linux-kernel - Re: [PATCH] drm/nouveau/i2c: do not use assignment in if condition

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Date:   Thu, 13 Jul 2023 11:08:48 +0200
From:   Karol Herbst <kherbst@...hat.com>
To:     sunran001@...suo.com
Cc:     airlied@...il.com, daniel@...ll.ch, nouveau@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm/nouveau/i2c: do not use assignment in if condition

Reviewed-by: Karol Herbst <kherbst@...hat.com>

On Mon, Jul 10, 2023 at 9:23 AM <sunran001@...suo.com> wrote:
>
> Assignments in if condition are less readable and error-prone.  Fixes
> also checkpatch warning:
>
> ERROR: do not use assignment in if condition
>
> Signed-off-by: Ran Sun <sunran001@...suo.com>
> ---
>   drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busgf119.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busgf119.c
> b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busgf119.c
> index 96bbdda0f439..a1cf406ff141 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busgf119.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/busgf119.c
> @@ -85,7 +85,8 @@ gf119_i2c_bus_new(struct nvkm_i2c_pad *pad, int id, u8
> drive,
>   {
>       struct gf119_i2c_bus *bus;
>
> -    if (!(bus = kzalloc(sizeof(*bus), GFP_KERNEL)))
> +    bus = kzalloc(sizeof(*bus), GFP_KERNEL);
> +    if (!bus)
>           return -ENOMEM;
>       *pbus = &bus->base;
>