On Tue, Nov 24, 2015 at 11:36:52AM +0200, Stanimir Varbanov wrote:
> The io_base is used to keep the cpu physical address parsed
> from ranges dt property. After issue pci_remap_iospace the
> io_base has been assigned with io->start, which is not correct
> cause io->start is a PCI bus address.
>
> Fixes: 0021d22b73d6 ("PCI: designware: Use of_pci_get_host_bridge_resources() to parse DT")
> Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@xxxxxxxxxx>
> ---
> drivers/pci/host/pcie-designware.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
> index 540f077c37ea..02a7452bdf23 100644
> --- a/drivers/pci/host/pcie-designware.c
> +++ b/drivers/pci/host/pcie-designware.c
> @@ -440,7 +440,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
> ret, pp->io);
> continue;
> }
> - pp->io_base = pp->io->start;
> break;
> case IORESOURCE_MEM:
> pp->mem = win->res;
Applied to for-linus for v4.4 with changelog as follows, thanks!
commit 5228e39e3f709c82e6c4643402fc25de54391e32
Author: Stanimir Varbanov <stanimir.varbanov@xxxxxxxxxx>
Date: Tue Nov 24 11:36:52 2015 +0200
PCI: designware: Remove incorrect io_base assignment
"pp->io" is an I/O resource, e.g., "[io 0x0000-0xffff]"; "pp->io_base" is
the CPU physical address of a region where the host bridge converts CPU
memory accesses into PCI I/O transactions.
Corrupting pp->io_base by assigning pp->io->start to it breaks access to
the PCI I/O space, as reported by Kishon.
Remove the invalid assignment.
[bhelgaas: changelog]
Fixes: 0021d22b73d6 ("PCI: designware: Use of_pci_get_host_bridge_resources() to parse DT")
Reported-and-tested-by: Kishon Vijay Abraham I <kishon@xxxxxx>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index 540f077..02a7452 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -440,7 +440,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
ret, pp->io);
continue;
}
- pp->io_base = pp->io->start;
break;
case IORESOURCE_MEM:
pp->mem = win->res;
--
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