linux-kernel - Re: [PATCH v6 2/2] misc: fastrpc: Increase unsigned PD initmem size

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Message-ID: <cr6xv4tsk23sjynnucve4366fwvffgq3rjnbkpxhzdfeiktwtr@ydrp3mduapui>
Date: Mon, 22 Jul 2024 11:34:42 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Ekansh Gupta <quic_ekangupt@...cinc.com>
Cc: srinivas.kandagatla@...aro.org, linux-arm-msm@...r.kernel.org, 
	gregkh@...uxfoundation.org, quic_bkumar@...cinc.com, linux-kernel@...r.kernel.org, 
	quic_chennak@...cinc.com, dri-devel@...ts.freedesktop.org, arnd@...db.de, 
	stable <stable@...nel.org>
Subject: Re: [PATCH v6 2/2] misc: fastrpc: Increase unsigned PD initmem size

On Mon, Jul 22, 2024 at 01:32:00PM GMT, Ekansh Gupta wrote:
> For unsigned PD offloading requirement, additional memory is required
> because of additional static heap initialization. Without this
> additional memory, PD initialization would fail. Increase the initmem
> size by 2MB for unsigned PD initmem buffer allocation. Any additional
> memory sent to DSP during PD init is used as the PD heap.

>From the previous commit message I had the feeling that DSP can request
more memory if required. Currently you are stating that PD init would
fail if it doesn't have enough mem.

> 
> Fixes: 7f1f481263c3 ("misc: fastrpc: check before loading process to the DSP")
> Cc: stable <stable@...nel.org>
> Signed-off-by: Ekansh Gupta <quic_ekangupt@...cinc.com>
> ---
>  drivers/misc/fastrpc.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 

-- 
With best wishes
Dmitry