[PATCH v3 04/12] PCI: rockchip-ep: Improve rockchip_pcie_ep_map_addr()

[Manivannan Sadhasivam]

On Mon, Oct 07, 2024 at 01:12:10PM +0900, Damien Le Moal wrote:
> Add a check to verify that the outbound region to be used for mapping an
> address is not already in use.
> 
> Signed-off-by: Damien Le Moal <dlemoal at kernel.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>

- Mani

> ---
>  drivers/pci/controller/pcie-rockchip-ep.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c
> index 89ebdf3e4737..edb84fb1ba39 100644
> --- a/drivers/pci/controller/pcie-rockchip-ep.c
> +++ b/drivers/pci/controller/pcie-rockchip-ep.c
> @@ -243,6 +243,9 @@ static int rockchip_pcie_ep_map_addr(struct pci_epc *epc, u8 fn, u8 vfn,
>  	struct rockchip_pcie *pcie = &ep->rockchip;
>  	u32 r = rockchip_ob_region(addr);
>  
> +	if (test_bit(r, &ep->ob_region_map))
> +		return -EBUSY;
> +
>  	rockchip_pcie_prog_ep_ob_atu(pcie, fn, r, addr, pci_addr, size);
>  
>  	set_bit(r, &ep->ob_region_map);
> -- 
> 2.46.2
> 

-- 
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