linux-kernel - Re: [PATCH v3 4/9] driver core: Move true expression out of if condition in API driver_find

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Message-ID: <20241216151845.000074b1@huawei.com>
Date: Mon, 16 Dec 2024 15:18:45 +0000
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Zijun Hu <zijun_hu@...oud.com>
CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki"
	<rafael@...nel.org>, Tejun Heo <tj@...nel.org>, Josef Bacik
	<josef@...icpanda.com>, Jens Axboe <axboe@...nel.dk>, Boris Burkov
	<boris@....io>, Davidlohr Bueso <dave@...olabs.net>, Dave Jiang
	<dave.jiang@...el.com>, Alison Schofield <alison.schofield@...el.com>, Vishal
 Verma <vishal.l.verma@...el.com>, Ira Weiny <ira.weiny@...el.com>, Dan
 Williams <dan.j.williams@...el.com>, <linux-kernel@...r.kernel.org>,
	<cgroups@...r.kernel.org>, <linux-block@...r.kernel.org>,
	<linux-cxl@...r.kernel.org>, Zijun Hu <quic_zijuhu@...cinc.com>
Subject: Re: [PATCH v3 4/9] driver core: Move true expression out of if
 condition in API driver_find_device()

On Thu, 12 Dec 2024 21:38:40 +0800
Zijun Hu <zijun_hu@...oud.com> wrote:

> From: Zijun Hu <quic_zijuhu@...cinc.com>
> 
> For driver_find_device(), get_device() in the if condition always returns
> true, move it to if body to make the API's logic more clearer.
> 
> Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

Though I think it would have been fine to have all these similar patches
as a single patch.

> ---
>  drivers/base/driver.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/base/driver.c b/drivers/base/driver.c
> index b4eb5b89c4ee7bc35458fc75730b16a6d1e804d3..6f033a741aa7ce6138d1c61e49e72b2a3eb85e06 100644
> --- a/drivers/base/driver.c
> +++ b/drivers/base/driver.c
> @@ -160,9 +160,12 @@ struct device *driver_find_device(const struct device_driver *drv,
>  
>  	klist_iter_init_node(&drv->p->klist_devices, &i,
>  			     (start ? &start->p->knode_driver : NULL));
> -	while ((dev = next_device(&i)))
> -		if (match(dev, data) && get_device(dev))
> +	while ((dev = next_device(&i))) {
> +		if (match(dev, data)) {
> +			get_device(dev);
>  			break;
> +		}
> +	}
>  	klist_iter_exit(&i);
>  	return dev;
>  }
>