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Commit 74c64efa authored by Robin Gong's avatar Robin Gong Committed by Takashi Iwai
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ALSA: core: memalloc: add page alignment for iram


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: default avatarRobin Gong <yibin.gong@nxp.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1608221747-3474-1-git-send-email-yibin.gong@nxp.com


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 150927c3
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...@@ -77,7 +77,8 @@ static void snd_malloc_dev_iram(struct snd_dma_buffer *dmab, size_t size) ...@@ -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 */ /* Assign the pool into private_data field */
dmab->private_data = pool; 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);
} }
/** /**
......
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