[Xen-devel] [PATCH] x86, hpet: check hpet existence

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Subject:	[Xen-devel] [PATCH] x86, hpet: check hpet existence
From:	"Tian, Kevin" <kevin.tian@xxxxxxxxx>
Date:	Thu, 27 Nov 2008 14:34:36 +0800
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Thread-topic:	[PATCH] x86, hpet: check hpet existence

Add check on hpet existence which is removed accidentally
in previous changeset (18790). Or else BAD PERIOD error can be seen.

Signed-off-by Kevin Tian <kevin.tian@xxxxxxxxx>

diff -r ab0c1bdede53 xen/arch/x86/hpet.c
--- a/xen/arch/x86/hpet.c       Wed Nov 26 11:14:26 2008 +0000
+++ b/xen/arch/x86/hpet.c       Wed Nov 26 19:22:03 2008 -0500
@@ -273,6 +273,8 @@
         return hpet_rate;
     system_reset_latch = system_reset_counter;
 
+    if ( !hpet_address )
+        return 0;
     set_fixmap_nocache(FIX_HPET_BASE, hpet_address);
 
     hpet_id = hpet_read32(HPET_ID);

check_hpet.patch
Description: check_hpet.patch

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[Xen-devel] [PATCH] x86, hpet: check hpet existence