[U-Boot] [PATCH 2/3] fix: mvebu: pcie_dw: Allow probing empty PCIe slots

[kostap at marvell.com]

From: Konstantin Porotchkin <kostap at marvell.com>

This patch allows probing all PCIe nodes defined in DTS
even if there no device connected to such node (no link).
Without this fix the driver returns -ENODEV when the PCIe
link is down. As result the pci_init function stops
scanning bus on first empty PCIe slot and all devices
located in higher numbered buses are not discovered.

Signed-off-by: Konstantin Porotchkin <kostap at marvell.com>
Cc: Stefan Roese <sr at denx.de>
Cc: Igal Liberman <igall at marvell.com>
Cc: Nadav Haklai <nadavh at marvell.com>
---
 drivers/pci/pcie_dw_mvebu.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/pci/pcie_dw_mvebu.c b/drivers/pci/pcie_dw_mvebu.c
index d4776a9..05a0660 100644
--- a/drivers/pci/pcie_dw_mvebu.c
+++ b/drivers/pci/pcie_dw_mvebu.c
@@ -487,13 +487,13 @@ static int pcie_dw_mvebu_probe(struct udevice *dev)
 	/* Don't register host if link is down */
 	if (!pcie_dw_mvebu_pcie_link_up(pcie->ctrl_base, LINK_SPEED_GEN_3)) {
 		printf("PCIE-%d: Link down\n", dev->seq);
-		return -ENODEV;
+	} else {
+		printf("PCIE-%d: Link up (Gen%d-x%d, Bus%d)\n", dev->seq,
+		       pcie_dw_get_link_speed(pcie->ctrl_base),
+		       pcie_dw_get_link_width(pcie->ctrl_base),
+		       hose->first_busno);
 	}
 
-	printf("PCIE-%d: Link up (Gen%d-x%d, Bus%d)\n", dev->seq,
-	       pcie_dw_get_link_speed(pcie->ctrl_base),
-	       pcie_dw_get_link_width(pcie->ctrl_base), hose->first_busno);
-
 	pcie_dw_regions_setup(pcie);
 
 	/* Set the CLASS_REV of RC CFG header to PCI_CLASS_BRIDGE_PCI */
-- 
2.7.4