ALSA: Remove memory reservation code from memalloc helper

Nowadays we have CMA for obtaining the contiguous memory pages
efficiently.  Let's kill the old kludge for reserving the memory pages
for large buffers.  It was rarely useful (only for preserving pages
among module reloading or a little help by an early boot scripting),
used only by a couple of drivers, and yet it gives too much ugliness
than its benefit.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 13 insertions, 15 deletions

diff --git a/sound/pci/es1968.c b/sound/pci/es1968.c
index b0e3d92c4656..772cc36f951d 100644
--- a/sound/pci/es1968.c
+++ b/sound/pci/es1968.c
@@ -1422,7 +1422,7 @@ static void snd_es1968_free_dmabuf(struct es1968 *chip)
 
         if (! chip->dma.area)
                 return;
-        snd_dma_reserve_buf(&chip->dma, snd_dma_pci_buf_id(chip->pci));
+        snd_dma_free_pages(&chip->dma);
         while ((p = chip->buf_list.next) != &chip->buf_list) {
                 struct esm_memory *chunk = list_entry(p, struct esm_memory, list);
                 list_del(p);
@@ -1438,20 +1438,18 @@ snd_es1968_init_dmabuf(struct es1968 *chip)
 
         chip->dma.dev.type = SNDRV_DMA_TYPE_DEV;
         chip->dma.dev.dev = snd_dma_pci_data(chip->pci);
-        if (! snd_dma_get_reserved_buf(&chip->dma, snd_dma_pci_buf_id(chip->pci))) {
-                err = snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV,
-                                                   snd_dma_pci_data(chip->pci),
-                                                   chip->total_bufsize, &chip->dma);
-                if (err < 0 || ! chip->dma.area) {
-                        snd_printk(KERN_ERR "es1968: can't allocate dma pages for size %d\n",
-                                   chip->total_bufsize);
-                        return -ENOMEM;
-                }
-                if ((chip->dma.addr + chip->dma.bytes - 1) & ~((1 << 28) - 1)) {
-                        snd_dma_free_pages(&chip->dma);
-                        snd_printk(KERN_ERR "es1968: DMA buffer beyond 256MB.\n");
-                        return -ENOMEM;
-                }
+        err = snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV,
+                                           snd_dma_pci_data(chip->pci),
+                                           chip->total_bufsize, &chip->dma);
+        if (err < 0 || ! chip->dma.area) {
+                snd_printk(KERN_ERR "es1968: can't allocate dma pages for size %d\n",
+                           chip->total_bufsize);
+                return -ENOMEM;
+        }
+        if ((chip->dma.addr + chip->dma.bytes - 1) & ~((1 << 28) - 1)) {
+                snd_dma_free_pages(&chip->dma);
+                snd_printk(KERN_ERR "es1968: DMA buffer beyond 256MB.\n");
+                return -ENOMEM;
         }
 
         INIT_LIST_HEAD(&chip->buf_list);