Merge branch 'for-linus' of git://git.alsa-project.org/alsa-kernel

* 'for-linus' of git://git.alsa-project.org/alsa-kernel: (258 commits)
  ALSA: hda: VREF powerdown for headphones
  ALSA: hda: STAC_HP_M4
  ALSA: ASoC: Check for machine type in GTA01 machine driver
  ALSA: mtpav - Fix race in probe
  ALSA: usb-audio: dynamic detection of MIDI interfaces in uaxx-quirk
  ALSA: Add a note on dependency of RTC stuff
  ALSA: ASoC: add new param mux to dapm_mux_update_power
  ALSA: Increase components array size
  ALSA: ASoC: Correct inverted Mic PGA Switch control in wm8510 driver
  ALSA: hda: comment typo fix
  ALSA: hda: comment typo fix
  ALSA: hda - Fix PCI SSID for ASROCK K18N78FullHD-hSLI
  ALSA: snd-usb-audio: support for Edirol UA-4FX device
  ALSA: usb - Fix possible Oops at USB-MIDI disconnection
  ALSA: hda - Fix another ALC889A (rev 0x100101)
  ALSA: hda: add more board-specific information for Realtek ALC662 rev1
  ALSA: Correct Vladimir Barinov's e-mail address
  ALSA: cs46xx: Add PCI IDs for TerraTec and Hercules cards
  ALSA: hda: SPDIF stream muting support
  ALSA: hda: appletv support
  ...

1 files changed, 33 insertions, 7 deletions

diff --git a/sound/core/pcm_memory.c b/sound/core/pcm_memory.c
index ff07b4a9992..a6d42808828 100644
--- a/sound/core/pcm_memory.c
+++ b/sound/core/pcm_memory.c
@@ -50,8 +50,6 @@ static int preallocate_pcm_pages(struct snd_pcm_substream *substream, size_t siz
 	struct snd_dma_buffer *dmab = &substream->dma_buffer;
 	int err;
 
-	snd_assert(size > 0, return -EINVAL);
-
 	/* already reserved? */
 	if (snd_dma_get_reserved_buf(dmab, substream->dma_buf_id) > 0) {
 		if (dmab->bytes >= size)
@@ -326,6 +324,32 @@ struct page *snd_pcm_sgbuf_ops_page(struct snd_pcm_substream *substream, unsigne
 
 EXPORT_SYMBOL(snd_pcm_sgbuf_ops_page);
 
+/*
+ * compute the max chunk size with continuous pages on sg-buffer
+ */
+unsigned int snd_pcm_sgbuf_get_chunk_size(struct snd_pcm_substream *substream,
+					  unsigned int ofs, unsigned int size)
+{
+	struct snd_sg_buf *sg = snd_pcm_substream_sgbuf(substream);
+	unsigned int start, end, pg;
+
+	start = ofs >> PAGE_SHIFT;
+	end = (ofs + size - 1) >> PAGE_SHIFT;
+	/* check page continuity */
+	pg = sg->table[start].addr >> PAGE_SHIFT;
+	for (;;) {
+		start++;
+		if (start > end)
+			break;
+		pg++;
+		if ((sg->table[start].addr >> PAGE_SHIFT) != pg)
+			return (start << PAGE_SHIFT) - ofs;
+	}
+	/* ok, all on continuous pages */
+	return size;
+}
+EXPORT_SYMBOL(snd_pcm_sgbuf_get_chunk_size);
+
 /**
  * snd_pcm_lib_malloc_pages - allocate the DMA buffer
  * @substream: the substream to allocate the DMA buffer to
@@ -342,10 +366,12 @@ int snd_pcm_lib_malloc_pages(struct snd_pcm_substream *substream, size_t size)
 	struct snd_pcm_runtime *runtime;
 	struct snd_dma_buffer *dmab = NULL;
 
-	snd_assert(substream->dma_buffer.dev.type != SNDRV_DMA_TYPE_UNKNOWN, return -EINVAL);
-	snd_assert(substream != NULL, return -EINVAL);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -EINVAL;
+	if (snd_BUG_ON(substream->dma_buffer.dev.type ==
+		       SNDRV_DMA_TYPE_UNKNOWN))
+		return -EINVAL;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -EINVAL);
 
 	if (runtime->dma_buffer_p) {
 		/* perphaps, we might free the large DMA memory region
@@ -391,9 +417,9 @@ int snd_pcm_lib_free_pages(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime;
 
-	snd_assert(substream != NULL, return -EINVAL);
+	if (PCM_RUNTIME_CHECK(substream))
+		return -EINVAL;
 	runtime = substream->runtime;
-	snd_assert(runtime != NULL, return -EINVAL);
 	if (runtime->dma_area == NULL)
 		return 0;
 	if (runtime->dma_buffer_p != &substream->dma_buffer) {