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authorHan, Weidong <weidong.han@intel.com>2009-04-04 17:21:26 +0800
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-04-04 10:41:32 +0100
commit34aaaa948e3c9dd65b27fa499c5c9e8d8f1227cf (patch)
treec6834b2bdc46032308f7bcb5cffa7205817841ea /arch/x86/kernel/apic/io_apic.c
parent161fde083f3403e7aa178dc944bf43c339e18491 (diff)
x86, dmar: check if it's initialized before disable queue invalidation
If queue invalidation is disabled after it's already initialized, dmar_enable_qi won't re-enable it due to iommu->qi is allocated. It may result in system hang when use queue invalidation. Add this check to avoid this case. Signed-off-by: Weidong Han <weidong.han@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'arch/x86/kernel/apic/io_apic.c')
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