[PATCH][next] RDMA/hns: Fix uninitialized return value in ret

[PATCH][next] RDMA/hns: Fix uninitialized return value in ret

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

Currently if !r->hopnum is true in the for-loop and later on
mapped_cnt < page_cnt is false we end up with an uninitialized value
in ret being returned at the end of the function hns_roce_mtr_map.
Fix this by keeping the original intent and ensure ret is zero by
initializing ret at the start of the function.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: 9ea9a53ea93b ("RDMA/hns: Add mapped page count checking for MTR")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/infiniband/hw/hns/hns_roce_mr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c
index 79b3c3023fe7..b8454dcb0318 100644
--- a/drivers/infiniband/hw/hns/hns_roce_mr.c
+++ b/drivers/infiniband/hw/hns/hns_roce_mr.c
@@ -776,7 +776,7 @@ int hns_roce_mtr_map(struct hns_roce_dev *hr_dev, struct hns_roce_mtr *mtr,
 	struct ib_device *ibdev = &hr_dev->ib_dev;
 	struct hns_roce_buf_region *r;
 	unsigned int i, mapped_cnt;
-	int ret;
+	int ret = 0;
 
 	/*
 	 * Only use the first page address as root ba when hopnum is 0, this
-- 
2.30.0