diff options
| author | Frans Pop <elendil@planet.nl> | 2008-07-23 21:31:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-24 10:47:39 -0700 |
| commit | b604838ac6d233fd6bffc0e758a818133a01ff22 (patch) | |
| tree | ac77c9696511f754f09bd435b12841216da745ee /drivers/video/vfb.c | |
| parent | cfb4f5d1750e05f43902197713c50c29e7dfbc99 (diff) | |
vfb: only enable if explicitly requested when compiled in
The Kconfig help for the vfb driver says:
Do NOT enable it for normal systems! To protect the innocent, it
has to be enabled explicitly at boot time using the kernel option
`video=vfb:'.
This change lets the code match the description.
Support for vfb:disable is kept for backwards compatibility; vfb:off works
because it is tested at a higher level.
Note: any undefined option (e.g. vfb:enable) will also enable this driver.
The relevant code has been unchanged since before the migration to
git (2.6.12).
This patch fixes bugzilla #9310 and was the root cause behind
http://lkml.org/lkml/2008/5/31/220.
Signed-off-by: Frans Pop <elendil@planet.nl>
Cc: Antonino A. Daplas <adaplas@gmail.com>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/vfb.c')
| -rw-r--r-- | drivers/video/vfb.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/video/vfb.c b/drivers/video/vfb.c index 072638a9528a..93fe08d6c78f 100644 --- a/drivers/video/vfb.c +++ b/drivers/video/vfb.c @@ -443,19 +443,29 @@ static int vfb_mmap(struct fb_info *info, } #ifndef MODULE +/* + * The virtual framebuffer driver is only enabled if explicitly + * requested by passing 'video=vfb:' (or any actual options). + */ static int __init vfb_setup(char *options) { char *this_opt; + vfb_enable = 0; + + if (!options) + return 1; + vfb_enable = 1; - if (!options || !*options) + if (!*options) return 1; while ((this_opt = strsep(&options, ",")) != NULL) { if (!*this_opt) continue; - if (!strncmp(this_opt, "disable", 7)) + /* Test disable for backwards compatibility */ + if (!strcmp(this_opt, "disable")) vfb_enable = 0; } return 1; |