linux-kernel - Re: [PATCH v3 13/14] net/mlx5: Use irq_set_affinity_and

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Date:   Wed, 14 Jul 2021 15:01:11 +0300
From:   Leon Romanovsky <leonro@...dia.com>
To:     Nitesh Narayan Lal <nitesh@...hat.com>
CC:     <linux-kernel@...r.kernel.org>, <linux-scsi@...r.kernel.org>,
        <intel-wired-lan@...ts.osuosl.org>, <netdev@...r.kernel.org>,
        <linux-api@...r.kernel.org>, <linux-pci@...r.kernel.org>,
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Subject: Re: [PATCH v3 13/14] net/mlx5: Use irq_set_affinity_and_hint

On Tue, Jul 13, 2021 at 05:15:01PM -0400, Nitesh Narayan Lal wrote:
> The driver uses irq_set_affinity_hint() to update the affinity_hint mask
> that is consumed by the userspace to distribute the interrupts and to apply
> the provided mask as the affinity for the mlx5 interrupts. However,
> irq_set_affinity_hint() applying the provided cpumask as an affinity for
> the interrupt is an undocumented side effect.
> 
> To remove this side effect irq_set_affinity_hint() has been marked
> as deprecated and new interfaces have been introduced. Hence, replace the
> irq_set_affinity_hint() with the new interface irq_set_affinity_and_hint()
> where the provided mask needs to be applied as the affinity and
> affinity_hint pointer needs to be set and replace with
> irq_update_affinity_hint() where only affinity_hint needs to be updated.
> 
> Signed-off-by: Nitesh Narayan Lal <nitesh@...hat.com>
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/pci_irq.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 

Thanks,
Reviewed-by: Leon Romanovsky <leonro@...dia.com>