From: Fabio Erculiani <lxnay@xxxxxxxxxxx>
This patch makes possible to ship kernels with both vesafb and uvesafb
in order to guarantee a smooth transition to uvesafb and cope with
potential incompatibiles introduced by uvesafb making possible to disable
it via cmdline.
In case both vesafb and uvesafb are built-in, the kernel will try to
initialize both, which makes possible to select the wanted one using
either video=vesafb:... or video=uvesafb:....
In this way, old distro installations will keep working as before while
new ones can adopt video=uvesafb.
The behaviour does not change if uvesafb is built as a module.
---
drivers/video/uvesafb.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index d428445..04c4742 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c
@@ -1957,6 +1957,10 @@ static int uvesafb_init(void)
if (fb_get_options("uvesafb", &option))
return -ENODEV;
+ if (!option || !*option)
+ /* if vesafb is enabled, this will make possible to fallback to it */
+ return -ENODEV;
+
uvesafb_setup(option);
#endif
err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
--
1.8.1.5
--
To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
