RDMA/hns: Add clear_hem return value to log

mainline inclusion
from mainline-v6.5-rc1
commit a519a612a71848b69b70b18b4d14d165b2d8aaf7
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I7R61Q
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a519a612a71848b69b70b18b4d14d165b2d8aaf7

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Log return value of clear_hem() to help diagnose.

Link: https://lore.kernel.org/r/20230523121641.3132102-4-huangjunxian6@hisilicon.comSigned-off-by: NChengchang Tang <tangchengchang@huawei.com>
Signed-off-by: NJunxian Huang <huangjunxian6@hisilicon.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: NJuan Zhou <zhoujuan51@h-partners.com>

drivers/infiniband/hw/hns/hns_roce_hem.c

@@ -619,6 +619,7 @@ static void clear_mhop_hem(struct hns_roce_dev *hr_dev,
 	u32 hop_num = mhop->hop_num;
 	u32 chunk_ba_num;
 	u32 step_idx;
+	int ret;
 
 	index->inited = HEM_INDEX_BUF;
 	chunk_ba_num = mhop->bt_chunk_size / BA_BYTE_LEN;
@@ -642,16 +643,24 @@ static void clear_mhop_hem(struct hns_roce_dev *hr_dev,
 		else
 			step_idx = hop_num;
 
-		if (hr_dev->hw->clear_hem(hr_dev, table, obj, step_idx))
-			ibdev_warn(ibdev, "failed to clear hop%u HEM.\n", hop_num);
+		ret = hr_dev->hw->clear_hem(hr_dev, table, obj, step_idx);
+		if (ret)
+			ibdev_warn(ibdev, "failed to clear hop%u HEM, ret = %d.\n",
+				   hop_num, ret);
 
-		if (index->inited & HEM_INDEX_L1)
-			if (hr_dev->hw->clear_hem(hr_dev, table, obj, 1))
-				ibdev_warn(ibdev, "failed to clear HEM step 1.\n");
+		if (index->inited & HEM_INDEX_L1) {
+			ret = hr_dev->hw->clear_hem(hr_dev, table, obj, 1);
+			if (ret)
+				ibdev_warn(ibdev, "failed to clear HEM step 1, ret = %d.\n",
+					   ret);
+		}
 
-		if (index->inited & HEM_INDEX_L0)
-			if (hr_dev->hw->clear_hem(hr_dev, table, obj, 0))
-				ibdev_warn(ibdev, "failed to clear HEM step 0.\n");
+		if (index->inited & HEM_INDEX_L0) {
+			ret = hr_dev->hw->clear_hem(hr_dev, table, obj, 0);
+			if (ret)
+				ibdev_warn(ibdev, "failed to clear HEM step 0, ret = %d.\n",
+					   ret);
+		}
 	}
 }
 
@@ -688,6 +697,7 @@ void hns_roce_table_put(struct hns_roce_dev *hr_dev,
 {
 	struct device *dev = hr_dev->dev;
 	unsigned long i;
+	int ret;
 
 	if (hns_roce_check_whether_mhop(hr_dev, table->type)) {
 		hns_roce_table_mhop_put(hr_dev, table, obj, 1);
@@ -700,8 +710,10 @@ void hns_roce_table_put(struct hns_roce_dev *hr_dev,
 					 &table->mutex))
 		return;
 
-	if (hr_dev->hw->clear_hem(hr_dev, table, obj, HEM_HOP_STEP_DIRECT))
-		dev_warn(dev, "failed to clear HEM base address.\n");
+	ret = hr_dev->hw->clear_hem(hr_dev, table, obj, HEM_HOP_STEP_DIRECT);
+	if (ret)
+		dev_warn(dev, "failed to clear HEM base address, ret = %d.\n",
+			 ret);
 
 	hns_roce_free_hem(hr_dev, table->hem[i]);
 	table->hem[i] = NULL;
@@ -917,6 +929,8 @@ void hns_roce_cleanup_hem_table(struct hns_roce_dev *hr_dev,
 {
 	struct device *dev = hr_dev->dev;
 	unsigned long i;
+	int obj;
+	int ret;
 
 	if (hns_roce_check_whether_mhop(hr_dev, table->type)) {
 		hns_roce_cleanup_mhop_hem_table(hr_dev, table);
@@ -925,9 +939,11 @@ void hns_roce_cleanup_hem_table(struct hns_roce_dev *hr_dev,
 
 	for (i = 0; i < table->num_hem; ++i)
 		if (table->hem[i]) {
-			if (hr_dev->hw->clear_hem(hr_dev, table,
-			    i * table->table_chunk_size / table->obj_size, 0))
-				dev_err(dev, "Clear HEM base address failed.\n");
+			obj = i * table->table_chunk_size / table->obj_size;
+			ret = hr_dev->hw->clear_hem(hr_dev, table, obj, 0);
+			if (ret)
+				dev_err(dev, "clear HEM base address failed, ret = %d.\n",
+					ret);
 
 			hns_roce_free_hem(hr_dev, table->hem[i]);
 		}