From: Jiasheng Jiang Date: Tue, 28 Dec 2021 03:40:26 +0000 (+0800) Subject: ASoC: samsung: idma: Check of ioremap return value X-Git-Tag: v5.17-rc1~86^2~15^2~6 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3ecb46755eb85456b459a1a9f952c52986bce8ec;p=thirdparty%2Fkernel%2Flinux.git ASoC: samsung: idma: Check of ioremap return value 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 Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20211228034026.1659385-1-jiasheng@iscas.ac.cn Signed-off-by: Mark Brown --- diff --git a/sound/soc/samsung/idma.c b/sound/soc/samsung/idma.c index 66bcc2f97544b..c3f1b054e2389 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; }