linux-kernel - Re: debug_dma_assert_idle - snd_hda_intel - cpu touching an active dma mapped cacheline

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Date:	Thu, 01 May 2014 07:07:42 +0200
From:	poma <pomidorabelisima@...il.com>
To:	Takashi Iwai <tiwai@...e.de>
CC:	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Clemens Ladisch <clemens@...isch.de>,
	Mailing-List fedora-kernel <kernel@...ts.fedoraproject.org>,
	Dan Williams <dan.j.williams@...el.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Sander Eikelenboom <linux@...elenboom.it>,
	Dave Jones <davej@...hat.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Francois Romieu <romieu@...zoreil.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Wei Liu <wei.liu2@...rix.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: debug_dma_assert_idle - snd_hda_intel - cpu touching an active
 dma mapped cacheline


$ file *
linux-3.15.0-0.rc3.git1.10.fc21.i686: directory
linux-3.15.0-0.rc3.git2.1.fc21.i686:  directory
linux-3.15.0-0.rc3.git3.1.fc21.i686:  directory
$
$ grep -R AZX_DCAPS_CORBRP_SELF_CLEAR 
linux-3.15.0-0.rc3.git3.1.fc21.i686/sound/pci/hda/hda_intel.c:	 AZX_DCAPS_CORBRP_SELF_CLEAR)
linux-3.15.0-0.rc3.git3.1.fc21.i686/sound/pci/hda/hda_controller.c:	if (!(chip->driver_caps & AZX_DCAPS_CORBRP_SELF_CLEAR)) {
linux-3.15.0-0.rc3.git3.1.fc21.i686/sound/pci/hda/hda_priv.h:#define AZX_DCAPS_CORBRP_SELF_CLEAR (1 << 28)	/* CORBRP clears itself after reset */
$ 
$ uname -r
3.15.0-0.rc3.git3.1.fc21.i686  PASSED

Referent commit
ALSA: hda - Suppress CORBRP clear on Nvidia controller chips
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/sound/pci/hda?id=6ba736d

Eye Of The Tiger, Takashi!


poma


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