linux-kernel - Re: [PATCH] uvc_driver: Error Fix in the file drivers/media/usb/uvc/uvc

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Message-ID: <20230903205906.GD13794@pendragon.ideasonboard.com>
Date:   Sun, 3 Sep 2023 23:59:06 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     fasih0001@...il.com
Cc:     mchehab@...nel.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] uvc_driver: Error Fix in the file
 drivers/media/usb/uvc/uvc_driver.c

Hello,

On Sun, Sep 03, 2023 at 02:54:31PM +0500, fasih0001@...il.com wrote:
> From: Fasih <fasih0001@...il.com>
> 
> Error fix for the line 2429 and 2430, The error message indicated that "Macros with complex values should be enclosed in parentheses".
> This typically means that the macro is defined in a way that involves complex expressions or compound literals,
> and the preprocessor requires them to be enclosed in parentheses for clarity and proper evaluation.
> To address this error and comply with the requirement to enclose complex values in parentheses,
> you should wrap the entire expression inside an extra set of parentheses.

Did you read Documentation/process/submitting-patches.rst ?

> Signed-off-by: Syed Muhammad Fasih Ul Hassan <fasih0001@...il.com>
> 
> --- a/drivers/media/usb/uvc/uvc_driver.c
> +++ b/drivers/media/usb/uvc/uvc_driver.c
> @@ -2095,6 +2095,8 @@ static int uvc_probe(struct usb_interface *intf,
>         int function;
>         int ret;
> 
> +       pr_info("I changed uvcvideo driver in the Linux Kernel\n");
> +

Have you read our patch before sending it out ?

>         /* Allocate memory for the device and initialize it. */
>         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
>         if (dev == NULL)
> @@ -2417,9 +2419,9 @@ static const struct uvc_device_info uvc_quirk_force_y8 = {
>         .quirks = UVC_QUIRK_FORCE_Y8,
>  };
> 
> -#define UVC_INFO_QUIRK(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q}
> -#define UVC_INFO_META(m) (kernel_ulong_t)&(struct uvc_device_info) \
> -       {.meta_format = m}
> +#define UVC_INFO_QUIRK(q) ((kernel_ulong_t)&(struct uvc_device_info){.quirks = q})
> +#define UVC_INFO_META(m) ((kernel_ulong_t)&(struct uvc_device_info) \
> +       {.meta_format = m})

Why do you think this is a good change ?

> ---
>  drivers/media/usb/uvc/uvc_driver.c | 15 ++++++++++++---
>  1 file changed, 12 insertions(+), 3 deletions(-)
> 

Your patch seems corrupted.

> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
> index 08fcd2ffa727..42d42b211094 100644
> --- a/drivers/media/usb/uvc/uvc_driver.c
> +++ b/drivers/media/usb/uvc/uvc_driver.c
> @@ -2095,6 +2095,8 @@ static int uvc_probe(struct usb_interface *intf,
>  	int function;
>  	int ret;
>  
> +	pr_info("I changed uvcvideo driver in the Linux Kernel\n");
> +
>  	/* Allocate memory for the device and initialize it. */
>  	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
>  	if (dev == NULL)
> @@ -2417,9 +2419,16 @@ static const struct uvc_device_info uvc_quirk_force_y8 = {
>  	.quirks = UVC_QUIRK_FORCE_Y8,
>  };
>  
> -#define UVC_INFO_QUIRK(q) (kernel_ulong_t)&(struct uvc_device_info){.quirks = q}
> -#define UVC_INFO_META(m) (kernel_ulong_t)&(struct uvc_device_info) \
> -	{.meta_format = m}
> +/* For line 2429 and 2430, The error message indicated that "Macros with complex values should be enclosed in parentheses".
> + * This typically means that the macro is defined in a way that involves complex expressions or compound literals,
> + * and the preprocessor requires them to be enclosed in parentheses for clarity and proper evaluation.
> + * To address this error and comply with the requirement to enclose complex values in parentheses,
> + * you should wrap the entire expression inside an extra set of parentheses like that:
> + * #define UVC_INFO_QUIRK(q) ((kernel_ulong_t)&(struct uvc_device_info){.quirks = q})
> + */
> +#define UVC_INFO_QUIRK(q) ((kernel_ulong_t)&(struct uvc_device_info){.quirks = q})
> +#define UVC_INFO_META(m) ((kernel_ulong_t)&(struct uvc_device_info) \
> +	{.meta_format = m})
>  
>  /*
>   * The Logitech cameras listed below have their interface class set to

-- 
Regards,

Laurent Pinchart