diff options
| author | Antonino A. Daplas <adaplas@gmail.com> | 2007-05-08 00:39:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:31 -0700 |
| commit | 38b4982c6388ae9596f959e3d7fef91affbd181d (patch) | |
| tree | fb3938204e811886c2793908dca528e20b40f665 /drivers | |
| parent | ff388ad05bc67163124ac74126bbc16faa2fb771 (diff) | |
fbcon: check if the character count can be handled
Fontmaps can be 256 or 512 in length. The only driver that can do tileblitting
can only handle 256 characters. Check for this when setting the font.
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/console/fbcon.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index c71a88d531c..6fc3501581d 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -685,6 +685,17 @@ static void set_blitting_type(struct vc_data *vc, struct fb_info *info) fbcon_set_bitops(ops); } } + +static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) +{ + int err = 0; + + if (info->flags & FBINFO_MISC_TILEBLITTING && + info->tileops->fb_get_tilemax(info) < charcount) + err = 1; + + return err; +} #else static void set_blitting_type(struct vc_data *vc, struct fb_info *info) { @@ -695,6 +706,12 @@ static void set_blitting_type(struct vc_data *vc, struct fb_info *info) fbcon_set_rotation(info); fbcon_set_bitops(ops); } + +static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) +{ + return 0; +} + #endif /* CONFIG_MISC_TILEBLITTING */ @@ -2518,6 +2535,10 @@ static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigne !(info->pixmap.blit_y & (1 << (font->height - 1)))) return -EINVAL; + /* Make sure driver can handle the font length */ + if (fbcon_invalid_charcount(info, charcount)) + return -EINVAL; + size = h * pitch * charcount; new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); |