AMD IOMMU: add stats counter for free_coherent requests
Impact: see number of free_coherent requests in debugfs
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index ecc89f8..112412d 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -70,6 +70,7 @@
DECLARE_STATS_COUNTER(cnt_map_sg);
DECLARE_STATS_COUNTER(cnt_unmap_sg);
DECLARE_STATS_COUNTER(cnt_alloc_coherent);
+DECLARE_STATS_COUNTER(cnt_free_coherent);
static struct dentry *stats_dir;
static struct dentry *de_isolate;
@@ -102,6 +103,7 @@
amd_iommu_stats_add(&cnt_map_sg);
amd_iommu_stats_add(&cnt_unmap_sg);
amd_iommu_stats_add(&cnt_alloc_coherent);
+ amd_iommu_stats_add(&cnt_free_coherent);
}
#endif
@@ -1541,6 +1543,8 @@
struct protection_domain *domain;
u16 devid;
+ INC_STATS_COUNTER(cnt_free_coherent);
+
if (!check_device(dev))
return;