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ASoC: samsung: idma: Check of ioremap return value

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[ Upstream commit 3ecb46755e ]

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: f09aecd50f ("ASoC: SAMSUNG: Add I2S0 internal dma driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20211228034026.1659385-1-jiasheng@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiasheng Jiang 2021-12-28 11:40:26 +08:00 committed by Greg Kroah-Hartman
parent d491a2c2cf
commit 696a50abbc
1 changed files with 2 additions and 0 deletions
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2
sound/soc/samsung/idma.c
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@ -360,6 +360,8 @@ static int preallocate_idma_buffer(struct snd_pcm *pcm, int stream)
buf->addr = idma.lp_tx_addr; buf->addr = idma.lp_tx_addr;
buf->bytes = idma_hardware.buffer_bytes_max; buf->bytes = idma_hardware.buffer_bytes_max;
buf->area = (unsigned char * __force)ioremap(buf->addr, buf->bytes); buf->area = (unsigned char * __force)ioremap(buf->addr, buf->bytes);
if (!buf->area)
return -ENOMEM;
return 0; return 0;
} }