diff mbox series

[V2,for-next,4/4] RDMA/hns: Remove jiffies operation in disable interrupt context

Message ID 1558683083-79692-5-git-send-email-oulijun@huawei.com (mailing list archive)
State Mainlined
Commit 669cefb654cb69b280e31380f5fc7e3b5755b0cd
Delegated to: Jason Gunthorpe
Headers show
Series Fixes for hns | expand

Commit Message

Lijun Ou May 24, 2019, 7:31 a.m. UTC 
From: Lang Cheng <chenglang@huawei.com>

In some functions, the jiffies operation is unnecessary, and we
can control delay using mdelay and udelay functions only.
Especially, in hns_roce_v1_clear_hem, the function calls
spin_lock_irqsave, the context disables interrupt, so we
can not use jiffies and msleep functions.

Signed-off-by: Lang Cheng <chenglang@huawei.com>
---
V1->V2:
1. Rewrite the commit information according to Leon Romanovsky's
reviews
---
 drivers/infiniband/hw/hns/hns_roce_hem.c   | 21 +++++++++++----------
 drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 19 ++++++++++---------
 2 files changed, 21 insertions(+), 19 deletions(-)
diff mbox series

Patch

diff --git a/drivers/infiniband/hw/hns/hns_roce_hem.c b/drivers/infiniband/hw/hns/hns_roce_hem.c
index 8e29dbb..d0eacd8 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hem.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hem.c
@@ -376,18 +376,19 @@  static int hns_roce_set_hem(struct hns_roce_dev *hr_dev,
 
 		bt_cmd = hr_dev->reg_base + ROCEE_BT_CMD_H_REG;
 
-		end = msecs_to_jiffies(HW_SYNC_TIMEOUT_MSECS) + jiffies;
-		while (1) {
-			if (readl(bt_cmd) >> BT_CMD_SYNC_SHIFT) {
-				if (!(time_before(jiffies, end))) {
-					dev_err(dev, "Write bt_cmd err,hw_sync is not zero.\n");
-					spin_unlock_irqrestore(lock, flags);
-					return -EBUSY;
-				}
-			} else {
+		end = HW_SYNC_TIMEOUT_MSECS;
+		while (end) {
+			if (!readl(bt_cmd) >> BT_CMD_SYNC_SHIFT)
 				break;
-			}
+
 			mdelay(HW_SYNC_SLEEP_TIME_INTERVAL);
+			end -= HW_SYNC_SLEEP_TIME_INTERVAL;
+		}
+
+		if (end <= 0) {
+			dev_err(dev, "Write bt_cmd err,hw_sync is not zero.\n");
+			spin_unlock_irqrestore(lock, flags);
+			return -EBUSY;
 		}
 
 		bt_cmd_l = (u32)bt_ba;
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
index c35a4de..8b3169a 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
@@ -965,8 +965,7 @@  static int hns_roce_v1_recreate_lp_qp(struct hns_roce_dev *hr_dev)
 	struct hns_roce_free_mr *free_mr;
 	struct hns_roce_v1_priv *priv;
 	struct completion comp;
-	unsigned long end =
-	  msecs_to_jiffies(HNS_ROCE_V1_RECREATE_LP_QP_TIMEOUT_MSECS) + jiffies;
+	unsigned long end = HNS_ROCE_V1_RECREATE_LP_QP_TIMEOUT_MSECS;
 
 	priv = (struct hns_roce_v1_priv *)hr_dev->priv;
 	free_mr = &priv->free_mr;
@@ -986,10 +985,11 @@  static int hns_roce_v1_recreate_lp_qp(struct hns_roce_dev *hr_dev)
 
 	queue_work(free_mr->free_mr_wq, &(lp_qp_work->work));
 
-	while (time_before_eq(jiffies, end)) {
+	while (end) {
 		if (try_wait_for_completion(&comp))
 			return 0;
 		msleep(HNS_ROCE_V1_RECREATE_LP_QP_WAIT_VALUE);
+		end -= HNS_ROCE_V1_RECREATE_LP_QP_WAIT_VALUE;
 	}
 
 	lp_qp_work->comp_flag = 0;
@@ -1103,8 +1103,7 @@  static int hns_roce_v1_dereg_mr(struct hns_roce_dev *hr_dev,
 	struct hns_roce_free_mr *free_mr;
 	struct hns_roce_v1_priv *priv;
 	struct completion comp;
-	unsigned long end =
-		msecs_to_jiffies(HNS_ROCE_V1_FREE_MR_TIMEOUT_MSECS) + jiffies;
+	unsigned long end = HNS_ROCE_V1_FREE_MR_TIMEOUT_MSECS ;
 	unsigned long start = jiffies;
 	int npages;
 	int ret = 0;
@@ -1134,10 +1133,11 @@  static int hns_roce_v1_dereg_mr(struct hns_roce_dev *hr_dev,
 
 	queue_work(free_mr->free_mr_wq, &(mr_work->work));
 
-	while (time_before_eq(jiffies, end)) {
+	while (end) {
 		if (try_wait_for_completion(&comp))
 			goto free_mr;
 		msleep(HNS_ROCE_V1_FREE_MR_WAIT_VALUE);
+		end -= HNS_ROCE_V1_FREE_MR_WAIT_VALUE;
 	}
 
 	mr_work->comp_flag = 0;
@@ -2462,10 +2462,10 @@  static int hns_roce_v1_clear_hem(struct hns_roce_dev *hr_dev,
 
 	bt_cmd = hr_dev->reg_base + ROCEE_BT_CMD_H_REG;
 
-	end = msecs_to_jiffies(HW_SYNC_TIMEOUT_MSECS) + jiffies;
+	end = HW_SYNC_TIMEOUT_MSECS;
 	while (1) {
 		if (readl(bt_cmd) >> BT_CMD_SYNC_SHIFT) {
-			if (!(time_before(jiffies, end))) {
+			if (end < 0) {
 				dev_err(dev, "Write bt_cmd err,hw_sync is not zero.\n");
 				spin_unlock_irqrestore(&hr_dev->bt_cmd_lock,
 					flags);
@@ -2474,7 +2474,8 @@  static int hns_roce_v1_clear_hem(struct hns_roce_dev *hr_dev,
 		} else {
 			break;
 		}
-		msleep(HW_SYNC_SLEEP_TIME_INTERVAL);
+		mdelay(HW_SYNC_SLEEP_TIME_INTERVAL);
+		end -= HW_SYNC_SLEEP_TIME_INTERVAL;
 	}
 
 	bt_cmd_val[0] = (__le32)bt_ba;