linux-kernel - [PATCH v2 1/2] ASoC: starfive: Fix an error check in jh7110_tdm_clk_reset

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Message-ID: <20230608135750.11041-2-walker.chen@starfivetech.com>
Date:   Thu, 8 Jun 2023 21:57:49 +0800
From:   Walker Chen <walker.chen@...rfivetech.com>
To:     Mark Brown <broonie@...nel.org>,
        Claudiu Beznea <Claudiu.Beznea@...rochip.com>,
        Dan Carpenter <dan.carpenter@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Takashi Iwai <tiwai@...e.com>,
        "Jaroslav Kysela" <perex@...ex.cz>,
        Walker Chen <walker.chen@...rfivetech.com>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 1/2] ASoC: starfive: Fix an error check in jh7110_tdm_clk_reset_get()

Fix the check for devm_reset_control_array_get_exclusive() return value.
The devm_reset_control_array_get_exclusive() function may return NULL if
it's an optional request. If optional is intended then NULL should not
be treated as an error case, but as a special kind of success case. So
here the IS_ERR() is used to check better.

Signed-off-by: Walker Chen <walker.chen@...rfivetech.com>
---
Fix the following issue:
https://lore.kernel.org/all/ZH7t6Nc+NTcGpq%2F3@moroto/
---
 sound/soc/starfive/jh7110_tdm.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/sound/soc/starfive/jh7110_tdm.c b/sound/soc/starfive/jh7110_tdm.c
index 973b910d2d3e..a9a3d52bdd2a 100644
--- a/sound/soc/starfive/jh7110_tdm.c
+++ b/sound/soc/starfive/jh7110_tdm.c
@@ -580,10 +580,9 @@ static int jh7110_tdm_clk_reset_get(struct platform_device *pdev,
 	}
 
 	tdm->resets = devm_reset_control_array_get_exclusive(&pdev->dev);
-	if (IS_ERR_OR_NULL(tdm->resets)) {
-		ret = PTR_ERR(tdm->resets);
-		dev_err(&pdev->dev, "Failed to get tdm resets");
-		return ret;
+	if (IS_ERR(tdm->resets)) {
+		dev_err(&pdev->dev, "Failed to get tdm resets\n");
+		return PTR_ERR(tdm->resets);
 	}
 
 	return 0;
-- 
2.17.1