From: Bin Meng <bmeng.cn@gmail.com>
Date: Fri, 8 Jan 2016 09:03:21 +0000 (-0800)
Subject: pci: layerscape: Adjust the return value when ls_pcie_addr_valid() fails
X-Git-Tag: v2016.01~6
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=7ba34ff09f1ef105521f914e4ad4e4ac19975bac;p=oweals%2Fu-boot.git

pci: layerscape: Adjust the return value when ls_pcie_addr_valid() fails

When trying to access non-existent/unsupported PCI devices in
ls_pcie_read_config(), when ls_pcie_addr_valid() fails it returns
error code and fills in the result with 0xffffffff manually. But it
really should return zero to upper layer codes.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
---

diff --git a/drivers/pci/pcie_layerscape.c b/drivers/pci/pcie_layerscape.c
index 58e88ae45e..99f9c83fa4 100644
--- a/drivers/pci/pcie_layerscape.c
+++ b/drivers/pci/pcie_layerscape.c
@@ -314,7 +314,7 @@ static int ls_pcie_read_config(struct pci_controller *hose, pci_dev_t d,
 
 	if (ls_pcie_addr_valid(hose, d)) {
 		*val = 0xffffffff;
-		return -EINVAL;
+		return 0;
 	}
 
 	if (PCI_BUS(d) == hose->first_busno) {