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From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
To: broonie@kernel.org
Cc: cezary.rojewski@intel.com, srinivas.kandagatla@linaro.org,
	bgoswami@codeaurora.org, lgirdwood@gmail.com, perex@perex.cz,
	tiwai@suse.com, alsa-devel@alsa-project.org,
	linux-kernel@vger.kernel.org,
	Jiasheng Jiang <jiasheng@iscas.ac.cn>
Subject: [PATCH v3] ASoC: codecs: Check for error pointer after calling devm_regmap_init_mmio
Date: Sat, 22 Jan 2022 01:10:31 +0800	[thread overview]
Message-ID: <20220121171031.2826198-1-jiasheng@iscas.ac.cn> (raw)

Since the potential failure of the devm_regmap_init_mmio(), it will
return error pointer and be assigned to the regmap.
Then the error pointer will be dereferenced.
For example rx->regmap will be used in rx_macro_mclk_enable().
Therefore, it should be better to check it.

Fixes: af3d54b99764 ("ASoC: codecs: lpass-rx-macro: add support for lpass rx macro")
Fixes: c39667ddcfc5 ("ASoC: codecs: lpass-tx-macro: add support for lpass tx macro")
Fixes: 809bcbcecebf ("ASoC: codecs: lpass-wsa-macro: Add support to WSA Macro")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
Changelog

v1 -> v2

* Change 1. Refine the commit message.

v2 -> v3

* Change 1. Make the patch against the latest code.
---
 sound/soc/codecs/lpass-rx-macro.c  | 2 ++
 sound/soc/codecs/lpass-tx-macro.c  | 2 ++
 sound/soc/codecs/lpass-wsa-macro.c | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/sound/soc/codecs/lpass-rx-macro.c b/sound/soc/codecs/lpass-rx-macro.c
index aec5127260fd..29d214f784d1 100644
--- a/sound/soc/codecs/lpass-rx-macro.c
+++ b/sound/soc/codecs/lpass-rx-macro.c
@@ -3542,6 +3542,8 @@ static int rx_macro_probe(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	rx->regmap = devm_regmap_init_mmio(dev, base, &rx_regmap_config);
+	if (IS_ERR(rx->regmap))
+		return PTR_ERR(rx->regmap);
 
 	dev_set_drvdata(dev, rx);
 
diff --git a/sound/soc/codecs/lpass-tx-macro.c b/sound/soc/codecs/lpass-tx-macro.c
index a4c0a155af56..9c96ab1bf84f 100644
--- a/sound/soc/codecs/lpass-tx-macro.c
+++ b/sound/soc/codecs/lpass-tx-macro.c
@@ -1821,6 +1821,8 @@ static int tx_macro_probe(struct platform_device *pdev)
 	}
 
 	tx->regmap = devm_regmap_init_mmio(dev, base, &tx_regmap_config);
+	if (IS_ERR(tx->regmap))
+		return PTR_ERR(tx->regmap);
 
 	dev_set_drvdata(dev, tx);
 
diff --git a/sound/soc/codecs/lpass-wsa-macro.c b/sound/soc/codecs/lpass-wsa-macro.c
index 75baf8eb7029..69d2915f40d8 100644
--- a/sound/soc/codecs/lpass-wsa-macro.c
+++ b/sound/soc/codecs/lpass-wsa-macro.c
@@ -2405,6 +2405,8 @@ static int wsa_macro_probe(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	wsa->regmap = devm_regmap_init_mmio(dev, base, &wsa_regmap_config);
+	if (IS_ERR(wsa->regmap))
+		return PTR_ERR(wsa->regmap);
 
 	dev_set_drvdata(dev, wsa);
 
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
To: broonie@kernel.org
Cc: cezary.rojewski@intel.com, bgoswami@codeaurora.org,
	alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
	Jiasheng Jiang <jiasheng@iscas.ac.cn>,
	tiwai@suse.com, lgirdwood@gmail.com,
	srinivas.kandagatla@linaro.org
Subject: [PATCH v3] ASoC: codecs: Check for error pointer after calling devm_regmap_init_mmio
Date: Sat, 22 Jan 2022 01:10:31 +0800	[thread overview]
Message-ID: <20220121171031.2826198-1-jiasheng@iscas.ac.cn> (raw)

Since the potential failure of the devm_regmap_init_mmio(), it will
return error pointer and be assigned to the regmap.
Then the error pointer will be dereferenced.
For example rx->regmap will be used in rx_macro_mclk_enable().
Therefore, it should be better to check it.

Fixes: af3d54b99764 ("ASoC: codecs: lpass-rx-macro: add support for lpass rx macro")
Fixes: c39667ddcfc5 ("ASoC: codecs: lpass-tx-macro: add support for lpass tx macro")
Fixes: 809bcbcecebf ("ASoC: codecs: lpass-wsa-macro: Add support to WSA Macro")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
Changelog

v1 -> v2

* Change 1. Refine the commit message.

v2 -> v3

* Change 1. Make the patch against the latest code.
---
 sound/soc/codecs/lpass-rx-macro.c  | 2 ++
 sound/soc/codecs/lpass-tx-macro.c  | 2 ++
 sound/soc/codecs/lpass-wsa-macro.c | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/sound/soc/codecs/lpass-rx-macro.c b/sound/soc/codecs/lpass-rx-macro.c
index aec5127260fd..29d214f784d1 100644
--- a/sound/soc/codecs/lpass-rx-macro.c
+++ b/sound/soc/codecs/lpass-rx-macro.c
@@ -3542,6 +3542,8 @@ static int rx_macro_probe(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	rx->regmap = devm_regmap_init_mmio(dev, base, &rx_regmap_config);
+	if (IS_ERR(rx->regmap))
+		return PTR_ERR(rx->regmap);
 
 	dev_set_drvdata(dev, rx);
 
diff --git a/sound/soc/codecs/lpass-tx-macro.c b/sound/soc/codecs/lpass-tx-macro.c
index a4c0a155af56..9c96ab1bf84f 100644
--- a/sound/soc/codecs/lpass-tx-macro.c
+++ b/sound/soc/codecs/lpass-tx-macro.c
@@ -1821,6 +1821,8 @@ static int tx_macro_probe(struct platform_device *pdev)
 	}
 
 	tx->regmap = devm_regmap_init_mmio(dev, base, &tx_regmap_config);
+	if (IS_ERR(tx->regmap))
+		return PTR_ERR(tx->regmap);
 
 	dev_set_drvdata(dev, tx);
 
diff --git a/sound/soc/codecs/lpass-wsa-macro.c b/sound/soc/codecs/lpass-wsa-macro.c
index 75baf8eb7029..69d2915f40d8 100644
--- a/sound/soc/codecs/lpass-wsa-macro.c
+++ b/sound/soc/codecs/lpass-wsa-macro.c
@@ -2405,6 +2405,8 @@ static int wsa_macro_probe(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	wsa->regmap = devm_regmap_init_mmio(dev, base, &wsa_regmap_config);
+	if (IS_ERR(wsa->regmap))
+		return PTR_ERR(wsa->regmap);
 
 	dev_set_drvdata(dev, wsa);
 
-- 
2.25.1


             reply	other threads:[~2022-01-21 17:11 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-21 17:10 Jiasheng Jiang [this message]
2022-01-21 17:10 ` [PATCH v3] ASoC: codecs: Check for error pointer after calling devm_regmap_init_mmio Jiasheng Jiang
2022-01-25 10:20 ` Mark Brown
2022-01-25 10:20   ` Mark Brown

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