linux-kernel - Re: [PATCH v4 02/10] driver core: add irq_get_affinity callback device

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Message-ID: <d441a856-3c81-4db2-a904-5167d26aaf53@flourine.local>
Date: Thu, 14 Nov 2024 08:06:39 +0100
From: Daniel Wagner <dwagner@...e.de>
To: Ming Lei <ming.lei@...hat.com>
Cc: Daniel Wagner <wagi@...nel.org>, Jens Axboe <axboe@...nel.dk>, 
	Bjorn Helgaas <bhelgaas@...gle.com>, "Michael S. Tsirkin" <mst@...hat.com>, 
	Jason Wang <jasowang@...hat.com>, Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, 
	Eugenio Pérez <eperezma@...hat.com>, "Martin K. Petersen" <martin.petersen@...cle.com>, 
	Keith Busch <kbusch@...nel.org>, Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>, 
	John Garry <john.g.garry@...cle.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Hannes Reinecke <hare@...e.de>, linux-block@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-pci@...r.kernel.org, virtualization@...ts.linux.dev, linux-scsi@...r.kernel.org, 
	megaraidlinux.pdl@...adcom.com, mpi3mr-linuxdrv.pdl@...adcom.com, 
	MPT-FusionLinux.pdl@...adcom.com, storagedev@...rochip.com, linux-nvme@...ts.infradead.org
Subject: Re: [PATCH v4 02/10] driver core: add irq_get_affinity callback
 device_driver

On Thu, Nov 14, 2024 at 09:52:55AM +0800, Ming Lei wrote:
> On Wed, Nov 13, 2024 at 03:26:16PM +0100, Daniel Wagner wrote:
> > Introducing a callback in struct device_driver so that a device driver
> > can hook up the getters directly. This approach avoids exposing random
> > getters in drivers.
> > 
> > Signed-off-by: Daniel Wagner <wagi@...nel.org>
> > ---
> >  include/linux/device/driver.h | 3 +++
> >  1 file changed, 3 insertions(+)
> > 
> > diff --git a/include/linux/device/driver.h b/include/linux/device/driver.h
> > index 5c04b8e3833b995f9fd4d65b8732b3dfce2eba7e..0d1aee423f6c076ae102bdd0536233c259947fac 100644
> > --- a/include/linux/device/driver.h
> > +++ b/include/linux/device/driver.h
> > @@ -74,6 +74,7 @@ enum probe_type {
> >   * @suspend:	Called to put the device to sleep mode. Usually to a
> >   *		low power state.
> >   * @resume:	Called to bring a device from sleep mode.
> > + * @irq_get_affinity:	Get IRQ affinity mask for the device.
> >   * @groups:	Default attributes that get created by the driver core
> >   *		automatically.
> >   * @dev_groups:	Additional attributes attached to device instance once
> > @@ -112,6 +113,8 @@ struct device_driver {
> >  	void (*shutdown) (struct device *dev);
> >  	int (*suspend) (struct device *dev, pm_message_t state);
> >  	int (*resume) (struct device *dev);
> > +	const struct cpumask *(*irq_get_affinity)(struct device *dev,
> > +			unsigned int irq_vec);
> >  	const struct attribute_group **groups;
> >  	const struct attribute_group **dev_groups;
> 
> The patch looks fine, but if you put 1, 2 and 5 into single patch,
> it will become much easier to review, anyway:

1 and 2 makes sense to merge. Christoph asked me to split 5 out 1 as it
mixed different things together

https://lore.kernel.org/linux-nvme/20241112044736.GA8883@lst.de/