From: Jiri Slaby <jslaby@xxxxxxx>
This patch has been added to the 3.18 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit 6798df4c5fe0a7e6d2065cf79649a794e5ba7114 ]
When csw->con_startup() fails in do_register_con_driver, we return no
error (i.e. 0). This was changed back in 2006 by commit 3e795de763.
Before that we used to return -ENODEV.
So fix the return value to be -ENODEV in that case again.
Fixes: 3e795de763 ("VT binding: Add binding/unbinding support for the VT console")
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
Reported-by: "Dan Carpenter" <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
drivers/tty/vt/vt.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 53c25bc..9062636 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3591,9 +3591,10 @@ static int do_register_con_driver(const struct consw *csw, int first, int last)
goto err;
desc = csw->con_startup();
-
- if (!desc)
+ if (!desc) {
+ retval = -ENODEV;
goto err;
+ }
retval = -EINVAL;
--
2.5.0
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