linux-kernel - [PATCH 3/3] staging: r8188eu: simplify odm_evm_db_to

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Date:   Fri, 30 Jul 2021 11:09:48 +0200
From:   Michael Straube <straube.linux@...il.com>
To:     gregkh@...uxfoundation.org
Cc:     Larry.Finger@...inger.net, phil@...lpotter.co.uk,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Michael Straube <straube.linux@...il.com>
Subject: [PATCH 3/3] staging: r8188eu: simplify odm_evm_db_to_percentage()

Use clamp() to simplify odm_evm_db_to_percentage().

Signed-off-by: Michael Straube <straube.linux@...il.com>
---
When this driver will be moved to drivers/net/wireless/realtek/rtlwifi
(if that's the plan?) the odm_evm_db_to_percentage() function could be
replaced by the generic version rtl_evm_db_to_percentage() from
drivers/net/wireless/realtek/rtlwifi/stats.c

 drivers/staging/r8188eu/hal/odm_HWConfig.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/r8188eu/hal/odm_HWConfig.c b/drivers/staging/r8188eu/hal/odm_HWConfig.c
index 51ae02805149..19222c0eddf7 100644
--- a/drivers/staging/r8188eu/hal/odm_HWConfig.c
+++ b/drivers/staging/r8188eu/hal/odm_HWConfig.c
@@ -80,20 +80,11 @@ static u8 odm_SQ_process_patch_RT_CID_819x_Lenovo(struct odm_dm_struct *dm_odm,
 static u8 odm_evm_db_to_percentage(s8 value)
 {
 	/*  -33dB~0dB to 0%~99% */
-	s8 ret_val;
-
-	ret_val = value;
-
-	if (ret_val >= 0)
-		ret_val = 0;
-	if (ret_val <= -33)
-		ret_val = -33;
-
-	ret_val = 0 - ret_val;
-	ret_val *= 3;
+	s8 ret_val = clamp(-value, 0, 33) * 3;
 
 	if (ret_val == 99)
 		ret_val = 100;
+
 	return ret_val;
 }
 
-- 
2.32.0