linux-kernel - [PATCH v9 1/7] PCI: dwc: Use resource start as iomap() input in dw_pcie_pme_turn

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Message-Id: <20250128-pci_fixup_addr-v9-1-3c4bb506f665@nxp.com>
Date: Tue, 28 Jan 2025 17:07:34 -0500
From: Frank Li <Frank.Li@....com>
To: Rob Herring <robh@...nel.org>, Saravana Kannan <saravanak@...gle.com>, 
 Jingoo Han <jingoohan1@...il.com>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kw@...ux.com>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, Richard Zhu <hongxing.zhu@....com>, 
 Lucas Stach <l.stach@...gutronix.de>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-pci@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 imx@...ts.linux.dev, Niklas Cassel <cassel@...nel.org>, 
 Frank Li <Frank.Li@....com>
Subject: [PATCH v9 1/7] PCI: dwc: Use resource start as iomap() input in
 dw_pcie_pme_turn_off()

Pass resource start as the input argument to iomap() instead of
atu.cpu_address in dw_pcie_pme_turn_off(). While atu.cpu_address happens to
be the same here, it actually represents the parent bus address before ATU,
which may not always align with the CPU address. Using resource start
ensures correctness and clarity.

Signed-off-by: Frank Li <Frank.Li@....com>
---
change from v9 to v10
- new patch
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index ffaded8f2df7b..ae3fd2a5dbf85 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -908,7 +908,7 @@ static int dw_pcie_pme_turn_off(struct dw_pcie *pci)
 	if (ret)
 		return ret;
 
-	mem = ioremap(atu.cpu_addr, pci->region_align);
+	mem = ioremap(pci->pp.msg_res->start, pci->region_align);
 	if (!mem)
 		return -ENOMEM;
 

-- 
2.34.1