From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:36584 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753235AbeDAI5U (ORCPT ); Sun, 1 Apr 2018 04:57:20 -0400 Subject: Patch "ALSA: pcm: Use dma_bytes as size parameter in dma_mmap_coherent()" has been added to the 4.9-stable tree To: sr@denx.de, gregkh@linuxfoundation.org, stable@vger.kernel.org, tiwai@suse.de Cc: , From: Date: Sun, 01 Apr 2018 10:56:57 +0200 Message-ID: <1522573017163210@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled ALSA: pcm: Use dma_bytes as size parameter in dma_mmap_coherent() to the 4.9-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-dma_bytes-as-size-parameter-in-dma_mmap_coherent.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 9066ae7ff5d89c0b5daa271e2d573540097a94fa Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Mon, 26 Mar 2018 16:10:21 +0200 Subject: ALSA: pcm: Use dma_bytes as size parameter in dma_mmap_coherent() From: Stefan Roese commit 9066ae7ff5d89c0b5daa271e2d573540097a94fa upstream. When trying to use the driver (e.g. aplay *.wav), the 4MiB DMA buffer will get mmapp'ed in 16KiB chunks. But this fails with the 2nd 16KiB area, as the page offset is outside of the VMA range (size), which is currently used as size parameter in snd_pcm_lib_default_mmap(). By using the DMA buffer size (dma_bytes) instead, the complete DMA buffer can be mmapp'ed and the issue is fixed. This issue was detected on an ARM platform (TI AM57xx) using the RME HDSP MADI PCIe soundcard. Fixes: 657b1989dacf ("ALSA: pcm - Use dma_mmap_coherent() if available") Signed-off-by: Stefan Roese Cc: Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- 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 @@ -3410,7 +3410,7 @@ int snd_pcm_lib_default_mmap(struct snd_ area, substream->runtime->dma_area, substream->runtime->dma_addr, - area->vm_end - area->vm_start); + substream->runtime->dma_bytes); #endif /* CONFIG_X86 */ /* mmap with fault handler */ area->vm_ops = &snd_pcm_vm_ops_data_fault; Patches currently in stable-queue which might be from sr@denx.de are queue-4.9/alsa-pcm-use-dma_bytes-as-size-parameter-in-dma_mmap_coherent.patch