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-rw-r--r--arch/powerpc/kernel/pci-common.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index da5a3855a0c4..0f4181272311 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -16,8 +16,6 @@
* 2 of the License, or (at your option) any later version.
*/
-#define DEBUG
-
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/string.h>
@@ -258,7 +256,8 @@ int pci_read_irq_line(struct pci_dev *pci_dev)
} else {
pr_debug(" Got one, spec %d cells (0x%08x 0x%08x...) on %s\n",
oirq.size, oirq.specifier[0], oirq.specifier[1],
- oirq.controller->full_name);
+ oirq.controller ? oirq.controller->full_name :
+ "<default>");
virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
oirq.size);
@@ -562,8 +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;
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