diff options
Diffstat (limited to 'arch/i386/pci/pcbios.c')
| -rw-r--r-- | arch/i386/pci/pcbios.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/arch/i386/pci/pcbios.c b/arch/i386/pci/pcbios.c index ed1512a175ab..5f5193401bea 100644 --- a/arch/i386/pci/pcbios.c +++ b/arch/i386/pci/pcbios.c @@ -5,6 +5,7 @@ #include <linux/pci.h> #include <linux/init.h> #include <linux/module.h> +#include <linux/uaccess.h> #include "pci.h" #include "pci-functions.h" @@ -314,6 +315,10 @@ static struct pci_raw_ops * __devinit pci_find_bios(void) for (check = (union bios32 *) __va(0xe0000); check <= (union bios32 *) __va(0xffff0); ++check) { + long sig; + if (probe_kernel_address(&check->fields.signature, sig)) + continue; + if (check->fields.signature != BIOS32_SIGNATURE) continue; length = check->fields.length * 16; @@ -331,11 +336,13 @@ static struct pci_raw_ops * __devinit pci_find_bios(void) } DBG("PCI: BIOS32 Service Directory structure at 0x%p\n", check); if (check->fields.entry >= 0x100000) { - printk("PCI: BIOS32 entry (0x%p) in high memory, cannot use.\n", check); + printk("PCI: BIOS32 entry (0x%p) in high memory, " + "cannot use.\n", check); return NULL; } else { unsigned long bios32_entry = check->fields.entry; - DBG("PCI: BIOS32 Service Directory entry at 0x%lx\n", bios32_entry); + DBG("PCI: BIOS32 Service Directory entry at 0x%lx\n", + bios32_entry); bios32_indirect.address = bios32_entry + PAGE_OFFSET; if (check_pcibios()) return &pci_bios_access; |