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From: Ping-Ke Shih <pkshih@realtek.com>
To: <kvalo@kernel.org>
Cc: <linux-wireless@vger.kernel.org>
Subject: [PATCH 2/2] wifi: rtw89: pci: correct TX resource checking in low power mode
Date: Wed, 24 Aug 2022 14:33:12 +0800	[thread overview]
Message-ID: <20220824063312.15784-2-pkshih@realtek.com> (raw)
In-Reply-To: <20220824063312.15784-1-pkshih@realtek.com>

Number of TX resource must be minimum of TX_BD and TX_WD. Only considering
TX_BD could drop TX packets pulled from mac80211 if TX_WD is unavailable.

Fixes: 52edbb9fb78a ("rtw89: ps: access TX/RX rings via another registers in low power mode")
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/pci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c
index 8a093e1cb328e..7bb1b494c5d15 100644
--- a/drivers/net/wireless/realtek/rtw89/pci.c
+++ b/drivers/net/wireless/realtek/rtw89/pci.c
@@ -926,10 +926,12 @@ u32 __rtw89_pci_check_and_reclaim_tx_resource_noio(struct rtw89_dev *rtwdev,
 {
 	struct rtw89_pci *rtwpci = (struct rtw89_pci *)rtwdev->priv;
 	struct rtw89_pci_tx_ring *tx_ring = &rtwpci->tx_rings[txch];
+	struct rtw89_pci_tx_wd_ring *wd_ring = &tx_ring->wd_ring;
 	u32 cnt;
 
 	spin_lock_bh(&rtwpci->trx_lock);
 	cnt = rtw89_pci_get_avail_txbd_num(tx_ring);
+	cnt = min(cnt, wd_ring->curr_num);
 	spin_unlock_bh(&rtwpci->trx_lock);
 
 	return cnt;
-- 
2.25.1


  reply	other threads:[~2022-08-24  6:33 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-24  6:33 [PATCH 1/2] wifi: rtw89: pci: fix interrupt stuck after leaving low power mode Ping-Ke Shih
2022-08-24  6:33 ` Ping-Ke Shih [this message]
2022-08-29 16:07 ` Kalle Valo
2022-09-02  8:37 ` Kalle Valo

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