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Message-Id: <20230530141304.1850195-1-schnelle@linux.ibm.com> Date: Tue, 30 May 2023 16:13:04 +0200 From: Niklas Schnelle <schnelle@...ux.ibm.com> To: Shay Drory <shayd@...dia.com>, Saeed Mahameed <saeedm@...dia.com>, Eli Cohen <elic@...dia.com>, Leon Romanovsky <leon@...nel.org>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com> Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org, linux-rdma@...r.kernel.org Subject: [PATCH net] net/mlx5: Fix setting of irq->map.index for static IRQ case When dynamic IRQ allocation is not supported all IRQs are allocated up front in mlx5_irq_table_create() instead of dynamically as part of mlx5_irq_alloc(). In the latter dynamic case irq->map.index is set via the mapping returned by pci_msix_alloc_irq_at(). In the static case and prior to commit 1da438c0ae02 ("net/mlx5: Fix indexing of mlx5_irq") irq->map.index was set in mlx4_irq_alloc() twice once initially to 0 and then to the requested index before storing in the xarray. After this commit it is only set to 0 which breaks all other IRQ mappins. Fix this by setting irq->map.index to the requested index together with irq->map.virq and improve the related comment to make it clearer which cases it deals with. Fixes: 1da438c0ae02 ("net/mlx5: Fix indexing of mlx5_irq") Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com> --- drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c index db5687d9fec9..fd5b43e8f3bb 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c @@ -232,12 +232,13 @@ struct mlx5_irq *mlx5_irq_alloc(struct mlx5_irq_pool *pool, int i, if (!irq) return ERR_PTR(-ENOMEM); if (!i || !pci_msix_can_alloc_dyn(dev->pdev)) { - /* The vector at index 0 was already allocated. - * Just get the irq number. If dynamic irq is not supported - * vectors have also been allocated. + /* The vector at index 0 is always statically allocated. If + * dynamic irq is not supported all vectors are statically + * allocated. In both cases just get the irq number and set + * the index. */ irq->map.virq = pci_irq_vector(dev->pdev, i); - irq->map.index = 0; + irq->map.index = i; } else { irq->map = pci_msix_alloc_irq_at(dev->pdev, MSI_ANY_INDEX, af_desc); if (!irq->map.virq) { -- 2.39.2
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