[PATCH] net/xsc: fix uninitialized return value in QP modify

[Stephen Hemminger <stephen@networkplumber.org>]

If xsc_vfio_modify_qp_status() is called with num <= 0 the loop
is skipped and an uninitialized value is returned.
All current callers pass num = 1, but gcc 15 at -O1 cannot see
that through the dev_ops indirection and reports:

  xsc_vfio.c:491:16: error: 'ret' may be used uninitialized

Initialize ret to 0.

Bugzilla ID: 2099
Fixes: 31e84e37c0b9 ("net/xsc: support VFIO")
Cc: stable@dpdk.org

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/xsc/xsc_vfio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/xsc/xsc_vfio.c b/drivers/net/xsc/xsc_vfio.c
index 0a1e507f7d..bae891cfba 100644
--- a/drivers/net/xsc/xsc_vfio.c
+++ b/drivers/net/xsc/xsc_vfio.c
@@ -449,7 +449,7 @@ xsc_vfio_link_get(struct xsc_dev *xdev, struct rte_eth_link *link)
 static int
 xsc_vfio_modify_qp_status(struct xsc_dev *xdev, uint32_t qpn, int num, int opcode)
 {
-	int i, ret;
+	int i, ret = 0;
 	int in_len, out_len, cmd_len;
 	struct xsc_cmd_modify_qp_mbox_in *in;
 	struct xsc_cmd_modify_qp_mbox_out *out;
-- 
2.53.0