linux-kernel - Re: [PATCH net] bus: mhi: Add mru

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Date:   Sun, 23 Jan 2022 23:22:00 +0530
From:   Manivannan Sadhasivam <mani@...nel.org>
To:     Slark Xiao <slark_xiao@....com>
Cc:     hemantk@...eaurora.org, thomas.ulrich@...lesgroup.com,
        gregkh@...uxfoundation.org, mhi@...ts.linux.dev,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] bus: mhi: Add mru_default for Cinterion MV31-W

On Wed, Jan 19, 2022 at 06:25:19PM +0800, Slark Xiao wrote:
> 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.
> We also validate it with Cinterion product and find it also
> works.
> 
> Fixes: 87693e092bd0 ("bus: mhi: pci_generic: Add Cinterion MV31-W PCIe to MHI")
> Signed-off-by: Slark Xiao <slark_xiao@....com>

Applied to mhi-next with slight commit message change.

Thanks,
Mani

> ---
>  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..79c16b2a52c7 100644
> --- a/drivers/bus/mhi/pci_generic.c
> +++ b/drivers/bus/mhi/pci_generic.c
> @@ -401,6 +401,7 @@ static const struct mhi_pci_dev_info mhi_mv31_info = {
>  	.config = &modem_mv31_config,
>  	.bar_num = MHI_PCI_DEFAULT_BAR_NUM,
>  	.dma_data_width = 32,
> +	.mru_default = 32768,
>  };
>  
>  static const struct mhi_channel_config mhi_sierra_em919x_channels[] = {
> -- 
> 2.25.1
>