# HG changeset patch
# User yamahata@xxxxxxxxxxxxx
# Node ID 4e5c513b77a2930655a40f33f81b5ee4e5ec7ba5
# Parent  53143620c0fd95db98126ea3c8a30c0470439420
panic when ioremap hypercall fails. This can occur when dom0 vp model
xenlinux is used on P=M model xen/ia64.

PATCHNAME: panic_when_ioremap_hypercall_failed

diff -r 53143620c0fd -r 4e5c513b77a2 linux-2.6-xen-sparse/include/asm-ia64/hypercall.h
--- a/linux-2.6-xen-sparse/include/asm-ia64/hypercall.h	Tue May 16 19:06:46 2006 +0900
+++ b/linux-2.6-xen-sparse/include/asm-ia64/hypercall.h	Wed May 17 13:10:58 2006 +0900
@@ -318,6 +318,7 @@ static inline void exit_idle(void) {}
 #define do_IRQ(irq, regs) __do_IRQ((irq), (regs))
 
 #ifdef CONFIG_XEN_IA64_DOM0_VP
+#include <linux/err.h>
 #include <asm/xen/privop.h>
 
 #define _hypercall_imm1(type, name, imm, a1)			\
@@ -419,6 +420,10 @@ HYPERVISOR_ioremap(unsigned long ioaddr,
 	unsigned long ret = ioaddr;
 	if (running_on_xen) {
 		ret = __HYPERVISOR_ioremap(ioaddr, size);
+		if (IS_ERR_VALUE(ret))
+			panic("hypercall %s failed with %ld. "
+			      "Please check Xen and Linux config mismatch\n",
+			      __func__, -ret);
 	}
 	return ret;
 }