[PATCH] rtlwifi: rtl8192ee: remove redundant for-loop

[PATCH] rtlwifi: rtl8192ee: remove redundant for-loop

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

The for-loop seems to be redundant, the assignments for indexes
0..2 are being over-written by the last index 3 in the loop. Remove
the loop and use index 3 instead.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 .../net/wireless/realtek/rtlwifi/rtl8192ee/phy.c   | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/phy.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/phy.c
index 6dba576aa81e..bb291b951f4d 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/phy.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/phy.c
@@ -2866,14 +2866,12 @@ void rtl92ee_phy_iq_calibrate(struct ieee80211_hw *hw, bool b_recovery)
 		}
 	}
 
-	for (i = 0; i < 4; i++) {
-		reg_e94 = result[i][0];
-		reg_e9c = result[i][1];
-		reg_ea4 = result[i][2];
-		reg_eb4 = result[i][4];
-		reg_ebc = result[i][5];
-		reg_ec4 = result[i][6];
-	}
+	reg_e94 = result[3][0];
+	reg_e9c = result[3][1];
+	reg_ea4 = result[3][2];
+	reg_eb4 = result[3][4];
+	reg_ebc = result[3][5];
+	reg_ec4 = result[3][6];
 
 	if (final_candidate != 0xff) {
 		reg_e94 = result[final_candidate][0];
-- 
2.25.1

AW: [PATCH] rtlwifi: rtl8192ee: remove redundant for-loop

[Walter Harms]

if someone has same spare time,
this driver need a bit more love ...

SO far i can see in rtl92ee_phy_iq_calibrate:
* IQK_MATRIX_REG_NUM should be used instead 8 hardcoded.
* the for-loop in the beginning is obfuscating that it sets  simply final_candidate

this can be cleaned:
      reg_e94 = result[final_candidate][0];
      rtlphy->reg_e94 = reg_e94;
      reg_e9c = result[final_candidate][1];
      rtlphy->reg_e9c = reg_e9c;

only reg_e94, reg_ea4 is used later ?

jm2c,
wh 

________________________________________
Von: kernel-janitors-owner@vger.kernel.org <kernel-janitors-owner@vger.kernel.org> im Auftrag von Colin King <colin.king@canonical.com>
Gesendet: Freitag, 15. Mai 2020 12:22
An: Kalle Valo; David S . Miller; linux-wireless@vger.kernel.org; netdev@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org; linux-kernel@vger.kernel.org
Betreff: [PATCH] rtlwifi: rtl8192ee: remove redundant for-loop

From: Colin Ian King <colin.king@canonical.com>

The for-loop seems to be redundant, the assignments for indexes
0..2 are being over-written by the last index 3 in the loop. Remove
the loop and use index 3 instead.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 .../net/wireless/realtek/rtlwifi/rtl8192ee/phy.c   | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/phy.c b/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/phy.c
index 6dba576aa81e..bb291b951f4d 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/phy.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8192ee/phy.c
@@ -2866,14 +2866,12 @@ void rtl92ee_phy_iq_calibrate(struct ieee80211_hw *hw, bool b_recovery)
                }
        }

-       for (i = 0; i < 4; i++) {
-               reg_e94 = result[i][0];
-               reg_e9c = result[i][1];
-               reg_ea4 = result[i][2];
-               reg_eb4 = result[i][4];
-               reg_ebc = result[i][5];
-               reg_ec4 = result[i][6];
-       }
+       reg_e94 = result[3][0];
+       reg_e9c = result[3][1];
+       reg_ea4 = result[3][2];
+       reg_eb4 = result[3][4];
+       reg_ebc = result[3][5];
+       reg_ec4 = result[3][6];

        if (final_candidate != 0xff) {
                reg_e94 = result[final_candidate][0];
--
2.25.1

Re: [PATCH] rtlwifi: rtl8192ee: remove redundant for-loop

[Kalle Valo]

Colin King <colin.king@canonical.com> wrote:

> From: Colin Ian King <colin.king@canonical.com>
> 
> The for-loop seems to be redundant, the assignments for indexes
> 0..2 are being over-written by the last index 3 in the loop. Remove
> the loop and use index 3 instead.
> 
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>

Patch applied to wireless-drivers-next.git, thanks.

b0a4bb7693be rtlwifi: rtl8192ee: remove redundant for-loop

-- 
https://patchwork.kernel.org/patch/11551059/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches