It seems that calling invalidate_kernel_vmap_range() is more correct to be called before dma_sync_*(), judging from the other thread: https://lore.kernel.org/all/20220111085958.GA22795@lst.de/ Although this won't matter much in practice, let's fix the call order for consistency.
Fixes: a25684a95646 ("ALSA: memalloc: Support for non-contiguous page allocation") Reported-by: Ezequiel Garcia ezequiel@vanguardiasur.com.ar Cc: stable@vger.kernel.org Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/core/memalloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c index f98f694e3ce4..6fd763d4d15b 100644 --- a/sound/core/memalloc.c +++ b/sound/core/memalloc.c @@ -541,9 +541,9 @@ static void snd_dma_noncontig_sync(struct snd_dma_buffer *dmab, if (mode == SNDRV_DMA_SYNC_CPU) { if (dmab->dev.dir == DMA_TO_DEVICE) return; + invalidate_kernel_vmap_range(dmab->area, dmab->bytes); dma_sync_sgtable_for_cpu(dmab->dev.dev, dmab->private_data, dmab->dev.dir); - invalidate_kernel_vmap_range(dmab->area, dmab->bytes); } else { if (dmab->dev.dir == DMA_FROM_DEVICE) return;