For platforms with a limited iATU inbound window entries, pci_epc_set_bar() might fail to allocate the ATU entries for subrange maps requiring more than 1 slot. For the dwc controller, this failure is reported with -ENOSPC in dw_pcie_ep_set_bar(). In this case, the epf test cannot be run and needs to be skipped.
For other controllers (Rockchip, RCar, Cadence) the .set_bar functions do not use this error. Signed-off-by: Christian Bruel <[email protected]> --- Changes in v3: - Remove 'BAR' from SKIP print message (Niklas) - Added 'Reviewed-by: Niklas Cassel <[email protected]>' tag - Link to v2: https://lore.kernel.org/r/20260323-skip-bar_subrange-tests-if-enospc-v2-0-2080f8781...@foss.st.com Changes in v2: - Rebased, reordered patches - Clarified reporting message in selftest - Renamed STATUS_BAR_SUBRANGE_SETUP_NOPSC STATUS_NO_RESOURCE - Link to v1: https://lore.kernel.org/r/20260318-skip-bar_subrange-tests-if-enospc-v1-0-f1a49534e...@foss.st.com --- Christian Bruel (3): PCI: endpoint: pci-epf-test: Handle -ENOSPC in subrange_setup misc: pci_endpoint_test: Handle -ENOSPC in subrange mapping test case selftests: pci_endpoint: Skip BAR subrange test on -ENOSPC drivers/misc/pci_endpoint_test.c | 3 ++- drivers/pci/endpoint/functions/pci-epf-test.c | 3 +++ tools/testing/selftests/pci_endpoint/pci_endpoint_test.c | 2 ++ 3 files changed, 7 insertions(+), 1 deletion(-) --- base-commit: 785f0eb2f85decbe7c1ef9ae922931f0194ffc2e change-id: 20260318-skip-bar_subrange-tests-if-enospc-c26f03038e92 Best regards, -- Christian Bruel <[email protected]>
