From dc9682a0cca5018a64eefe1630f204fe4fbfebcc Mon Sep 17 00:00:00 2001
From: Ping-Ke Shih <pkshih@realtek.com>
Date: Mon, 13 Nov 2017 17:39:34 +0800
Subject: [PATCH] rtlwifi: fix the wrong size to calculate fifo space
Git-commit: dc9682a0cca5018a64eefe1630f204fe4fbfebcc
Patch-mainline: v4.16-rc1
References: FATE#326906
Give correct fifo size to calculate fifo space. Fortunately, the values of
RTL_PCI_MAX_RX_COUNT and TX_DESC_NUM_92E are the same in old code, so it
still works.
Signed-off-by: Steven Ting <steventing@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/realtek/rtlwifi/pci.h | 4 ++--
drivers/net/wireless/realtek/rtlwifi/rtl8192ee/trx.c | 6 ++++--
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtlwifi/pci.h b/drivers/net/wireless/realtek/rtlwifi/pci.h
index e7d070e8da2d..ed5de1218bd9 100644
--- a/drivers/net/wireless/realtek/rtlwifi/pci.h
+++ b/drivers/net/wireless/realtek/rtlwifi/pci.h
@@ -320,10 +320,10 @@ static inline void pci_write32_async(struct rtl_priv *rtlpriv,
writel(val, (u8 __iomem *)rtlpriv->io.pci_mem_start + addr);
}
-static inline u16 calc_fifo_space(u16 rp, u16 wp)
+static inline u16 calc_fifo_space(u16 rp, u16 wp, u16 size)
{
if (rp <= wp)
- return RTL_PCI_MAX_RX_COUNT - 1 + rp - wp;
+ return size - 1 + rp - wp;
return rp - wp - 1;
}
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/trx.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/trx.c
index 12255682e890..bc44d9d912d8 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/trx.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/trx.c
@@ -498,7 +498,8 @@ u16 rtl92ee_rx_desc_buff_remained_cnt(struct ieee80211_hw *hw, u8 queue_index)
if (!start_rx)
return 0;
- remind_cnt = calc_fifo_space(read_point, write_point);
+ remind_cnt = calc_fifo_space(read_point, write_point,
+ RTL_PCI_MAX_RX_COUNT);
if (remind_cnt == 0)
return 0;
@@ -560,7 +561,8 @@ u16 rtl92ee_get_available_desc(struct ieee80211_hw *hw, u8 q_idx)
current_tx_write_point = (u16)((tmp_4byte) & 0x0fff);
point_diff = calc_fifo_space(current_tx_read_point,
- current_tx_write_point);
+ current_tx_write_point,
+ TX_DESC_NUM_92E);
rtlpci->tx_ring[q_idx].avl_desc = point_diff;
return point_diff;
--
2.19.2