linux-kernel - [PATCH v1 5/5] ath5k: fix ah_txq_isr_txok

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Date:   Mon, 10 Jan 2022 23:30:21 +0100
From:   Peter Seiderer <ps.report@....net>
To:     linux-wireless@...r.kernel.org
Cc:     Jiri Slaby <jirislaby@...nel.org>,
        Nick Kossifidis <mickflemm@...il.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Kalle Valo <kvalo@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 5/5] ath5k: fix ah_txq_isr_txok_all setting

The struct ath5k_hw member ah_txq_isr_txok_all is never reset/assigned
outside of ath5k_hw_get_isr() and with the used bitwise-or in the
interrupt handling accumulates all ever set interrupt flags.

Fix this by clearing ah_txq_isr_txok_all before assigning.

Patch tested with Senao NMP-8602 card

  Qualcomm Atheros AR5413/AR5414 Wireless Network Adapter [AR5006X(S) 802.11abg] (rev 01)
  ath5k: phy6: Atheros AR5413 chip found (MAC: 0xa4, PHY: 0x61)

running IBSS mode against Atheros (ath9k) card using
ping and iperf traffic.

Signed-off-by: Peter Seiderer <ps.report@....net>
---
 drivers/net/wireless/ath/ath5k/dma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/ath/ath5k/dma.c b/drivers/net/wireless/ath/ath5k/dma.c
index 2b135a6284a0..d9e376eb040e 100644
--- a/drivers/net/wireless/ath/ath5k/dma.c
+++ b/drivers/net/wireless/ath/ath5k/dma.c
@@ -650,6 +650,7 @@ ath5k_hw_get_isr(struct ath5k_hw *ah, enum ath5k_int *interrupt_mask)
 		 */
 		*interrupt_mask = (pisr & AR5K_INT_COMMON) & ah->ah_imr;
 
+		ah->ah_txq_isr_txok_all = 0;
 
 		/* We treat TXOK,TXDESC, TXERR and TXEOL
 		 * the same way (schedule the tx tasklet)
-- 
2.34.1