Re: [Intel-gfx] [PATCH 8/8] fbdev: Simplify fb_is_primary_device for x86

[Javier Martinez Canillas <javierm@redhat.com>]

Daniel Vetter <daniel.vetter@ffwll.ch> writes:

> vga_default_device really is supposed to cover all corners, at least
> for x86. Additionally checking for rom shadowing should be redundant,
> because the bios/fw only does that for the boot vga device.
>
> If this turns out to be wrong, then most likely that's a special case
> which should be added to the vgaarb code, not replicated all over.
>
> Patch motived by changes to the aperture helpers, which also have this
> open code in a bunch of places, and which are all removed in a
> clean-up series. This function here is just for selecting the default
> fbdev device for fbcon, but I figured for consistency it might be good
> to throw this patch in on top.
>
> Note that the shadow rom check predates vgaarb, which was only wired
> up in 88674088d10c ("x86: Use vga_default_device() when determining
> whether an fb is primary"). That patch doesn't explain why we still
> fall back to the shadow rom check.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Helge Deller <deller@gmx.de>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: Javier Martinez Canillas <javierm@redhat.com>
> Cc: Thomas Zimmermann <tzimmermann@suse.de>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: Dave Hansen <dave.hansen@linux.intel.com>
> Cc: x86@kernel.org
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> ---
>  arch/x86/video/fbdev.c | 13 +------------

[...]

> +	if (pci_dev == vga_default_device())
>  		return 1;
>  	return 0;

or just return pci_dev == vga_default_device() ;

Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat