linux-kernel - Re: [PATCH v3 3/5] PCI: dwc: Free MSI in the error code path of dw_pcie_host

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Message-ID: <689f8a0f-ba79-da80-d0e3-24ef6814a9aa@arm.com>
Date:   Thu, 28 Mar 2019 17:08:43 +0000
From:   Robin Murphy <robin.murphy@....com>
To:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 3/5] PCI: dwc: Free MSI in the error code path of
 dw_pcie_host_init()

On 18/03/2019 09:56, Jisheng Zhang wrote:
> If we ever did some msi related initializations, we need to call
> dw_pcie_free_msi() in the error code path.
> 
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
> Acked-by: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
> ---
>   drivers/pci/controller/dwc/pcie-designware-host.c | 8 ++++++--
>   1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index a71b874ae3c0..585080699675 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -483,7 +483,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
>   	if (pp->ops->host_init) {
>   		ret = pp->ops->host_init(pp);
>   		if (ret)
> -			goto error;
> +			goto err_free_msi;
>   	}
>   
>   	pp->root_bus_nr = pp->busn->start;
> @@ -497,7 +497,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
>   
>   	ret = pci_scan_root_bus_bridge(bridge);
>   	if (ret)
> -		goto error;
> +		goto err_free_msi;
>   
>   	bus = bridge->bus;
>   
> @@ -513,6 +513,10 @@ int dw_pcie_host_init(struct pcie_port *pp)
>   	pci_bus_add_devices(bus);
>   	return 0;
>   
> +err_free_msi:
> +	if (IS_ENABLED(CONFIG_PCI_MSI) && pci_msi_enabled() &&

pci_msi_enabled() already has a stub for !CONFIG_PCI_MSI, so you 
shouldn't need an explicit IS_ENABLED() here.

Robin.

> +			!pp->ops->msi_host_init)
> +		dw_pcie_free_msi(pp);
>   error:
>   	pci_free_host_bridge(bridge);
>   	return ret;
>