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authorAndy Lutomirski <luto@MIT.EDU>2011-05-26 10:13:34 -0400
committerPaul Mundt <lethal@linux-sh.org>2011-06-02 17:18:07 +0900
commitbb8b26627267a82c49f47fc52a0785f079a7b063 (patch)
treebb1559a35d5417a6dd08790b50ba8a99bdc90f68 /drivers/video/efifb.c
parentda0241f12bf785f74e57ad6d67abdf269216f76b (diff)
downloadop-kernel-dev-bb8b26627267a82c49f47fc52a0785f079a7b063.zip
op-kernel-dev-bb8b26627267a82c49f47fc52a0785f079a7b063.tar.gz
efifb: Disallow manual bind and unbind
Both were buggy: bind would happily scribble over a real graphics device and unbind wouldn't destroy the framebuffer. Hotplugging efifb makes no sense anyway, so just disable it. As an added benefit, we save some runtime memory. Signed-off-by: Andy Lutomirski <luto@mit.edu> Signed-off-by: Peter Jones <pjones@redhat.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/video/efifb.c')
-rw-r--r--drivers/video/efifb.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/video/efifb.c b/drivers/video/efifb.c
index 8cb31e1..69c49df 100644
--- a/drivers/video/efifb.c
+++ b/drivers/video/efifb.c
@@ -330,7 +330,7 @@ static int __init efifb_setup(char *options)
return 0;
}
-static int __devinit efifb_probe(struct platform_device *dev)
+static int __init efifb_probe(struct platform_device *dev)
{
struct fb_info *info;
int err;
@@ -500,7 +500,6 @@ err_release_mem:
}
static struct platform_driver efifb_driver = {
- .probe = efifb_probe,
.driver = {
.name = "efifb",
},
@@ -531,13 +530,21 @@ static int __init efifb_init(void)
if (!screen_info.lfb_linelength)
return -ENODEV;
- ret = platform_driver_register(&efifb_driver);
+ ret = platform_device_register(&efifb_device);
+ if (ret)
+ return ret;
- if (!ret) {
- ret = platform_device_register(&efifb_device);
- if (ret)
- platform_driver_unregister(&efifb_driver);
+ /*
+ * This is not just an optimization. We will interfere
+ * with a real driver if we get reprobed, so don't allow
+ * it.
+ */
+ ret = platform_driver_probe(&efifb_driver, efifb_probe);
+ if (ret) {
+ platform_device_unregister(&efifb_driver);
+ return ret;
}
+
return ret;
}
module_init(efifb_init);
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