Commit c0702a4b authored Jan 12, 2020 by Erez Shitrit Committed by Saeed Mahameed Jan 24, 2020

net/mlx5: DR, use non preemptible call to get the current cpu number



Use raw_smp_processor_id instead of smp_processor_id() otherwise we will
get the following trace in debug-kernel:
	BUG: using smp_processor_id() in preemptible [00000000] code: devlink
	caller is dr_create_cq.constprop.2+0x31d/0x970 [mlx5_core]
	Call Trace:
	dump_stack+0x9a/0xf0
	debug_smp_processor_id+0x1f3/0x200
	dr_create_cq.constprop.2+0x31d/0x970
	genl_family_rcv_msg+0x5fd/0x1170
	genl_rcv_msg+0xb8/0x160
	netlink_rcv_skb+0x11e/0x340

Fixes: 297ccceb ("net/mlx5: DR, Expose an internal API to issue RDMA operations")
Signed-off-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

parent e401a184

drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c

+2 −1

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
		/* Copyright (c) 2019 Mellanox Technologies. */

		#include <linux/smp.h>
		#include "dr_types.h"

		#define QUEUE_SIZE 128
		@@ -729,7 +730,7 @@ static struct mlx5dr_cq dr_create_cq(struct mlx5_core_dev mdev,
		if (!in)
		goto err_cqwq;

		vector = smp_processor_id() % mlx5_comp_vectors_count(mdev);
		vector = raw_smp_processor_id() % mlx5_comp_vectors_count(mdev);
		err = mlx5_vector2eqn(mdev, vector, &eqn, &irqn);
		if (err) {
		kvfree(in);

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