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Subject[PATCH 09 of 38] x86: make sure we really have an hpet mapping before using it
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When booting in Xen dom0, the hpet isn't really accessible, so make
sure the mapping is non-NULL before use.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
arch/x86/kernel/hpet.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -834,10 +834,11 @@

hpet_address = force_hpet_address;
hpet_enable();
- if (!hpet_virt_address)
- return -ENODEV;
}

+ if (!hpet_virt_address)
+ return -ENODEV;
+
hpet_reserve_platform_timers(hpet_readl(HPET_ID));

for_each_online_cpu(cpu) {



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