diff mbox series

[v12,01/13] PCI: dwc: Use resource start as iomap() input in dw_pcie_pme_turn_off()

Message ID 20250315201548.858189-2-helgaas@kernel.org (mailing list archive)
State New
Delegated to: Krzysztof Wilczyński
Headers show
Series PCI: Use device bus range info to cleanup RC Host/EP pci_fixup_addr() | expand

Commit Message

Bjorn Helgaas March 15, 2025, 8:15 p.m. UTC 
From: Frank Li <Frank.Li@nxp.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@nxp.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

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;