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Revert "fbdev: Prevent probing generic drivers if a FB is already registered" 

This reverts commit fb561bf9ab.

With

commit 27599aacba
Author: Thomas Zimmermann <tzimmermann@suse.de>
Date:   Tue Jan 25 10:12:18 2022 +0100

    fbdev: Hot-unplug firmware fb devices on forced removal

this should be fixed properly and we can remove this somewhat hackish
check here (e.g. this won't catch drm drivers if fbdev emulation isn't
enabled).

Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Zack Rusin <zackr@vmware.com>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Cc: Zack Rusin <zackr@vmware.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Ilya Trukhanov <lahvuun@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: linux-fbdev@vger.kernel.org
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220607182338.344270-5-javierm@redhat.com
This commit is contained in:
Daniel Vetter 2022-06-07 20:23:37 +02:00 committed by Javier Martinez Canillas
parent 873eb3b118
commit bdde97ac4b
No known key found for this signature in database
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2 changed files with 0 additions and 22 deletions
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11
drivers/video/fbdev/efifb.c
View File

@ -351,17 +351,6 @@ static int efifb_probe(struct platform_device *dev)
char *option = NULL;
efi_memory_desc_t md;
/*
* Generic drivers must not be registered if a framebuffer exists.
* If a native driver was probed, the display hardware was already
* taken and attempting to use the system framebuffer is dangerous.
*/
if (num_registered_fb > 0) {
dev_err(&dev->dev,
"efifb: a framebuffer is already registered\n");
return -EINVAL;
}
if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI || pci_dev_disabled)
return -ENODEV;

11
drivers/video/fbdev/simplefb.c
View File

@ -413,17 +413,6 @@ static int simplefb_probe(struct platform_device *pdev)
struct simplefb_par *par;
struct resource *res, *mem;
/*
* Generic drivers must not be registered if a framebuffer exists.
* If a native driver was probed, the display hardware was already
* taken and attempting to use the system framebuffer is dangerous.
*/
if (num_registered_fb > 0) {
dev_err(&pdev->dev,
"simplefb: a framebuffer is already registered\n");
return -EINVAL;
}
if (fb_get_options("simplefb", NULL))
return -ENODEV;