linux-kernel - Re: [PATCH v2] drm/bochs: downgrade pci_request

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Date:   Fri, 7 Feb 2020 13:06:00 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Gerd Hoffmann <kraxel@...hat.com>, dri-devel@...ts.freedesktop.org
Cc:     marmarek@...isiblethingslab.com, David Airlie <airlied@...ux.ie>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:DRM DRIVER FOR BOCHS VIRTUAL GPU" 
        <virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH v2] drm/bochs: downgrade pci_request_region failure from
 error to warning

Hi

Am 07.02.20 um 12:57 schrieb Gerd Hoffmann:
> Shutdown of firmware framebuffer has a bunch of problems.  Because
> of this the framebuffer region might still be reserved even after
> drm_fb_helper_remove_conflicting_pci_framebuffers() returned.

Out of curiosity: what's going wrong here?

Best regards
Thomas

> 
> Don't consider pci_request_region() failure for the framebuffer
> region as fatal error to workaround this issue.
> 
> Reported-by: Marek Marczykowski-Górecki <marmarek@...isiblethingslab.com>
> Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
> ---
>  drivers/gpu/drm/bochs/bochs_hw.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bochs/bochs_hw.c b/drivers/gpu/drm/bochs/bochs_hw.c
> index b615b7dfdd9d..a387efa9e559 100644
> --- a/drivers/gpu/drm/bochs/bochs_hw.c
> +++ b/drivers/gpu/drm/bochs/bochs_hw.c
> @@ -157,8 +157,7 @@ int bochs_hw_init(struct drm_device *dev)
>  	}
>  
>  	if (pci_request_region(pdev, 0, "bochs-drm") != 0) {
> -		DRM_ERROR("Cannot request framebuffer\n");
> -		return -EBUSY;
> +		DRM_WARN("Cannot request framebuffer, boot framebuffer still active?\n");
>  	}
>  
>  	bochs->fb_map = ioremap(addr, size);
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer



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