[ALSA] Add write support to snd-page-alloc proc file
Documentation,Memalloc module,RME HDSP driver,RME9652 driver
Add the write support to snd-page-alloc proc file for buffer pre-allocation.
Removed the pre-allocation codes via module options.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/rme9652/rme9652.c b/sound/pci/rme9652/rme9652.c
index 5861f23..f303740 100644
--- a/sound/pci/rme9652/rme9652.c
+++ b/sound/pci/rme9652/rme9652.c
@@ -303,18 +303,22 @@
{
dmab->dev.type = SNDRV_DMA_TYPE_DEV;
dmab->dev.dev = snd_dma_pci_data(pci);
- if (! snd_dma_get_reserved_buf(dmab, snd_dma_pci_buf_id(pci))) {
- if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
- size, dmab) < 0)
- return -ENOMEM;
+ if (snd_dma_get_reserved_buf(dmab, snd_dma_pci_buf_id(pci))) {
+ if (dmab->bytes >= size)
+ return 0;
}
+ if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
+ size, dmab) < 0)
+ return -ENOMEM;
return 0;
}
static void snd_hammerfall_free_buffer(struct snd_dma_buffer *dmab, struct pci_dev *pci)
{
- if (dmab->area)
+ if (dmab->area) {
+ dmab->dev.dev = NULL; /* make it anonymous */
snd_dma_reserve_buf(dmab, snd_dma_pci_buf_id(pci));
+ }
}