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| author |   Han, Weidong <weidong.han@intel.com> | 2009-04-04 17:21:26 +0800 |
|---|---|---|
| committer |   David Woodhouse <David.Woodhouse@intel.com> | 2009-04-04 10:41:32 +0100 |
| commit | 34aaaa948e3c9dd65b27fa499c5c9e8d8f1227cf (patch) | |
| tree | c6834b2bdc46032308f7bcb5cffa7205817841ea /kernel/trace/trace_power.c | |
| parent | intel-iommu: set compatibility format interrupt (diff) | |
| download | wireguard-linux-34aaaa948e3c9dd65b27fa499c5c9e8d8f1227cf.tar.xz wireguard-linux-34aaaa948e3c9dd65b27fa499c5c9e8d8f1227cf.zip | |
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 'kernel/trace/trace_power.c')
0 files changed, 0 insertions, 0 deletions