[PATCH 1/4] x86/of: Return consistent error type from x86_of_pci_irq_enable()

["Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>]

x86_of_pci_irq_enable() returns PCIBIOS_* code received from
pci_read_config_byte() directly and also -EINVAL which are not
compatible error types. x86_of_pci_irq_enable() is used as
(*pcibios_enable_irq) function which should not return PCIBIOS_* codes.

Convert the PCIBIOS_* return code from pci_read_config_byte() into
normal errno using pcibios_err_to_errno().

Fixes: 96e0a0797eba ("x86: dtb: Add support for PCI devices backed by dtb nodes")
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Cc: stable@vger.kernel.org
---
 arch/x86/kernel/devicetree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 8e3c53b4d070..64280879c68c 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -83,7 +83,7 @@ static int x86_of_pci_irq_enable(struct pci_dev *dev)
 
 	ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
 	if (ret)
-		return ret;
+		return pcibios_err_to_errno(ret);
 	if (!pin)
 		return 0;
 
-- 
2.39.2