[PATCH] ASoC: brcm: fix dma_addr_t cast to pointer

[Arnd Bergmann <arnd@arndb.de>]

A dma_addr_t is not a pointer and a cast causes a warning when
the sizes are different:

sound/soc/bcm/bcm63xx-pcm-whistler.c: In function 'bcm63xx_pcm_pointer':
sound/soc/bcm/bcm63xx-pcm-whistler.c:184:6: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
  184 |  if ((void *)prtd->dma_addr_next == NULL)

Change the comparison to NULL to an equivalent if() check that
does not warn.

Fixes: 88eb404ccc3e ("ASoC: brcm: Add DSL/PON SoC audio driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 sound/soc/bcm/bcm63xx-pcm-whistler.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/bcm/bcm63xx-pcm-whistler.c b/sound/soc/bcm/bcm63xx-pcm-whistler.c
index e46c390683e7..b7a1efc7406e 100644
--- a/sound/soc/bcm/bcm63xx-pcm-whistler.c
+++ b/sound/soc/bcm/bcm63xx-pcm-whistler.c
@@ -181,7 +181,7 @@ bcm63xx_pcm_pointer(struct snd_soc_component *component,
 	snd_pcm_uframes_t x;
 	struct bcm63xx_runtime_data *prtd = substream->runtime->private_data;
 
-	if ((void *)prtd->dma_addr_next == NULL)
+	if (!prtd->dma_addr_next)
 		prtd->dma_addr_next = substream->runtime->dma_addr;
 
 	x = bytes_to_frames(substream->runtime,
-- 
2.26.0