Re: [PATCH] HID: usbhid: Fix use assignment in if condition

[Greg KH]

On Tue, Jul 11, 2023 at 09:47:06AM +0800, wuyonggang001@xxxxxxxxxx wrote:
> Fix the following checkpatch error(s):
> 
> drivers/hid/usbhid/usbkbd.c:238:240:242:246: ERROR: do not use assignment in
> if condition
> 
> Signed-off-by: Yonggang Wu <wuyonggang001@xxxxxxxxxx>
> ---
>  drivers/hid/usbhid/usbkbd.c | 24 +++++++++++++++++++-----
>  1 file changed, 19 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/hid/usbhid/usbkbd.c b/drivers/hid/usbhid/usbkbd.c
> index c439ed2f16db..cde7f82b7070 100644
> --- a/drivers/hid/usbhid/usbkbd.c
> +++ b/drivers/hid/usbhid/usbkbd.c
> @@ -235,15 +235,29 @@ static void usb_kbd_close(struct input_dev *dev)
> 
>  static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
>  {
> -    if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
> +    kbd->irq = usb_alloc_urb(0, GFP_KERNEL)
> +
> +    if (!kbd->irq)
>          return -1;
> -    if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
> +
> +    kbd->led = usb_alloc_urb(0, GFP_KERNEL)
> +
> +    if (!kbd->led)
>          return -1;
> -    if (!(kbd->new = usb_alloc_coherent(dev, 8, GFP_KERNEL,
> &kbd->new_dma)))
> +
> +    kbd->new = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbd->new_dma)
> +
> +    if (!kbd->new)
>          return -1;
> -    if (!(kbd->cr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
> +
> +    kbd->cr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)
> +
> +    if (!kbd->cr)
>          return -1;
> -    if (!(kbd->leds = usb_alloc_coherent(dev, 1, GFP_KERNEL,
> &kbd->leds_dma)))
> +
> +    kbd->leds = usb_alloc_coherent(dev, 1, GFP_KERNEL, &kbd->leds_dma)
> +
> +    if (!kbd->leds)
>          return -1;
> 
>      return 0;

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

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thanks,

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