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    SubjectRe: Sparc: Kernel 2.6.13 to 2.6.15-rc2 bug when running X11
    From
    From: "J.O. Aho" <trizt@iname.com>
    Date: Sat, 10 Dec 2005 23:52:01 +0100 (CET)

    > IO[X:6761]:
    > remap_pfn_range(s[71800000]e[71c10000],f[71800000],pfn[1fc0060],sz[2000],prot[80000000000006b0])
    > IO[X:6761]:
    > remap_pfn_range(s[71800000]e[71c10000],f[71802000],pfn[1fc0060],sz[2000],prot[80000000000006b0])

    That's the problem, we're being called twice over the same
    area.

    Now we need to figure out why. Please add this patch and give
    us the new log output. I'm going to a hockey game so I won't
    be able to look at this until later this evening.

    Thanks.

    --- drivers/video/sbuslib.c.~1~ 2005-11-13 17:58:46.000000000 -0800
    +++ drivers/video/sbuslib.c 2005-12-10 15:00:25.000000000 -0800
    @@ -52,6 +52,10 @@

    off = vma->vm_pgoff << PAGE_SHIFT;

    +#if 1
    + printk("sbusfb_mmap: start[%lx] size[%lx] off[%lx]\n",
    + vma->vm_start, size, off);
    +#endif
    /* To stop the swapper from even considering these pages */
    vma->vm_flags |= (VM_IO | VM_RESERVED);

    @@ -69,12 +73,19 @@
    map_offset = (physbase + map[i].poff) & POFF_MASK;
    break;
    }
    +#if 1
    + printk("sbusfb_mmap: page[%x] map_size[%lx]\n",
    + page, map_size);
    +#endif
    if (!map_size){
    page += PAGE_SIZE;
    continue;
    }
    if (page + map_size > size)
    map_size = size - page;
    +#if 1
    + printk("sbusfb_mmap: map_size is now %lx\n", map_size);
    +#endif
    r = io_remap_pfn_range(vma,
    vma->vm_start + page,
    MK_IOSPACE_PFN(iospace,
    @@ -85,6 +96,9 @@
    return -EAGAIN;
    page += map_size;
    }
    +#if 1
    + printk("sbusfb_mmap: Done\n");
    +#endif

    return 0;
    }
    -
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