linux-kernel - Re: [PATCH net] driver core: auxiliary bus: Fix sysfs creation on bind

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Message-ID: <2025102347-fridge-happier-ea97@gregkh>
Date: Thu, 23 Oct 2025 08:46:16 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Tariq Toukan <tariqt@...dia.com>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>,
	Danilo Krummrich <dakr@...nel.org>, linux-kernel@...r.kernel.org,
	Mark Bloch <mbloch@...dia.com>, Gal Pressman <gal@...dia.com>,
	Aya Levin <ayal@...dia.com>, Saeed Mahameed <saeedm@...dia.com>,
	Leon Romanovsky <leon@...nel.org>, Simon Horman <horms@...nel.org>,
	Shay Drory <shayd@...dia.com>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>,
	Parav Pandit <parav@...dia.com>, Amir Tzin <amirtz@...dia.com>
Subject: Re: [PATCH net] driver core: auxiliary bus: Fix sysfs creation on
 bind

On Thu, Oct 23, 2025 at 09:19:27AM +0300, Tariq Toukan wrote:
> From: Amir Tzin <amirtz@...dia.com>
> 
> In case an auxiliary device with IRQs directory is unbinded, the
> directory is released, but auxdev->sysfs.irq_dir_exists remains true.
> This leads to a failure recreating the directory on bind [1].
> 
> Using the attributes group visibility interface, expose the IRQs
> attributes group if"f the xarray storing IRQs entries is not empty. Now
> irq_dir_exists field is redundant and can be removed.
> 
> [1]
> [] mlx5_core.sf mlx5_core.sf.2: mlx5_irq_affinity_request:167:(pid 1939):
>    Failed to create sysfs entry for irq 56, ret = -2
> [] mlx5_core.sf mlx5_core.sf.2: mlx5_eq_table_create:1195:(pid 1939):
>    Failed to create async EQs
> [] mlx5_core.sf mlx5_core.sf.2: mlx5_load:1362:(pid 1939):
>    Failed to create EQs
> 
> Fixes: a808878308a8 ("driver core: auxiliary bus: show auxiliary device IRQs")
> Signed-off-by: Amir Tzin <amirtz@...dia.com>
> Reviewed-by: Mark Bloch <mbloch@...dia.com>
> Signed-off-by: Tariq Toukan <tariqt@...dia.com>
> ---
>  drivers/base/auxiliary.c       |  13 +++-
>  drivers/base/auxiliary_sysfs.c | 117 +++++++++++++++++++++++++--------
>  include/linux/auxiliary_bus.h  |  26 ++++++--
>  3 files changed, 118 insertions(+), 38 deletions(-)
> 
> diff --git a/drivers/base/auxiliary.c b/drivers/base/auxiliary.c
> index 04bdbff4dbe5..b0fb31279257 100644
> --- a/drivers/base/auxiliary.c
> +++ b/drivers/base/auxiliary.c
> @@ -225,7 +225,16 @@ static int auxiliary_bus_probe(struct device *dev)
>  		return ret;
>  	}
>  
> -	return auxdrv->probe(auxdev, auxiliary_match_id(auxdrv->id_table, auxdev));
> +	ret = auxiliary_bus_irq_dir_res_probe(auxdev);
> +	if  (ret)
> +		return ret;

Please always use scripts/checkpatch.pl so that you don't get grumpy
maintainers asking you why you didn't use scripts/checkpatch.pl...

thanks!

greg k-h