1 files changed, 6 insertions, 0 deletions

diff --git a/arch/x86/kernel/reboot_fixups_32.c b/arch/x86/kernel/reboot_fixups_32.c
index 03e1cce58f49..139eb03490f5 100644
--- a/arch/x86/kernel/reboot_fixups_32.c
+++ b/arch/x86/kernel/reboot_fixups_32.c
@@ -11,6 +11,7 @@
 
 #include <asm/delay.h>
 #include <linux/pci.h>
+#include <linux/interrupt.h>
 #include <asm/reboot_fixups.h>
 #include <asm/msr.h>
 
@@ -56,6 +57,11 @@ void mach_reboot_fixups(void)
         struct pci_dev *dev;
         int i;
 
+        /* we can be called from sysrq-B code. In such a case it is
+         * prohibited to dig PCI */
+        if (in_interrupt())
+                return;
+
         for (i=0; i < ARRAY_SIZE(fixups_table); i++) {
                 cur = &(fixups_table[i]);
                 dev = pci_get_device(cur->vendor, cur->device, NULL);