[PATCH v1 ] ALSA: core: memalloc: add page alignment for iram

[Robin Gong]

Since mmap for userspace is based on page alignment, add page alignment
for iram alloc from pool, otherwise, some good data located in the same
page of dmab->area maybe touched wrongly by userspace like pulseaudio.

Signed-off-by: Robin Gong <yibin.gong at nxp.com>
---
 sound/core/memalloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c
index 0aeeb62..0f33516 100644
--- a/sound/core/memalloc.c
+++ b/sound/core/memalloc.c
@@ -77,7 +77,8 @@ static void snd_malloc_dev_iram(struct snd_dma_buffer *dmab, size_t size)
 	/* Assign the pool into private_data field */
 	dmab->private_data = pool;
 
-	dmab->area = gen_pool_dma_alloc(pool, size, &dmab->addr);
+	dmab->area = gen_pool_dma_alloc_align(pool, size, &dmab->addr,
+					PAGE_SIZE);
 }
 
 /**
-- 
2.7.4