linux-kernel - Re: [PATCH] ASoC: fsl: fsl_qmc_audio: Reset audio data pointers on TRIGGER

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Message-ID: <4b42c00a-0ef5-4121-9e40-9214bf9a1197@csgroup.eu>
Date: Mon, 28 Apr 2025 11:20:42 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Mark Brown <broonie@...nel.org>, Shengjiu Wang <shengjiu.wang@...il.com>,
 Xiubo Li <Xiubo.Lee@...il.com>, Fabio Estevam <festevam@...il.com>,
 Nicolin Chen <nicoleotsuka@...il.com>, Liam Girdwood <lgirdwood@...il.com>,
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
 Herve Codina <herve.codina@...tlin.com>
Cc: linux-sound@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
 linux-kernel@...r.kernel.org, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, stable@...r.kernel.org
Subject: Re: [PATCH] ASoC: fsl: fsl_qmc_audio: Reset audio data pointers on
 TRIGGER_START event

Hi Mark,


Le 10/04/2025 à 15:47, Mark Brown a écrit :
> On Thu, 10 Apr 2025 11:16:43 +0200, Herve Codina wrote:
>> On SNDRV_PCM_TRIGGER_START event, audio data pointers are not reset.
>>
>> This leads to wrong data buffer usage when multiple TRIGGER_START are
>> received and ends to incorrect buffer usage between the user-space and
>> the driver. Indeed, the driver can read data that are not already set by
>> the user-space or the user-space and the driver are writing and reading
>> the same area.
>>
>> [...]
> 
> Applied to
> 
>     https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit.kernel.org%2Fpub%2Fscm%2Flinux%2Fkernel%2Fgit%2Fbroonie%2Fsound.git&data=05%7C02%7Cchristophe.leroy%40csgroup.eu%7C438de093b4c04d4c0a8f08dd78362e30%7C8b87af7d86474dc78df45f69a2011bb5%7C0%7C0%7C638798896267382068%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=d%2FuL%2FFAOcpRY2v9YtxTMdiX%2B3GgHKDE7y5TMTc9cK94%3D&reserved=0 for-next

Would it be possible to get this patch into one of the v6.15 rc as it is 
a bug fix ?

Thanks
Christophe

> 
> Thanks!
> 
> [1/1] ASoC: fsl: fsl_qmc_audio: Reset audio data pointers on TRIGGER_START event
>        commit: 9aa33d5b4a53a1945dd2aee45c09282248d3c98b
> 
> All being well this means that it will be integrated into the linux-next
> tree (usually sometime in the next 24 hours) and sent to Linus during
> the next merge window (or sooner if it is a bug fix), however if
> problems are discovered then the patch may be dropped or reverted.
> 
> You may get further e-mails resulting from automated or manual testing
> and review of the tree, please engage with people reporting problems and
> send followup patches addressing any issues that are reported if needed.
> 
> If any updates are required or you are submitting further changes they
> should be sent as incremental updates against current git, existing
> patches will not be replaced.
> 
> Please add any relevant lists and maintainers to the CCs when replying
> to this mail.
> 
> Thanks,
> Mark
>