From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johan Hovold Subject: Re: [PATCH 1/2] ASoC: fix pcm-creation regression Date: Mon, 17 Jul 2017 10:03:48 +0200 Message-ID: <20170717080348.GZ29638@localhost> References: <20170712155530.17765-1-johan@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: stable-owner@vger.kernel.org To: Linus Walleij Cc: Johan Hovold , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , "alsa-devel@alsa-project.org" , Kuninori Morimoto , "linux-kernel@vger.kernel.org" , stable , Brian Norris List-Id: alsa-devel@alsa-project.org On Fri, Jul 14, 2017 at 03:35:46PM +0200, Linus Walleij wrote: > On Wed, Jul 12, 2017 at 5:55 PM, Johan Hovold wrote: > > > This reverts commit 99b04f4c4051 ("ASoC: add Component level > > pcm_new/pcm_free"), which started calling the pcm_new callback for every > > component in a *card* when creating a new pcm, something which does not > > seem to make any sense. > > > > This specifically led to memory leaks in systems with more than one > > platform component and where DMA memory is allocated in the > > platform-driver callback. For example, when both mcasp devices are being > > used on an am335x board, DMA memory would be allocated twice for every > > DAI link during probe. > > > > When CONFIG_SND_VERBOSE_PROCFS was set this fortunately also led to > > warnings such as: > > > > WARNING: CPU: 0 PID: 565 at ../fs/proc/generic.c:346 proc_register+0x110/0x154 > > proc_dir_entry 'sub0/prealloc' already registered > > > > Since there seems to be no users of the new component callbacks, and the > > current implementation introduced a regression, let's revert the > > offending commit for now. > > > > Fixes: 99b04f4c4051 ("ASoC: add Component level pcm_new/pcm_free") > > Cc: stable # 4.10 > > Cc: Kuninori Morimoto > > Cc: Brian Norris > > Signed-off-by: Johan Hovold > > I have repeatedly ran into this bug, thanks a *lot* for fixing it. > It solves a problem not only on this old code but also in my > development tree where I try to move the Ux500 audio to DT-only > instantiation and this was a blocker that I just ran my head into > the last month or two. > > Reviewed-by: Linus Walleij > Tested-by: Linus Walleij Thanks for testing these, Linus. Johan