Messages in this thread Patch in this message | | | From | Robin Gong <> | Subject | [PATCH v1 ] ALSA: core: memalloc: add page alignment for iram | Date | Fri, 18 Dec 2020 00:15:47 +0800 |
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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@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
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