[PATCH 20/21] Revert "fbdev: Prevent probing generic drivers if a FB is already registered"
From: Daniel Vetter <hidden>
Date: 2022-01-31 21:09:08
Also in:
dri-devel, intel-gfx, lkml
Subsystem:
efifb framebuffer driver, framebuffer layer, simplefb fb driver, the rest · Maintainers:
Peter Jones, Helge Deller, Hans de Goede, Linus Torvalds
This reverts commit fb561bf9abde49f7e00fdbf9ed2ccf2d86cac8ee.
With
commit 27599aacbaefcbf2af7b06b0029459bbf682000d
Author: Thomas Zimmermann [off-list ref]
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 <redacted>
Cc: Javier Martinez Canillas <javierm@redhat.com>
Cc: Zack Rusin <redacted>
Cc: Hans de Goede <redacted>
Cc: Ilya Trukhanov <redacted>
Signed-off-by: Daniel Vetter <redacted>
Cc: Peter Jones <pjones@redhat.com>
Cc: linux-fbdev@vger.kernel.org
---
drivers/video/fbdev/efifb.c | 11 -----------
drivers/video/fbdev/simplefb.c | 11 -----------
2 files changed, 22 deletions(-)
diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c
index ea42ba6445b2..edca3703b964 100644
--- a/drivers/video/fbdev/efifb.c
+++ b/drivers/video/fbdev/efifb.c@@ -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;
diff --git a/drivers/video/fbdev/simplefb.c b/drivers/video/fbdev/simplefb.c
index 57541887188b..ee8b4412f7e4 100644
--- a/drivers/video/fbdev/simplefb.c
+++ b/drivers/video/fbdev/simplefb.c@@ -407,17 +407,6 @@ static int simplefb_probe(struct platform_device *pdev) struct simplefb_par *par; struct resource *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;
--
2.33.0