net/mlx5: Fix race for multiple RoCE enable

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[ Upstream commit 734dc065fc ]

There are two potential problems with the existing implementation.

1. Enable and disable can race after the atomic operations.
2. If a command fails the refcount is left in an inconsistent state.

Introduce a lock and perform error checking.

Fixes: a6f7d2aff6 ("net/mlx5: Add support for multiple RoCE enable")
Signed-off-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Daniel Jurgens 2018-01-04 17:25:31 +02:00 • committed by Greg Kroah-Hartman

parent 46d19334ca

commit 35a9ebd920

2 changed files with 28 additions and 7 deletions

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33

drivers/net/ethernet/mellanox/mlx5/core/vport.c

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2

include/linux/mlx5/driver.h

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