linux-kernel - [PATCH v2] staging: rtl8723bs: Use min/max macros for variable comparison

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Date:   Thu, 3 Nov 2022 15:03:29 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     outreachy@...ts.linux.dev,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: [PATCH v2] staging: rtl8723bs: Use min/max macros for variable
 comparison

Simplify code by using min and max helper macros in place of lengthy
if/else block oriented logical evaluation and value assignment. This
issue is identified by coccicheck using the minmax.cocci file.

Signed-off-by: Deepak R Varma <drv@...lo.com>
---

Changes in v2:
   1. Remove unnecessary parenthesis around the min/max macro arguments as
      suggested by julia.lawall@...ia.fr

Please note:
   1. Using min for max_AMPDU_len computation warning was NOT auto generated by
      the coccicheck command. This was caught while surround code review and
      was manually changed.
   2. Checkpatch script continues to complaint about min_MPDU_spacing
      computation line being more than 100 character in length. I did not find a
      better formatting that will address this checkpatch warning. Any
      suggestions are most welcome.
   3. Proposed changes are compile tested only on my x86 based VM.


 drivers/staging/rtl8723bs/core/rtw_wlan_util.c | 12 ++++--------
 drivers/staging/rtl8723bs/hal/odm_DIG.c        |  5 +----
 2 files changed, 5 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/rtl8723bs/core/rtw_wlan_util.c b/drivers/staging/rtl8723bs/core/rtw_wlan_util.c
index 18ba846c0b7b..ba39c8b1a9ae 100644
--- a/drivers/staging/rtl8723bs/core/rtw_wlan_util.c
+++ b/drivers/staging/rtl8723bs/core/rtw_wlan_util.c
@@ -986,15 +986,11 @@ void HT_caps_handler(struct adapter *padapter, struct ndis_80211_var_ie *pIE)
 			pmlmeinfo->HT_caps.u.HT_cap[i] &= (pIE->data[i]);
 		} else {
 			/* modify from  fw by Thomas 2010/11/17 */
-			if ((pmlmeinfo->HT_caps.u.HT_cap_element.AMPDU_para & 0x3) > (pIE->data[i] & 0x3))
-				max_AMPDU_len = (pIE->data[i] & 0x3);
-			else
-				max_AMPDU_len = (pmlmeinfo->HT_caps.u.HT_cap_element.AMPDU_para & 0x3);
+			max_AMPDU_len = min(pmlmeinfo->HT_caps.u.HT_cap_element.AMPDU_para & 0x3,
+					    pIE->data[i] & 0x3);

-			if ((pmlmeinfo->HT_caps.u.HT_cap_element.AMPDU_para & 0x1c) > (pIE->data[i] & 0x1c))
-				min_MPDU_spacing = (pmlmeinfo->HT_caps.u.HT_cap_element.AMPDU_para & 0x1c);
-			else
-				min_MPDU_spacing = (pIE->data[i] & 0x1c);
+			min_MPDU_spacing = max(pmlmeinfo->HT_caps.u.HT_cap_element.AMPDU_para & 0x1c,
+					       pIE->data[i] & 0x1c);

 			pmlmeinfo->HT_caps.u.HT_cap_element.AMPDU_para = max_AMPDU_len | min_MPDU_spacing;
 		}
diff --git a/drivers/staging/rtl8723bs/hal/odm_DIG.c b/drivers/staging/rtl8723bs/hal/odm_DIG.c
index 07edf74ccfe5..97a51546463a 100644
--- a/drivers/staging/rtl8723bs/hal/odm_DIG.c
+++ b/drivers/staging/rtl8723bs/hal/odm_DIG.c
@@ -598,10 +598,7 @@ void odm_DIGbyRSSI_LPS(void *pDM_VOID)
 	/* Lower bound checking */

 	/* RSSI Lower bound check */
-	if ((pDM_Odm->RSSI_Min-10) > DM_DIG_MIN_NIC)
-		RSSI_Lower = pDM_Odm->RSSI_Min-10;
-	else
-		RSSI_Lower = DM_DIG_MIN_NIC;
+	RSSI_Lower = max(pDM_Odm->RSSI_Min - 10, DM_DIG_MIN_NIC);

 	/* Upper and Lower Bound checking */
 	if (CurrentIGI > DM_DIG_MAX_NIC)
--
2.34.1