linux-kernel - [PATCH AUTOSEL for 4.4 082/101] rtlwifi: rtl_pci: Fix the bug when inactiveps is enabled.

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Date:   Thu, 8 Mar 2018 05:02:09 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Tsang-Shian Lin <thlin@...ltek.com>,
        Ping-Ke Shih <pkshih@...ltek.com>,
        Larry Finger <Larry.Finger@...inger.net>,
        Yan-Hsuan Chuang <yhchuang@...ltek.com>,
        Birming Chiu <birming@...ltek.com>,
        Shaofu <shaofu@...ltek.com>,
        Steven Ting <steventing@...ltek.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.4 082/101] rtlwifi: rtl_pci: Fix the bug when
 inactiveps is enabled.

From: Tsang-Shian Lin <thlin@...ltek.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@...ltek.com>
Signed-off-by: Ping-Ke Shih <pkshih@...ltek.com>
Signed-off-by: Larry Finger <Larry.Finger@...inger.net>
Cc: Yan-Hsuan Chuang <yhchuang@...ltek.com>
Cc: Birming Chiu <birming@...ltek.com>
Cc: Shaofu <shaofu@...ltek.com>
Cc: Steven Ting <steventing@...ltek.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.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/wireless/realtek/rtlwifi/pci.c
index c48b7e8ee0d6..b51815eccdb3 100644
--- a/drivers/net/wireless/realtek/rtlwifi/pci.c
+++ b/drivers/net/wireless/realtek/rtlwifi/pci.c
@@ -1572,7 +1572,14 @@ int rtl_pci_reset_trx_ring(struct ieee80211_hw *hw)
 				dev_kfree_skb_irq(skb);
 				ring->idx = (ring->idx + 1) % ring->entries;
 			}
+
+			if (rtlpriv->use_new_trx_flow) {
+				rtlpci->tx_ring[i].cur_tx_rp = 0;
+				rtlpci->tx_ring[i].cur_tx_wp = 0;
+			}
+
 			ring->idx = 0;
+			ring->entries = rtlpci->txringcount[i];
 		}
 	}
 	spin_unlock_irqrestore(&rtlpriv->locks.irq_th_lock, flags);
-- 
2.14.1