linux-kernel - Re: [PATCH net v2] For default mechanism, product would use default MRU 3500 if they didn't define it. But for Foxconn SDX55, there is a known issue which MRU 3500 would lead to data connection lost. So we align it with Qualcomm default MRU settings.

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Message-ID: <20220117084432.GB4209@thinkpad>
Date:   Mon, 17 Jan 2022 14:14:32 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Slark Xiao <slark_xiao@....com>
Cc:     hemantk@...eaurora.org, mhi@...ts.linux.dev,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v2] For default mechanism, product would use default
 MRU 3500 if they didn't define it. But for Foxconn SDX55, there is a known
 issue which MRU 3500 would lead to data connection lost. So we align it with
 Qualcomm default MRU settings.

On Mon, Jan 17, 2022 at 04:16:44PM +0800, Slark Xiao wrote:
> Fixes: 5c2c85315948 ("bus: mhi: pci-generic: configurable network interface MRU")

You have messed up the patch subject, please fix it. Also, the correct fixes tag
should be the one added the Foxconn modem support, precisely "aac426562f56".

One more thing, please make sure this MRU value works well for other Foxconn
modems supported by this config.

> Signed-off-by: Slark Xiao <slark_xiao@....com>

You should have added my Reviewed-by tag too...

Thanks,
Mani

> 
> ---
> v2: Add Fixes tag
> ---
>  drivers/bus/mhi/pci_generic.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
> index 3a258a677df8..74e8fc342cfd 100644
> --- a/drivers/bus/mhi/pci_generic.c
> +++ b/drivers/bus/mhi/pci_generic.c
> @@ -366,6 +366,7 @@ static const struct mhi_pci_dev_info mhi_foxconn_sdx55_info = {
>  	.config = &modem_foxconn_sdx55_config,
>  	.bar_num = MHI_PCI_DEFAULT_BAR_NUM,
>  	.dma_data_width = 32,
> +	.mru_default = 32768,
>  	.sideband_wake = false,
>  };
>  
> -- 
> 2.25.1
>