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From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
To: krzysztof.kozlowski@canonical.com, s.nawrocki@samsung.com,
	lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz,
	tiwai@suse.com
Cc: alsa-devel@alsa-project.org,
	Jiasheng Jiang <jiasheng@iscas.ac.cn>,
	linux-kernel@vger.kernel.org
Subject: [PATCH] ASoC: samsung: idma: Check of ioremap return value
Date: Tue, 28 Dec 2021 11:40:26 +0800	[thread overview]
Message-ID: <20211228034026.1659385-1-jiasheng@iscas.ac.cn> (raw)

Because of the potential failure of the ioremap(), the buf->area could
be NULL.
Therefore, we need to check it and return -ENOMEM in order to transfer
the error.

Fixes: f09aecd50f39 ("ASoC: SAMSUNG: Add I2S0 internal dma driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
 sound/soc/samsung/idma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/samsung/idma.c b/sound/soc/samsung/idma.c
index 66bcc2f97544..c3f1b054e238 100644
--- a/sound/soc/samsung/idma.c
+++ b/sound/soc/samsung/idma.c
@@ -360,6 +360,8 @@ static int preallocate_idma_buffer(struct snd_pcm *pcm, int stream)
 	buf->addr = idma.lp_tx_addr;
 	buf->bytes = idma_hardware.buffer_bytes_max;
 	buf->area = (unsigned char * __force)ioremap(buf->addr, buf->bytes);
+	if (!buf->area)
+		return -ENOMEM;
 
 	return 0;
 }
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
To: krzysztof.kozlowski@canonical.com, s.nawrocki@samsung.com,
	lgirdwood@gmail.com, broonie@kernel.org, perex@perex.cz,
	tiwai@suse.com
Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
	Jiasheng Jiang <jiasheng@iscas.ac.cn>
Subject: [PATCH] ASoC: samsung: idma: Check of ioremap return value
Date: Tue, 28 Dec 2021 11:40:26 +0800	[thread overview]
Message-ID: <20211228034026.1659385-1-jiasheng@iscas.ac.cn> (raw)

Because of the potential failure of the ioremap(), the buf->area could
be NULL.
Therefore, we need to check it and return -ENOMEM in order to transfer
the error.

Fixes: f09aecd50f39 ("ASoC: SAMSUNG: Add I2S0 internal dma driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
 sound/soc/samsung/idma.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/samsung/idma.c b/sound/soc/samsung/idma.c
index 66bcc2f97544..c3f1b054e238 100644
--- a/sound/soc/samsung/idma.c
+++ b/sound/soc/samsung/idma.c
@@ -360,6 +360,8 @@ static int preallocate_idma_buffer(struct snd_pcm *pcm, int stream)
 	buf->addr = idma.lp_tx_addr;
 	buf->bytes = idma_hardware.buffer_bytes_max;
 	buf->area = (unsigned char * __force)ioremap(buf->addr, buf->bytes);
+	if (!buf->area)
+		return -ENOMEM;
 
 	return 0;
 }
-- 
2.25.1


             reply	other threads:[~2021-12-28  3:41 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-28  3:40 Jiasheng Jiang [this message]
2021-12-28  3:40 ` [PATCH] ASoC: samsung: idma: Check of ioremap return value Jiasheng Jiang
2021-12-28 13:12 ` Krzysztof Kozlowski
2021-12-29 13:29 ` Mark Brown
2021-12-29 13:29   ` Mark Brown

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