR_SREV_9300_20_OR_LATER(ah) &&
    17. 

  17. +		    (mac_status & 0x700) == 0) {
    18. 

  18. +			/*
    19. 

  19. +			 * DMA is idle but the MAC is still stuck
    20. 

  20. +			 * processing events
    21. 

  21. +			 */
    22. 

  22. +			*reset = true;
    23. 

  23. +			return true;
    24. 

  24. +		}
    25. 

  25. +
    26. 

  26.  		ath_err(common,
    27. 

  27.  			"DMA failed to stop in %d ms AR_CR=0x%08x AR_DIAG_SW=0x%08x DMADBG_7=0x%08x\n",
    28. 

  28.  			AH_RX_STOP_DMA_TIMEOUT / 1000,
    29.