From: Jiasheng Jiang jiasheng@iscas.ac.cn
[ Upstream commit 3ecb46755eb85456b459a1a9f952c52986bce8ec ]
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 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 --- 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 3e408158625db..72014dea75422 100644 --- a/sound/soc/samsung/idma.c +++ b/sound/soc/samsung/idma.c @@ -369,6 +369,8 @@ 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; }