linux-kernel - [PATCH 5/9] ASoC: fsl: fsl_ssi: remove unnecessary tests

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Date:   Fri, 19 Feb 2021 17:29:33 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     alsa-devel@...a-project.org
Cc:     tiwai@...e.de, broonie@...nel.org, linux-kernel@...r.kernel.org,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Timur Tabi <timur@...nel.org>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Shengjiu Wang <shengjiu.wang@...il.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        linuxppc-dev@...ts.ozlabs.org (open list:FREESCALE SOC SOUND DRIVERS)
Subject: [PATCH 5/9] ASoC: fsl: fsl_ssi: remove unnecessary tests

cppcheck warnings:

sound/soc/fsl/fsl_ssi.c:767:34: style: Condition 'div2' is always
false [knownConditionTrueFalse]
 stccr = SSI_SxCCR_PM(pm + 1) | (div2 ? SSI_SxCCR_DIV2 : 0) |
                                 ^
sound/soc/fsl/fsl_ssi.c:722:9: note: Assignment 'div2=0', assigned value is 0
 div2 = 0;
        ^
sound/soc/fsl/fsl_ssi.c:767:34: note: Condition 'div2' is always false
 stccr = SSI_SxCCR_PM(pm + 1) | (div2 ? SSI_SxCCR_DIV2 : 0) |
                                 ^
sound/soc/fsl/fsl_ssi.c:768:4: style: Condition 'psr' is always false
[knownConditionTrueFalse]
  (psr ? SSI_SxCCR_PSR : 0);
   ^
sound/soc/fsl/fsl_ssi.c:721:8: note: Assignment 'psr=0', assigned
value is 0
 psr = 0;
       ^
sound/soc/fsl/fsl_ssi.c:768:4: note: Condition 'psr' is always false
  (psr ? SSI_SxCCR_PSR : 0);
   ^

Upon further analysis, the variables 'div2' and 'psr' are set to zero
and never modified. All the tests can be removed.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
---
 sound/soc/fsl/fsl_ssi.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 57811743c294..c57d0428c0a3 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -747,7 +747,7 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream,
 		sub *= 100000;
 		do_div(sub, freq);
 
-		if (sub < savesub && !(i == 0 && psr == 0 && div2 == 0)) {
+		if (sub < savesub && !(i == 0)) {
 			baudrate = tmprate;
 			savesub = sub;
 			pm = i;
@@ -764,8 +764,7 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream,
 		return -EINVAL;
 	}
 
-	stccr = SSI_SxCCR_PM(pm + 1) | (div2 ? SSI_SxCCR_DIV2 : 0) |
-		(psr ? SSI_SxCCR_PSR : 0);
+	stccr = SSI_SxCCR_PM(pm + 1);
 	mask = SSI_SxCCR_PM_MASK | SSI_SxCCR_DIV2 | SSI_SxCCR_PSR;
 
 	/* STCCR is used for RX in synchronous mode */
-- 
2.25.1