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

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

From: Sagi Grimberg <[email protected]>

commit 2572cf57d75a7f91835d9a38771e9e76d575d122 upstream.

The consumers of this routine expects the affinity map of of vector
index relative to the first completion vector. The upper layers are
not aware of internal/private completion vectors that mlx5 allocates
for its own usage.

Hence, return the affinity map of vector index relative to the first
completion vector.

Fixes: 05e0cc84e00c ("net/mlx5: Fix get vector affinity helper function")
Reported-by: Logan Gunthorpe <[email protected]>
Tested-by: Max Gurtovoy <[email protected]>
Reviewed-by: Max Gurtovoy <[email protected]>
Cc: <[email protected]> # v4.15
Signed-off-by: Sagi Grimberg <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 include/linux/mlx5/driver.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -1238,7 +1238,7 @@ mlx5_get_vector_affinity(struct mlx5_cor
        int eqn;
        int err;
 
-       err = mlx5_vector2eqn(dev, vector, &eqn, &irq);
+       err = mlx5_vector2eqn(dev, MLX5_EQ_VEC_COMP_BASE + vector, &eqn, &irq);
        if (err)
                return NULL;
 


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