linux-kernel - Re: [PATCH v2 4/9] ALSA: hda/i915: Allow xe as match for i915_component_master

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 25 Jul 2023 12:04:19 +0200
From:   Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        alsa-devel@...a-project.org
Cc:     sound-open-firmware@...a-project.org, linux-kernel@...r.kernel.org,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Cezary Rojewski <cezary.rojewski@...el.com>,
        Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>,
        Daniel Baluta <daniel.baluta@....com>
Subject: Re: [PATCH v2 4/9] ALSA: hda/i915: Allow xe as match for
 i915_component_master_match

Hey,

On 2023-07-24 12:28, Pierre-Louis Bossart wrote:
> 
> 
> On 7/19/23 18:41, Maarten Lankhorst wrote:
>> xe is a new driver for intel GPU's that shares the sound related code
>> with i915.
>>
>> Don't allow it to be modprobed though; the module is not upstream yet
>> and we should exclusively use the EPROBE_DEFER mechanism.
> 
> I can't figure out what this comment means.
> 
> how would the -EPROBE_DEFER mechanism help if the driver that will
> trigger a new probe is not upstream?
> 
> Not following at all what you intended to explain.

What I mean is that there is code inside the current code that does 
request_module("i915"), the comment meant I didn't try to add any logic 
for request_module("xe"), as the driver is not merged yet.

Additionally I am removing the request_module logic, but this comment 
was written when I first tried the simple solution of request_module("xe").

Turns out telepathy is hard, and using -EPROBE_DEFER is much simpler. :-)

Cheers,
~Maarten