netdev - Re: [PATCH v3 2/3] bus: mhi: host: Add name for mhi

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Date: Fri, 28 Jun 2024 08:38:57 -0600
From: Jeffrey Hugo <quic_jhugo@...cinc.com>
To: Slark Xiao <slark_xiao@....com>, <manivannan.sadhasivam@...aro.org>,
        <loic.poulain@...aro.org>, <ryazanov.s.a@...il.com>,
        <johannes@...solutions.net>
CC: <netdev@...r.kernel.org>, <mhi@...ts.linux.dev>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/3] bus: mhi: host: Add name for mhi_controller

On 6/28/2024 1:36 AM, Slark Xiao wrote:
>   For SDX72 MBIM mode, it starts data mux id from 112 instead of 0.
>   This would lead to device can't ping outside successfully.
>   Also MBIM side would report "bad packet session (112)".

Weird indentation

>   In oder to fix this issue, we decide to use the modem name

"order"

> to do a match in client driver side. Then client driver could
> set a corresponding mux_id value for this modem product.
> 
> Signed-off-by: Slark Xiao <slark_xiao@....com>
> ---
>   drivers/bus/mhi/host/pci_generic.c | 1 +
>   include/linux/mhi.h                | 2 ++
>   2 files changed, 3 insertions(+)
> 
> diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
> index 1fb1c2f2fe12..14a11880bcea 100644
> --- a/drivers/bus/mhi/host/pci_generic.c
> +++ b/drivers/bus/mhi/host/pci_generic.c
> @@ -1086,6 +1086,7 @@ static int mhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>   	mhi_cntrl->runtime_get = mhi_pci_runtime_get;
>   	mhi_cntrl->runtime_put = mhi_pci_runtime_put;
>   	mhi_cntrl->mru = info->mru_default;
> +	mhi_cntrl->name = info->name;
>   
>   	if (info->edl_trigger)
>   		mhi_cntrl->edl_trigger = mhi_pci_generic_edl_trigger;
> diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> index b573f15762f8..86aa4f52842c 100644
> --- a/include/linux/mhi.h
> +++ b/include/linux/mhi.h
> @@ -361,6 +361,7 @@ struct mhi_controller_config {
>    * @wake_set: Device wakeup set flag
>    * @irq_flags: irq flags passed to request_irq (optional)
>    * @mru: the default MRU for the MHI device
> + * @name: name of the modem

Why restrict this to modems?  There are plenty of other MHI devices

>    *
>    * Fields marked as (required) need to be populated by the controller driver
>    * before calling mhi_register_controller(). For the fields marked as (optional)
> @@ -445,6 +446,7 @@ struct mhi_controller {
>   	bool wake_set;
>   	unsigned long irq_flags;
>   	u32 mru;
> +	const char *name;

Please run pahole

>   };
>   
>   /**