RDMA/mlx5: Fix mutex unlocking on error flow for steering anchor creation

The mutex was not unlocked on some of the error flows.
Moved the unlock location to include all the error flow scenarios.

Fixes: e1f4a52 ("RDMA/mlx5: Create an indirect flow table for steering anchor")
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Hamdan Igbaria <hamdani@nvidia.com>
Link: https://lore.kernel.org/r/1244a69d783da997c0af0b827c622eb00495492e.1695203958.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

Orabug: 36385281

(cherry picked from commit 2fad8f0)
cherry-pick-repo=kernel/git/torvalds/linux.git
unmodified-from-upstream: 2fad8f0

Signed-off-by: Mikhael Goikhman <migo@nvidia.com>
Signed-off-by: Qing Huang <qing.huang@oracle.com>
Reviewed-by: Devesh Sharma <devesh.s.sharma@oracle.com>
Signed-off-by: Brian Maly <brian.maly@oracle.com>

Author: hamdanigbaria

drivers/infiniband/hw/mlx5/fs.c

@@ -2530,8 +2530,8 @@ static int UVERBS_HANDLER(MLX5_IB_METHOD_STEERING_ANCHOR_CREATE)(
 	mlx5_steering_anchor_destroy_res(ft_prio);
 put_flow_table:
 	put_flow_table(dev, ft_prio, true);
-	mutex_unlock(&dev->flow_db->lock);
 free_obj:
+	mutex_unlock(&dev->flow_db->lock);
 	kfree(obj);
 
 	return err;