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author | Ingo Molnar <mingo@kernel.org> | 2021-12-13 12:48:46 +0300 |
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committer | Ingo Molnar <mingo@kernel.org> | 2021-12-13 12:48:46 +0300 |
commit | 6773cc31a9bb5122fd5c288f73ca006ad20a6c17 (patch) | |
tree | 730ec8bcc0a5ddd5030268bb3ffd4945d34728c1 /drivers/video/fbdev/simplefb.c | |
parent | 0f09c274698590d508c43f924d9dffc7130b782d (diff) | |
parent | 2585cf9dfaaddf00b069673f27bb3f8530e2039c (diff) | |
download | linux-6773cc31a9bb5122fd5c288f73ca006ad20a6c17.tar.xz |
Merge tag 'v5.16-rc5' into locking/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/video/fbdev/simplefb.c')
-rw-r--r-- | drivers/video/fbdev/simplefb.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/video/fbdev/simplefb.c b/drivers/video/fbdev/simplefb.c index 62f0ded70681..b63074fd892e 100644 --- a/drivers/video/fbdev/simplefb.c +++ b/drivers/video/fbdev/simplefb.c @@ -407,6 +407,17 @@ 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; |