Re: [PATCH] drm: use "0" instead of "" for deprecated driver date

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On Fri, May 10, 2024 at 12:09:51PM +0300, Jani Nikula wrote:
> libdrm does not like the empty string for driver date. Use "0" instead,
> which has been used by virtio previously.
> 
> Reported-by: Steven Price <steven.price@xxxxxxx>
> Closes: https://lore.kernel.org/r/9d0cff47-308e-4b11-a9f3-4157dc26b6fa@xxxxxxx
> Fixes: 7fb8af6798e8 ("drm: deprecate driver date")
> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
>  drivers/gpu/drm/drm_ioctl.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
> index 89feb7306e47..51f39912866f 100644
> --- a/drivers/gpu/drm/drm_ioctl.c
> +++ b/drivers/gpu/drm/drm_ioctl.c
> @@ -530,9 +530,9 @@ int drm_version(struct drm_device *dev, void *data,
>  	err = drm_copy_field(version->name, &version->name_len,
>  			dev->driver->name);
>  
> -	/* Driver date is deprecated. Return the empty string. */
> +	/* Driver date is deprecated. Userspace expects a non-empty string. */
>  	if (!err)
> -		err = drm_copy_field(version->date, &version->date_len, "");
> +		err = drm_copy_field(version->date, &version->date_len, "0");

Does this also fix igt/core_getversion which is on fire now?

>  	if (!err)
>  		err = drm_copy_field(version->desc, &version->desc_len,
>  				dev->driver->desc);
> -- 
> 2.39.2

-- 
Ville Syrjälä
Intel



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