Re: [PATCH v9 06/12] ARM: integrator: Correct usage of of_pci_range_to_resource()

Bjorn Helgaas
2014-09-05T22:08:29Z

[+cc Linus]

On Tue, Aug 12, 2014 at 05:25:19PM +0100, Liviu Dudau wrote:
> Previously, of_pci_range_to_resource() would return a resource
> that contained physical addresses of the IO space even if the
> IORESOURCE_IO flags mandate a logical port set of values. Now
> that the function has been fixed we need to update the drivers
> that were taking advantage of the old behaviour.
>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Russell King <linux@arm.linux.org.uk>
> Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>

Something's wrong with the CC: list. You list Linus here in the changelog,
but I don't see him in the CC: headers.

> ---
> arch/arm/mach-integrator/pci_v3.c | 24 +++++++++++++-----------
> 1 file changed, 13 insertions(+), 11 deletions(-)
>
> diff --git a/arch/arm/mach-integrator/pci_v3.c b/arch/arm/mach-integrator/pci_v3.c
> index 05e1f73..193b7f8 100644
> --- a/arch/arm/mach-integrator/pci_v3.c
> +++ b/arch/arm/mach-integrator/pci_v3.c
> @@ -660,6 +660,7 @@ static void __init pci_v3_preinit(void)
> {
> unsigned long flags;
> unsigned int temp;
> + phys_addr_t io_address = pci_pio_to_address(io_mem.start);
>
> pcibios_min_mem = 0x00100000;
>
> @@ -701,7 +702,7 @@ static void __init pci_v3_preinit(void)
> /*
> * Setup window 2 - PCI IO
> */
> - v3_writel(V3_LB_BASE2, v3_addr_to_lb_base2(io_mem.start) |
> + v3_writel(V3_LB_BASE2, v3_addr_to_lb_base2(io_address) |
> V3_LB_BASE_ENABLE);
> v3_writew(V3_LB_MAP2, v3_addr_to_lb_map2(0));
>
> @@ -742,6 +743,7 @@ static void __init pci_v3_preinit(void)
> static void __init pci_v3_postinit(void)
> {
> unsigned int pci_cmd;
> + phys_addr_t io_address = pci_pio_to_address(io_mem.start);
>
> pci_cmd = PCI_COMMAND_MEMORY |
> PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE;
> @@ -758,7 +760,7 @@ static void __init pci_v3_postinit(void)
> "interrupt: %d\n", ret);
> #endif
>
> - register_isa_ports(non_mem.start, io_mem.start, 0);
> + register_isa_ports(non_mem.start, io_address, 0);
> }
>
> /*
> @@ -867,33 +869,33 @@ static int __init pci_v3_probe(struct platform_device *pdev)
>
> for_each_of_pci_range(&parser, &range) {
> if (!range.flags) {
> - of_pci_range_to_resource(&range, np, &conf_mem);
> + ret = of_pci_range_to_resource(&range, np, &conf_mem);
> conf_mem.name = "PCIv3 config";
> }
> if (range.flags & IORESOURCE_IO) {
> - of_pci_range_to_resource(&range, np, &io_mem);
> + ret = of_pci_range_to_resource(&range, np, &io_mem);
> + dev_info(&pdev->dev, "IO PCI range converted\n");
> io_mem.name = "PCIv3 I/O";
> }
> if ((range.flags & IORESOURCE_MEM) &&
> !(range.flags & IORESOURCE_PREFETCH)) {
> non_mem_pci = range.pci_addr;
> non_mem_pci_sz = range.size;
> - of_pci_range_to_resource(&range, np, &non_mem);
> + ret = of_pci_range_to_resource(&range, np, &non_mem);
> non_mem.name = "PCIv3 non-prefetched mem";
> }
> if ((range.flags & IORESOURCE_MEM) &&
> (range.flags & IORESOURCE_PREFETCH)) {
> pre_mem_pci = range.pci_addr;
> pre_mem_pci_sz = range.size;
> - of_pci_range_to_resource(&range, np, &pre_mem);
> + ret = of_pci_range_to_resource(&range, np, &pre_mem);
> pre_mem.name = "PCIv3 prefetched mem";
> }
> - }
>
> - if (!conf_mem.start || !io_mem.start ||
> - !non_mem.start || !pre_mem.start) {
> - dev_err(&pdev->dev, "missing ranges in device node\n");
> - return -EINVAL;
> + if (ret < 0) {
> + dev_err(&pdev->dev, "missing ranges in device node\n");
> + return -EINVAL;
> + }
> }
>
> pci_v3.map_irq = of_irq_parse_and_map_pci;
> --
> 2.0.4
>