Although we've covered all calls with NULL dma buffer pointer, so far, there may be still some else in the wild. For catching such a case more easily, add a WARN_ON_ONCE() in snd_dma_get_ops().
Fixes: 37af81c5998f ("ALSA: core: Abstract memory alloc helpers") Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/core/memalloc.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c index ea778f868cf3..ea9698cea2e3 100644 --- a/sound/core/memalloc.c +++ b/sound/core/memalloc.c @@ -631,6 +631,8 @@ static const struct snd_malloc_ops *dma_ops[] = {
static const struct snd_malloc_ops *snd_dma_get_ops(struct snd_dma_buffer *dmab) { + if (WARN_ON_ONCE(!dmab)) + return NULL; if (WARN_ON_ONCE(dmab->dev.type <= SNDRV_DMA_TYPE_UNKNOWN || dmab->dev.type >= ARRAY_SIZE(dma_ops))) return NULL;