linux-kernel - [PATCH 3/7] PCI: apple: Set only available ports up

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Message-Id: <20250211-pcie-t6-v1-3-b60e6d2501bb@rosenzweig.io>
Date: Tue, 11 Feb 2025 14:54:28 -0500
From: Alyssa Rosenzweig <alyssa@...enzweig.io>
To: Hector Martin <marcan@...can.st>, Sven Peter <sven@...npeter.dev>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kw@...ux.com>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Mark Kettenis <kettenis@...nbsd.org>, 
 Marc Zyngier <maz@...nel.org>, Stan Skowronek <stan@...ellium.com>
Cc: asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-pci@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Alyssa Rosenzweig <alyssa@...enzweig.io>, 
 Janne Grunau <j@...nau.net>, stable@...r.kernel.org
Subject: [PATCH 3/7] PCI: apple: Set only available ports up

From: Janne Grunau <j@...nau.net>

Fixes "interrupt-map" parsing in of_irq_parse_raw() which takes the
node's availability into account.

This became apparent after disabling unused PCIe ports in the Apple
silicon device trees instead of disabling them.

Link: https://lore.kernel.org/asahi/20230214-apple_dts_pcie_disable_unused-v1-0-5ea0d3ddcde3@jannau.net/
Link: https://lore.kernel.org/asahi/1ea2107a-bb86-8c22-0bbc-82c453ab08ce@linaro.org/
Fixes: 1e33888fbe44 ("PCI: apple: Add initial hardware bring-up")
Cc: stable@...r.kernel.org
Signed-off-by: Janne Grunau <j@...nau.net>
Signed-off-by: Alyssa Rosenzweig <alyssa@...enzweig.io>
---
 drivers/pci/controller/pcie-apple.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c
index 8ea3e258fe2768a33ec56f0a8a86d168ed615973..958cf459d4c64dffa1f993e57b7a58cfb2199b8f 100644
--- a/drivers/pci/controller/pcie-apple.c
+++ b/drivers/pci/controller/pcie-apple.c
@@ -758,7 +758,7 @@ static int apple_pcie_init(struct pci_config_window *cfg)
 	if (ret)
 		return ret;
 
-	for_each_child_of_node(dev->of_node, of_port) {
+	for_each_available_child_of_node(dev->of_node, of_port) {
 		ret = apple_pcie_setup_port(pcie, of_port);
 		if (ret) {
 			dev_err(pcie->dev, "Port %pOF setup fail: %d\n", of_port, ret);

-- 
2.48.1