ASoC: AMD: Add NULL pointer check

Fix crash in those platforms whose machine driver does not expose
platform_info. For those platforms we rely on default value and
select I2SSP channel.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
index 77203841c535017bd0fea9c0cd20c5722e5d0ead..1458b504849820187317d507834941f2da7f9acc 100644 (file)
--- a/sound/soc/amd/acp-pcm-dma.c
+++ b/sound/soc/amd/acp-pcm-dma.c
@@ -773,7 +773,8 @@ static int acp_dma_hw_params(struct snd_pcm_substream *substream,
        if (WARN_ON(!rtd))
                return -EINVAL;
 
-       rtd->i2s_instance = pinfo->i2s_instance;
+       if (pinfo)
+               rtd->i2s_instance = pinfo->i2s_instance;
        if (adata->asic_type == CHIP_STONEY) {
                val = acp_reg_read(adata->acp_mmio,
                                   mmACP_I2S_16BIT_RESOLUTION_EN);