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PCI: rockchip-ep: Improve rockchip_pcie_ep_map_addr()

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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: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Damien Le Moal
2024-10-17 10:58:39 +09:00
committed by Bjorn Helgaas
parent 57ed93fe79
commit d8dbd21cfa
1 changed files with 3 additions and 0 deletions
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3
drivers/pci/controller/pcie-rockchip-ep.c
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@@ -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);