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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>
CC:     Tsang-Shian Lin <thlin@realtek.com>,
        Ping-Ke Shih <pkshih@realtek.com>,
        Larry Finger <Larry.Finger@lwfinger.net>,
        Yan-Hsuan Chuang <yhchuang@realtek.com>,
        Birming Chiu <birming@realtek.com>,
        Shaofu <shaofu@realtek.com>,
        Steven Ting <steventing@realtek.com>,
        Kalle Valo <kvalo@codeaurora.org>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.14 14/67] rtlwifi: rtl_pci: Fix the bug when
 inactiveps is enabled.
Thread-Topic: [PATCH AUTOSEL for 4.14 14/67] rtlwifi: rtl_pci: Fix the bug
 when inactiveps is enabled.
Thread-Index: AQHTtpn60EU5v5Tz8UWACyiHGylgeA==
Date:   Thu, 8 Mar 2018 04:57:37 +0000
Message-ID: <20180308045641.7814-14-alexander.levin@microsoft.com>
References: <20180308045641.7814-1-alexander.levin@microsoft.com>
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From: Tsang-Shian Lin <thlin@realtek.com>

[ Upstream commit b7573a0a27bfa8270dea9b145448f6884b7cacc1 ]

Reset the driver current tx read/write index to zero when inactiveps
nic out of sync with HW state. Wrong driver tx read/write index will
cause Tx fail.

Signed-off-by: Tsang-Shian Lin <thlin@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Yan-Hsuan Chuang <yhchuang@realtek.com>
Cc: Birming Chiu <birming@realtek.com>
Cc: Shaofu <shaofu@realtek.com>
Cc: Steven Ting <steventing@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/net/wireless/realtek/rtlwifi/pci.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtlwifi/pci.c b/drivers/net/wirel=
ess/realtek/rtlwifi/pci.c
index 08dc8919ef60..d7331225c5f3 100644
--- a/drivers/net/wireless/realtek/rtlwifi/pci.c
+++ b/drivers/net/wireless/realtek/rtlwifi/pci.c
@@ -1568,7 +1568,14 @@ int rtl_pci_reset_trx_ring(struct ieee80211_hw *hw)
 				dev_kfree_skb_irq(skb);
 				ring->idx =3D (ring->idx + 1) % ring->entries;
 			}
+
+			if (rtlpriv->use_new_trx_flow) {
+				rtlpci->tx_ring[i].cur_tx_rp =3D 0;
+				rtlpci->tx_ring[i].cur_tx_wp =3D 0;
+			}
+
 			ring->idx =3D 0;
+			ring->entries =3D rtlpci->txringcount[i];
 		}
 	}
 	spin_unlock_irqrestore(&rtlpriv->locks.irq_th_lock, flags);
--=20
2.14.1