This is a note to let you know that I've just added the patch titled
ALSA: pcm: use the same dma mmap codepath both for arm and arm64
to the 3.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-pcm-use-the-same-dma-mmap-codepath-both-for-arm-and-arm64.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a011e213f3700233ed2a676f1ef0a74a052d7162 Mon Sep 17 00:00:00 2001
From: Anatol Pomozov <anatol.pomozov@xxxxxxxxx>
Date: Fri, 17 Oct 2014 12:43:34 -0700
Subject: ALSA: pcm: use the same dma mmap codepath both for arm and arm64
From: Anatol Pomozov <anatol.pomozov@xxxxxxxxx>
commit a011e213f3700233ed2a676f1ef0a74a052d7162 upstream.
This avoids following kernel crash when try to playback on arm64
[ 107.497203] [<ffffffc00046b310>] snd_pcm_mmap_data_fault+0x90/0xd4
[ 107.503405] [<ffffffc0001541ac>] __do_fault+0xb0/0x498
[ 107.508565] [<ffffffc0001576a0>] handle_mm_fault+0x224/0x7b0
[ 107.514246] [<ffffffc000092640>] do_page_fault+0x11c/0x310
[ 107.519738] [<ffffffc000081100>] do_mem_abort+0x38/0x98
Tested: backported to 3.14 and tried to playback on arm64 machine
Signed-off-by: Anatol Pomozov <anatol.pomozov@xxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/core/pcm_native.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3193,7 +3193,7 @@ static const struct vm_operations_struct
#ifndef ARCH_HAS_DMA_MMAP_COHERENT
/* This should be defined / handled globally! */
-#ifdef CONFIG_ARM
+#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
#define ARCH_HAS_DMA_MMAP_COHERENT
#endif
#endif
Patches currently in stable-queue which might be from anatol.pomozov@xxxxxxxxx are
queue-3.17/alsa-pcm-use-the-same-dma-mmap-codepath-both-for-arm-and-arm64.patch
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