linux-kernel - [PATCH v2 03/13] PCI: ecam: Allow cfg->priv to be pre-populated from the root port device

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Message-Id: <20250325102610.2073863-4-maz@kernel.org>
Date: Tue, 25 Mar 2025 10:26:00 +0000
From: Marc Zyngier <maz@...nel.org>
To: linux-arm-kernel@...ts.infradead.org,
	linux-pci@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	asahi@...ts.linux.dev
Cc: Alyssa Rosenzweig <alyssa@...enzweig.io>,
	Janne Grunau <j@...nau.net>,
	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>
Subject: [PATCH v2 03/13] PCI: ecam: Allow cfg->priv to be pre-populated from the root port device

In order to decouple ecam config space creation from probing via
pci_host_common_probe(), allow the private pointer to be populated
via the device drvdata pointer.

Crucially, this is set before calling ops->init(), allowing that
particular callback to have access to probe data.

This should have no impact on existing code which ignores the
current value of cfg->priv.

Signed-off-by: Marc Zyngier <maz@...nel.org>
---
 drivers/pci/ecam.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pci/ecam.c b/drivers/pci/ecam.c
index 260b7de2dbd57..2c5e6446e00ee 100644
--- a/drivers/pci/ecam.c
+++ b/drivers/pci/ecam.c
@@ -84,6 +84,8 @@ struct pci_config_window *pci_ecam_create(struct device *dev,
 			goto err_exit_iomap;
 	}
 
+	cfg->priv = dev_get_drvdata(dev);
+
 	if (ops->init) {
 		err = ops->init(cfg);
 		if (err)
-- 
2.39.2