[PATCH 5.4 074/259] RDMA/device: Return error earlier if port in not valid

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5.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Leon Romanovsky <leonro@xxxxxxxxxx>

[ Upstream commit 917918f57a7b139c043e78c502876f2c286f4f0a ]

There is no need to allocate port data if port provided is not valid.

Fixes: c2261dd76b54 ("RDMA/device: Add ib_device_set_netdev() as an alternative to get_netdev")
Link: https://lore.kernel.org/r/022047a8b16988fc88d4426da50bf60a4833311b.1719235449.git.leon@xxxxxxxxxx
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/infiniband/core/device.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index c7c3b9bae938c..c46d68e6ccd0e 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -2125,6 +2125,9 @@ int ib_device_set_netdev(struct ib_device *ib_dev, struct net_device *ndev,
 	unsigned long flags;
 	int ret;
 
+	if (!rdma_is_port_valid(ib_dev, port))
+		return -EINVAL;
+
 	/*
 	 * Drivers wish to call this before ib_register_driver, so we have to
 	 * setup the port data early.
@@ -2133,9 +2136,6 @@ int ib_device_set_netdev(struct ib_device *ib_dev, struct net_device *ndev,
 	if (ret)
 		return ret;
 
-	if (!rdma_is_port_valid(ib_dev, port))
-		return -EINVAL;
-
 	pdata = &ib_dev->port_data[port];
 	spin_lock_irqsave(&pdata->netdev_lock, flags);
 	old_ndev = rcu_dereference_protected(
-- 
2.43.0







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