Patch "mlx5: fix mlx5_get_vector_affinity to start from completion vector 0" has been added to the 4.15-stable tree

Patch "mlx5: fix mlx5_get_vector_affinity to start from completion vector 0" has been added to the 4.15-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    mlx5: fix mlx5_get_vector_affinity to start from completion vector 0

to the 4.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mlx5-fix-mlx5_get_vector_affinity-to-start-from-completion-vector-0.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 2572cf57d75a7f91835d9a38771e9e76d575d122 Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Mon, 5 Feb 2018 16:24:52 +0200
Subject: mlx5: fix mlx5_get_vector_affinity to start from completion vector 0

From: Sagi Grimberg <sagi@grimberg.me>

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 <logang@deltatee.com>
Tested-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Cc: <stable@vger.kernel.org> # v4.15
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 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;
 


Patches currently in stable-queue which might be from sagi@grimberg.me are

queue-4.15/mlx5-fix-mlx5_get_vector_affinity-to-start-from-completion-vector-0.patch