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| author | H. Peter Anvin <hpa@linux.intel.com> | 2009-02-23 14:05:56 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2009-02-23 14:05:56 -0800 |
| commit | dc731ca60954310be0993e8992d450c7089fd13d (patch) | |
| tree | 6a997916f963d9e6dfa76fc5564296f57c3f909e /arch/powerpc/kernel/pci-common.c | |
| parent | ec5b3d32437571b8a742069a4cfd04edb6b6eda5 (diff) | |
| parent | 20f4d6c3a2a23c5d7d9cc7f42fbb943ca7a03d1f (diff) | |
| download | kernel-crypto-dc731ca60954310be0993e8992d450c7089fd13d.tar.gz kernel-crypto-dc731ca60954310be0993e8992d450c7089fd13d.tar.xz kernel-crypto-dc731ca60954310be0993e8992d450c7089fd13d.zip | |
Merge branch 'x86/urgent' into x86/mce2
Diffstat (limited to 'arch/powerpc/kernel/pci-common.c')
| -rw-r--r-- | arch/powerpc/kernel/pci-common.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 19b12d2cbb4..0f418127231 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -561,8 +561,21 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus, (unsigned long long)(offset + size - 1)); if (mmap_state == pci_mmap_mem) { - if ((offset + size) > hose->isa_mem_size) - return -ENXIO; + /* Hack alert ! + * + * Because X is lame and can fail starting if it gets an error trying + * to mmap legacy_mem (instead of just moving on without legacy memory + * access) we fake it here by giving it anonymous memory, effectively + * behaving just like /dev/zero + */ + if ((offset + size) > hose->isa_mem_size) { + printk(KERN_DEBUG + "Process %s (pid:%d) mapped non-existing PCI legacy memory for 0%04x:%02x\n", + current->comm, current->pid, pci_domain_nr(bus), bus->number); + if (vma->vm_flags & VM_SHARED) + return shmem_zero_setup(vma); + return 0; + } offset += hose->isa_mem_phys; } else { unsigned long io_offset = (unsigned long)hose->io_base_virt - _IO_BASE; |