Commit d8dbd21c authored by Damien Le Moal's avatar Damien Le Moal Committed by Bjorn Helgaas
Browse files

PCI: rockchip-ep: Improve rockchip_pcie_ep_map_addr() 

Add a check to verify that the outbound region to be used for mapping an
address is not already in use.

Link: https://lore.kernel.org/r/20241017015849.190271-5-dlemoal@kernel.org


Signed-off-by: default avatarDamien Le Moal <dlemoal@kernel.org>
Signed-off-by: default avatarKrzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
parent 57ed93fe

drivers/pci/controller/pcie-rockchip-ep.c

+3 −0
Original line number Diff line number Diff line
@@ -246,6 +246,9 @@ 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);