From: Michael Walle <michael@walle.cc>
Date: Sun, 1 Dec 2019 16:45:18 +0000 (+0100)
Subject: drivers: pci: ignore disabled devices
X-Git-Url: http://git.dujemihanovic.xyz/img/static/git-favicon.png?a=commitdiff_plain;h=a6cd597a78dd9b7fcaba6fe4891f29e86646541b;p=u-boot.git

drivers: pci: ignore disabled devices

PCI devices may be disabled in the device tree. Devices which are probed
by the device tree handle the "status" property and are skipped if
disabled. Devices which are probed by the PCI enumeration don't check
that property. Fix it.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Alex Marginean <alexandru.marginean@nxp.com>
Tested-by: Alex Marginean <alexandru.marginean@nxp.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---

diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 896cb6b23a..fab20fc60e 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -677,6 +677,11 @@ static int pci_find_and_bind_driver(struct udevice *parent,
 	/* Determine optional OF node */
 	pci_dev_find_ofnode(parent, bdf, &node);
 
+	if (ofnode_valid(node) && !ofnode_is_available(node)) {
+		debug("%s: Ignoring disabled device\n", __func__);
+		return -EPERM;
+	}
+
 	start = ll_entry_start(struct pci_driver_entry, pci_driver_entry);
 	n_ents = ll_entry_count(struct pci_driver_entry, pci_driver_entry);
 	for (entry = start; entry != start + n_ents; entry++) {