From patchwork series 496970

https://patchwork.ozlabs.org//project/linuxppc-dev/list/?series=496970

Author: Fox Snowpatch

sound/soc/fsl/fsl_dma.c

@@ -267,15 +267,10 @@ static irqreturn_t fsl_dma_isr(int irq, void *dev_id)
 /**
  * fsl_dma_new: initialize this PCM driver.
  *
- * This function is called when the codec driver calls snd_soc_new_pcms(),
- * once for each .dai_link in the machine driver's snd_soc_card
+ * This function is called by soc_new_pcm() via the pcm_construct
+ * callback, once for each DAI link in the machine driver's snd_soc_card
  * structure.
  *
- * snd_dma_alloc_pages() is just a front-end to dma_alloc_coherent(), which
- * (currently) always allocates the DMA buffer in lowmem, even if GFP_HIGHMEM
- * is specified. Therefore, any DMA buffers we allocate will always be in low
- * memory, but we support for 36-bit physical addresses anyway.
- *
  * Regardless of where the memory is actually allocated, since the device can
  * technically DMA to any 36-bit address, we do need to set the DMA mask to 36.
  */