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Message-Id: <20250315201548.858189-2-helgaas@kernel.org>
Date: Sat, 15 Mar 2025 15:15:36 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: 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 WilczyĆski <kw@...ux.com>,
Richard Zhu <hongxing.zhu@....com>,
Lucas Stach <l.stach@...gutronix.de>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
Niklas Cassel <cassel@...nel.org>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-pci@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
imx@...ts.linux.dev,
Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [PATCH v12 01/13] PCI: dwc: Use resource start as iomap() input in dw_pcie_pme_turn_off()
From: Frank Li <Frank.Li@....com>
The msg_res region translates writes into PCIe Message TLPs. Previously we
mapped this region using atu.cpu_addr, the input address programmed into
the ATU.
"cpu_addr" is a misnomer because when a bus fabric translates addresses
between the CPU and the ATU, the ATU input address is different from the
CPU address. A future patch will rename "cpu_addr" and correct the value
to be the ATU input address instead of the CPU physical address.
Map the msg_res region before writing to it using the msg_res resource
start, a CPU physical address.
Link: https://lore.kernel.org/r/20250313-pci_fixup_addr-v11-1-01d2313502ab@nxp.com
Signed-off-by: Frank Li <Frank.Li@....com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
---
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 ffaded8f2df7..ae3fd2a5dbf8 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
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