diff options
| author | Damien Le Moal <dlemoal@kernel.org> | 2024-10-17 10:58:39 +0900 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2024-11-25 13:18:35 -0600 |
| commit | d8dbd21cfafd653b02ec187e59e0bcfaebd9a884 (patch) | |
| tree | 9eb8901ef3e90fa99ffc88caeb2d51e4426990cc /drivers/pci/controller | |
| parent | 57ed93fe799b3564388fd61279fc274ae2716508 (diff) | |
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: 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>
Diffstat (limited to 'drivers/pci/controller')
| -rw-r--r-- | drivers/pci/controller/pcie-rockchip-ep.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/pci/controller/pcie-rockchip-ep.c b/drivers/pci/controller/pcie-rockchip-ep.c index b4db5459727f..24ee1df17a49 100644 --- a/drivers/pci/controller/pcie-rockchip-ep.c +++ b/drivers/pci/controller/pcie-rockchip-ep.c @@ -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); |