[PATCH AUTOSEL 6.14 215/642] selftests: pci_endpoint: Skip disabled BARs

[Sasha Levin <sashal@kernel.org>]

From: Niklas Cassel <cassel@kernel.org>

[ Upstream commit af1451b6738ec7cf91f2914f53845424959ec4ee ]

Currently BARs that have been disabled by the endpoint controller driver
will result in a test FAIL.

Returning FAIL for a BAR that is disabled seems overly pessimistic.

There are EPC that disables one or more BARs intentionally.

One reason for this is that there are certain EPCs that are hardwired to
expose internal PCIe controller registers over a certain BAR, so the EPC
driver disables such a BAR, such that the host will not overwrite random
registers during testing.

Such a BAR will be disabled by the EPC driver's init function, and the
BAR will be marked as BAR_RESERVED, such that it will be unavailable to
endpoint function drivers.

Let's return FAIL only for BARs that are actually enabled and failed the
test, and let's return skip for BARs that are not even enabled.

Signed-off-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20250123120147.3603409-4-cassel@kernel.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/testing/selftests/pci_endpoint/pci_endpoint_test.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c b/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c
index c267b822c1081..576c590b277b1 100644
--- a/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c
+++ b/tools/testing/selftests/pci_endpoint/pci_endpoint_test.c
@@ -65,6 +65,8 @@ TEST_F(pci_ep_bar, BAR_TEST)
 	int ret;
 
 	pci_ep_ioctl(PCITEST_BAR, variant->barno);
+	if (ret == -ENODATA)
+		SKIP(return, "BAR is disabled");
 	EXPECT_FALSE(ret) TH_LOG("Test failed for BAR%d", variant->barno);
 }
 
-- 
2.39.5