diff options
Diffstat (limited to 'arch/x86/kernel/amd_iommu.c')
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index ef377865eb7..71646c81421 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -66,6 +66,7 @@ static struct dma_ops_domain *find_protection_domain(u16 devid); DECLARE_STATS_COUNTER(compl_wait); DECLARE_STATS_COUNTER(cnt_map_single); +DECLARE_STATS_COUNTER(cnt_unmap_single); static struct dentry *stats_dir; static struct dentry *de_isolate; @@ -94,6 +95,7 @@ static void amd_iommu_stats_init(void) amd_iommu_stats_add(&compl_wait); amd_iommu_stats_add(&cnt_map_single); + amd_iommu_stats_add(&cnt_unmap_single); } #endif @@ -1321,6 +1323,8 @@ static void unmap_single(struct device *dev, dma_addr_t dma_addr, struct protection_domain *domain; u16 devid; + INC_STATS_COUNTER(cnt_unmap_single); + if (!check_device(dev) || !get_device_resources(dev, &iommu, &domain, &devid)) /* device not handled by any AMD IOMMU */ |