From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Date: Wed, 21 Nov 2012 18:25:28 +0000 (-0700)
Subject: ARM: Kirkwood: Support basic hotplug for PCI-E
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b73690c8f8b5d12ed32e10fb787f54e4b4ca232b;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

ARM: Kirkwood: Support basic hotplug for PCI-E

Unconditionally register the PCI-E bus, even if the link is currently
down. When the link is brought up the bus can be scanned through
/sys/bus/pci/rescan or otherwise. Since the HW has no interrupt for
link up, userspace will have to take care of the timing.

An earlier version of this was contingent on CONFIG_HOTPLUG, but
that is being removed from the kernel.

This also fixes printing the link up/down message to be displayed
on one line (structured logging broke this?)

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
---

diff --git a/arch/arm/mach-kirkwood/pcie.c b/arch/arm/mach-kirkwood/pcie.c
index a1c3ab6fc809..d96ad4c09972 100644
--- a/arch/arm/mach-kirkwood/pcie.c
+++ b/arch/arm/mach-kirkwood/pcie.c
@@ -247,13 +247,9 @@ static struct hw_pci kirkwood_pci __initdata = {
 
 static void __init add_pcie_port(int index, void __iomem *base)
 {
-	pr_info("Kirkwood PCIe port %d: ", index);
-
-	if (orion_pcie_link_up(base)) {
-		pr_info("link up\n");
-		pcie_port_map[num_pcie_ports++] = index;
-	} else
-		pr_info("link down, ignoring\n");
+	pcie_port_map[num_pcie_ports++] = index;
+	pr_info("Kirkwood PCIe port %d: link %s\n", index,
+		orion_pcie_link_up(base) ? "up" : "down");
 }
 
 void __init kirkwood_pcie_init(unsigned int portmask)