From: Anatol Pomozov <anatol.pomozov@gmail.com>
Date: Fri, 17 Oct 2014 19:43:34 +0000 (-0700)
Subject: ALSA: pcm: use the same dma mmap codepath both for arm and arm64
X-Git-Tag: v4.9.8~5095^2~77
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a011e213f3700233ed2a676f1ef0a74a052d7162;p=platform%2Fkernel%2Flinux-rpi3.git

ALSA: pcm: use the same dma mmap codepath both for arm and arm64

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@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index bfe1cf6..815396d 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3311,7 +3311,7 @@ static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
 
 #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