From: Joerg Roedel <joerg.roedel@amd.com>
Date: Fri, 12 Dec 2008 14:16:38 +0000 (+0100)
Subject: AMD IOMMU: add stats counter for free_coherent requests
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5d31ee7e08b7713596b999a42e67491bdf3665b3;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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 ecc89f8857b6..112412d733ab 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -70,6 +70,7 @@ DECLARE_STATS_COUNTER(cnt_unmap_single);
 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 @@ static void amd_iommu_stats_init(void)
 	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 @@ static void free_coherent(struct device *dev, size_t size,
 	struct protection_domain *domain;
 	u16 devid;
 
+	INC_STATS_COUNTER(cnt_free_coherent);
+
 	if (!check_device(dev))
 		return;