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

Pali Rohár
2021-11-25T12:48:53Z

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@kernel.org>
Cc: stable@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