PCI: endpoint: Handle 64-bit BARs properly
If a 64-bit BAR was set-up, we need to skip a BAR,
since a 64-bit BAR consists of a BAR pair.
We need to check what BAR width the epc->ops->set_bar() specific
implementation actually did set-up, since some drivers, like the
Cadence EP controller, sometimes sets up a 64-bit BAR, even though
a 32-bit BAR was requested.
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index 9127477..d46e3eb 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -380,6 +380,13 @@ static int pci_epf_test_set_bar(struct pci_epf *epf)
if (bar == test_reg_bar)
return ret;
}
+ /*
+ * pci_epc_set_bar() sets PCI_BASE_ADDRESS_MEM_TYPE_64
+ * if the specific implementation required a 64-bit BAR,
+ * even if we only requested a 32-bit BAR.
+ */
+ if (epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64)
+ bar++;
}
return 0;