Commit 74c64efa authored Dec 18, 2020 by Robin Gong Committed by Takashi Iwai Dec 17, 2020

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: Robin 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: Takashi Iwai <tiwai@suse.de>

parent 150927c3

sound/core/memalloc.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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);
		}

		/**

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