[PATCH -next] staging/goldfish/goldfish_audio: fix a sparse warning

[Robin Schroer]

Fix a pointer check to use NULL instead of 0

Warning:
drivers/staging/goldfish/goldfish_audio.c:300:34: warning: Using plain
integer as NULL pointer

Signed-off-by: Robin Schroer <sulamiification@xxxxxxxxx>
---
 drivers/staging/goldfish/goldfish_audio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/goldfish/goldfish_audio.c b/drivers/staging/goldfish/goldfish_audio.c
index 9df4ad8..c89d0b8 100644
--- a/drivers/staging/goldfish/goldfish_audio.c
+++ b/drivers/staging/goldfish/goldfish_audio.c
@@ -297,7 +297,7 @@ static int goldfish_audio_probe(struct platform_device *pdev)
 	}
 	data->buffer_virt = dmam_alloc_coherent(&pdev->dev,
 				COMBINED_BUFFER_SIZE, &buf_addr, GFP_KERNEL);
-	if (data->buffer_virt == 0) {
+	if (data->buffer_virt == NULL) {
 		dev_err(&pdev->dev, "allocate buffer failed\n");
 		return -ENOMEM;
 	}
-- 
2.0.2

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