linux-kernel - Re: [PATCH] xen: xen-pciback: remove DRIVER

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Date:   Wed, 19 Jul 2017 15:17:53 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Greg KH <gregkh@...uxfoundation.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:     xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] xen: xen-pciback: remove DRIVER_ATTR() usage

On 19/07/17 14:58, Greg KH wrote:
> From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 
> It's better to be explicit and use the DRIVER_ATTR_RW() and
> DRIVER_ATTR_RO() macros when defining a driver's sysfs file.
> 
> Bonus is this fixes up a checkpatch.pl warning.
> 
> This is part of a series to drop DRIVER_ATTR() from the tree entirely.
> 
> Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Cc: Juergen Gross <jgross@...e.com>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 
> ---
>  drivers/xen/xen-pciback/pci_stub.c |   44 ++++++++++++++++---------------------
>  1 file changed, 20 insertions(+), 24 deletions(-)
> 
> 
> --- a/drivers/xen/xen-pciback/pci_stub.c
> +++ b/drivers/xen/xen-pciback/pci_stub.c
> @@ -1172,8 +1172,8 @@ out:
>  	return err;
>  }
>  
> -static ssize_t pcistub_slot_add(struct device_driver *drv, const char *buf,
> -				size_t count)
> +static ssize_t new_slot_store(struct device_driver *drv, const char *buf,
> +			      size_t count)
>  {
>  	int domain, bus, slot, func;
>  	int err;
> @@ -1189,10 +1189,10 @@ out:
>  		err = count;
>  	return err;
>  }
> -static DRIVER_ATTR(new_slot, S_IWUSR, NULL, pcistub_slot_add);
> +static DRIVER_ATTR_WO(new_slot);
>  
> -static ssize_t pcistub_slot_remove(struct device_driver *drv, const char *buf,
> -				   size_t count)
> +static ssize_t remove_slot_store(struct device_driver *drv, const char *buf,
> +				 size_t count)
>  {
>  	int domain, bus, slot, func;
>  	int err;
> @@ -1208,9 +1208,9 @@ out:
>  		err = count;
>  	return err;
>  }
> -static DRIVER_ATTR(remove_slot, S_IWUSR, NULL, pcistub_slot_remove);
> +static DRIVER_ATTR_WO(remove_slot);
>  
> -static ssize_t pcistub_slot_show(struct device_driver *drv, char *buf)
> +static ssize_t slots_show(struct device_driver *drv, char *buf)
>  {
>  	struct pcistub_device_id *pci_dev_id;
>  	size_t count = 0;
> @@ -1231,9 +1231,9 @@ static ssize_t pcistub_slot_show(struct
>  
>  	return count;
>  }
> -static DRIVER_ATTR(slots, S_IRUSR, pcistub_slot_show, NULL);
> +static DRIVER_ATTR_RO(slots);
>  
> -static ssize_t pcistub_irq_handler_show(struct device_driver *drv, char *buf)
> +static ssize_t irq_handlers_show(struct device_driver *drv, char *buf)
>  {
>  	struct pcistub_device *psdev;
>  	struct xen_pcibk_dev_data *dev_data;
> @@ -1260,11 +1260,10 @@ static ssize_t pcistub_irq_handler_show(
>  	spin_unlock_irqrestore(&pcistub_devices_lock, flags);
>  	return count;
>  }
> -static DRIVER_ATTR(irq_handlers, S_IRUSR, pcistub_irq_handler_show, NULL);
> +static DRIVER_ATTR_RO(irq_handlers);
>  
> -static ssize_t pcistub_irq_handler_switch(struct device_driver *drv,
> -					  const char *buf,
> -					  size_t count)
> +static ssize_t irq_handler_state_store(struct device_driver *drv,
> +				       const char *buf, size_t count)
>  {
>  	struct pcistub_device *psdev;
>  	struct xen_pcibk_dev_data *dev_data;
> @@ -1301,11 +1300,10 @@ out:
>  		err = count;
>  	return err;
>  }
> -static DRIVER_ATTR(irq_handler_state, S_IWUSR, NULL,
> -		   pcistub_irq_handler_switch);
> +static DRIVER_ATTR_WO(irq_handler_state);
>  
> -static ssize_t pcistub_quirk_add(struct device_driver *drv, const char *buf,
> -				 size_t count)
> +static ssize_t quirks_add(struct device_driver *drv, const char *buf,
> +			  size_t count)

Shouldn't this be named quirks_store()?


Juergen