[PATCH v2 2/5] PCI: dwc: Check alloc_page() return value

[Gustavo Pimentel]

On Thu, Sep 24, 2020 at 12:6:23, Jisheng Zhang 
<Jisheng.Zhang at synaptics.com> wrote:

> We need to check alloc_page() succeed or not before continuing.
> 
> Signed-off-by: Jisheng Zhang <Jisheng.Zhang at synaptics.com>
> ---
>  drivers/pci/controller/dwc/pcie-designware-host.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index 0a19de946351..9e04e8ef3aa4 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -303,6 +303,11 @@ void dw_pcie_msi_init(struct pcie_port *pp)
>  	u64 msi_target;
>  
>  	pp->msi_page = alloc_page(GFP_KERNEL);
> +	if (!pp->msi_page) {
> +		dev_err(dev, "Failed to alloc MSI page\n");
> +		return;
> +	}
> +
>  	pp->msi_data = dma_map_page(dev, pp->msi_page, 0, PAGE_SIZE,
>  				    DMA_FROM_DEVICE);
>  	if (dma_mapping_error(dev, pp->msi_data)) {
> -- 
> 2.28.0

Acked-by: Gustavo Pimentel <gustavo.pimentel at synopsys.com>