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| author | Keir Fraser <keir@xen.org> | 2011-04-26 14:12:26 +0100 |
|---|---|---|
| committer | Keir Fraser <keir@xen.org> | 2011-04-26 14:12:26 +0100 |
| commit | b2fa72f6e75d5188120244a7cc3d42362d2a7d57 (patch) | |
| tree | 7e423be3d68770e46fe04d1ef0a0ae27bae169c1 | |
| parent | a6a3bf803986847f8a1161fcd72200dfb5d6fd81 (diff) | |
| download | xen-b2fa72f6e75d5188120244a7cc3d42362d2a7d57.tar.gz xen-b2fa72f6e75d5188120244a7cc3d42362d2a7d57.tar.bz2 xen-b2fa72f6e75d5188120244a7cc3d42362d2a7d57.zip | |
x86: Bail from hpet_disable_legacy_broadcast() if legacy_hpet_event is uninitialised.
Signed-off-by: Keir Fraser <keir@xen.org>
xen-4.1-testing changeset: 23034:7c7ef1b6f4e5
xen-4.1-testing date: Tue Apr 26 14:11:18 2011 +0100
| -rw-r--r-- | xen/arch/x86/hpet.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/xen/arch/x86/hpet.c b/xen/arch/x86/hpet.c index c47b527035..99213f5da5 100644 --- a/xen/arch/x86/hpet.c +++ b/xen/arch/x86/hpet.c @@ -624,6 +624,9 @@ void hpet_disable_legacy_broadcast(void) u32 cfg; unsigned long flags; + if ( !legacy_hpet_event.shift ) + return; + spin_lock_irqsave(&legacy_hpet_event.lock, flags); legacy_hpet_event.flags |= HPET_EVT_DISABLE; |