Re: [PATCH v4 09/18] PCI: rcar-gen4: Add Root Port reset support

[Marek Vasut <marek.vasut@mailbox.org>]

On 10/15/26 5:30 AM, Koichiro Den wrote:

[...]

> +static void rcar_gen4_pcie_app_irq_sync(struct rcar_gen4_pcie *rcar)
> +{
> +	guard(raw_spinlock_irqsave)(&rcar->app_lock);
> +
> +	rcar_gen4_pcie_app_irq_sync_locked(rcar);
> +}
> +
>   static int rcar_gen4_pcie_host_msi_init(struct dw_pcie_rp *pp)
>   {
>   	struct dw_pcie *dw = to_dw_pcie_from_pp(pp);
>   	struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw);
> +	unsigned long flags;
>   	u32 val;
>   	int ret;
>   
> @@ -543,12 +589,7 @@ static int rcar_gen4_pcie_host_msi_init(struct dw_pcie_rp *pp)
>   	}
>   
>   	/* Configure MSI interrupt signal */
> -	val = readl(rcar->base + PCIEINTSTS0EN);
> -	if (pci_msi_enabled())
> -		val |= MSI_CTRL_INT;
> -	else
> -		val &= ~MSI_CTRL_INT;
> -	writel(val, rcar->base + PCIEINTSTS0EN);
> +	rcar_gen4_pcie_app_irq_sync(rcar);
>   
>   	return 0;
>   
> @@ -563,9 +604,11 @@ static int rcar_gen4_pcie_host_msi_init(struct dw_pcie_rp *pp)
>   	writel(0, rcar->base + AXIINTCCONT);
>   
>   	/* Deconfigure MSI interrupt signal */
> +	raw_spin_lock_irqsave(&rcar->app_lock, flags);

This is only a small nitpick. I wonder if you could use the same 
scoped_guard() {} call here instead of the raw_spin_lock_irqsave() and 
raw_spin_unlock_irqrestore() pair?

scoped_guard(raw_spinlock_irqsave, &rcar->app_lock) {

>   	val = readl(rcar->base + PCIEINTSTS0EN);
>   	val &= ~MSI_CTRL_INT;
>   	writel(val, rcar->base + PCIEINTSTS0EN);

}

> +	raw_spin_unlock_irqrestore(&rcar->app_lock, flags);
>   
>   	return ret;
>   }

Either way, this patch is

Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>

Thank you !