[PATCH 04/15] PCI: mvebu: Handle invalid size of read config request

[Pali Rohár]

Function mvebu_pcie_hw_rd_conf() does not handle invalid size. So correctly
set read value to all-ones and return appropriate error return value
PCIBIOS_BAD_REGISTER_NUMBER like in mvebu_pcie_hw_wr_conf() function.

Signed-off-by: Pali Rohár <pali at kernel.org>
Cc: stable at vger.kernel.org
---
 drivers/pci/controller/pci-mvebu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c
index 08274132cdfb..19c6ee298442 100644
--- a/drivers/pci/controller/pci-mvebu.c
+++ b/drivers/pci/controller/pci-mvebu.c
@@ -261,6 +261,9 @@ static int mvebu_pcie_hw_rd_conf(struct mvebu_pcie_port *port,
 	case 4:
 		*val = readl_relaxed(conf_data);
 		break;
+	default:
+		*val = 0xffffffff;
+		return PCIBIOS_BAD_REGISTER_NUMBER;
 	}
 
 	return PCIBIOS_SUCCESSFUL;
-- 
2.20.1