diff mbox series

[2/2] wifi: rtw88: Don't use static local variable in rtw8821c_set_tx_power_index_by_rate

Message ID fe42858c-9b9f-4f03-9aaa-737472c2cd90@gmail.com (mailing list archive)
State New
Delegated to: Ping-Ke Shih
Headers show
Series [1/2] wifi: rtw88: Don't use static local variable in rtw8822b_set_tx_power_index_by_rate | expand

Commit Message

Bitterblue Smith Jan. 26, 2025, 2:04 p.m. UTC 
Some users want to plug two identical USB devices at the same time.
This static variable could theoretically cause them to use incorrect
TX power values.

Move the variable to the caller and pass a pointer to it to
rtw8821c_set_tx_power_index_by_rate().

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
---
 drivers/net/wireless/realtek/rtw88/rtw8821c.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

Comments

Ping-Ke Shih Jan. 27, 2025, 6:04 a.m. UTC | #1 
Bitterblue Smith <rtl8821cerfe2@gmail.com> worte:
> Some users want to plug two identical USB devices at the same time.
> This static variable could theoretically cause them to use incorrect
> TX power values.
> 
> Move the variable to the caller and pass a pointer to it to
> rtw8821c_set_tx_power_index_by_rate().
> 
> Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>

Acked-by: Ping-Ke Shih <pkshih@realtek.com>
diff mbox series

Patch

diff --git a/drivers/net/wireless/realtek/rtw88/rtw8821c.c b/drivers/net/wireless/realtek/rtw88/rtw8821c.c
index eb7e34c545d0..cc152248407c 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8821c.c
+++ b/drivers/net/wireless/realtek/rtw88/rtw8821c.c
@@ -680,11 +680,11 @@  static void query_phy_status(struct rtw_dev *rtwdev, u8 *phy_status,
 }
 
 static void
-rtw8821c_set_tx_power_index_by_rate(struct rtw_dev *rtwdev, u8 path, u8 rs)
+rtw8821c_set_tx_power_index_by_rate(struct rtw_dev *rtwdev, u8 path,
+				    u8 rs, u32 *phy_pwr_idx)
 {
 	struct rtw_hal *hal = &rtwdev->hal;
 	static const u32 offset_txagc[2] = {0x1d00, 0x1d80};
-	static u32 phy_pwr_idx;
 	u8 rate, rate_idx, pwr_index, shift;
 	int j;
 
@@ -692,12 +692,12 @@  rtw8821c_set_tx_power_index_by_rate(struct rtw_dev *rtwdev, u8 path, u8 rs)
 		rate = rtw_rate_section[rs][j];
 		pwr_index = hal->tx_pwr_tbl[path][rate];
 		shift = rate & 0x3;
-		phy_pwr_idx |= ((u32)pwr_index << (shift * 8));
+		*phy_pwr_idx |= ((u32)pwr_index << (shift * 8));
 		if (shift == 0x3 || rate == DESC_RATEVHT1SS_MCS9) {
 			rate_idx = rate & 0xfc;
 			rtw_write32(rtwdev, offset_txagc[path] + rate_idx,
-				    phy_pwr_idx);
-			phy_pwr_idx = 0;
+				    *phy_pwr_idx);
+			*phy_pwr_idx = 0;
 		}
 	}
 }
@@ -705,6 +705,7 @@  rtw8821c_set_tx_power_index_by_rate(struct rtw_dev *rtwdev, u8 path, u8 rs)
 static void rtw8821c_set_tx_power_index(struct rtw_dev *rtwdev)
 {
 	struct rtw_hal *hal = &rtwdev->hal;
+	u32 phy_pwr_idx = 0;
 	int rs, path;
 
 	for (path = 0; path < hal->rf_path_num; path++) {
@@ -712,7 +713,8 @@  static void rtw8821c_set_tx_power_index(struct rtw_dev *rtwdev)
 			if (rs == RTW_RATE_SECTION_HT_2S ||
 			    rs == RTW_RATE_SECTION_VHT_2S)
 				continue;
-			rtw8821c_set_tx_power_index_by_rate(rtwdev, path, rs);
+			rtw8821c_set_tx_power_index_by_rate(rtwdev, path, rs,
+							    &phy_pwr_idx);
 		}
 	}
 }