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fix: mvebu: pcie_dw: Allow probing empty PCIe slots

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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@marvell.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Igal Liberman <igall@marvell.com>
Cc: Nadav Haklai <nadavh@marvell.com>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Konstantin Porotchkin 2017-03-28 18:36:34 +03:00 committed by Stefan Roese
parent 2f720f1957
commit 3f75e0ce7b
1 changed files with 5 additions and 5 deletions
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10
drivers/pci/pcie_dw_mvebu.c
View file

@ -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 */