net/mlx5: E-Switch, Fix an Oops in error handling code

stable inclusion
from stable-v5.10.177
commit 5eadc80328298ef7beaaf0cd96791667d3b485ca
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I88YNP

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=5eadc80328298ef7beaaf0cd96791667d3b485ca



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[ Upstream commit 640fcdbc ]

The error handling dereferences "vport".  There is nothing we can do if
it is an error pointer except returning the error code.

Fixes: 133dcfc5 ("net/mlx5: E-Switch, Alloc and free unique metadata for match")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>
(cherry picked from commit 4b18311f)