vt: sort out locking for font handling
The font methods are console_lock covered. Unfortunately they don't extend
the lock over all the needed tests.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index ecdcc8a..ce2b823 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3969,9 +3969,6 @@
int rc = -EINVAL;
int c;
- if (vc->vc_mode != KD_TEXT)
- return -EINVAL;
-
if (op->data) {
font.data = kmalloc(max_font_size, GFP_KERNEL);
if (!font.data)
@@ -3980,7 +3977,9 @@
font.data = NULL;
console_lock();
- if (vc->vc_sw->con_font_get)
+ if (vc->vc_mode != KD_TEXT)
+ rc = -EINVAL;
+ else if (vc->vc_sw->con_font_get)
rc = vc->vc_sw->con_font_get(vc, &font);
else
rc = -ENOSYS;
@@ -4062,7 +4061,9 @@
if (IS_ERR(font.data))
return PTR_ERR(font.data);
console_lock();
- if (vc->vc_sw->con_font_set)
+ if (vc->vc_mode != KD_TEXT)
+ rc = -EINVAL;
+ else if (vc->vc_sw->con_font_set)
rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
else
rc = -ENOSYS;
@@ -4078,8 +4079,6 @@
char *s = name;
int rc;
- if (vc->vc_mode != KD_TEXT)
- return -EINVAL;
if (!op->data)
s = NULL;
@@ -4089,6 +4088,10 @@
name[MAX_FONT_NAME - 1] = 0;
console_lock();
+ if (vc->vc_mode != KD_TEXT) {
+ console_unlock();
+ return -EINVAL;
+ }
if (vc->vc_sw->con_font_default)
rc = vc->vc_sw->con_font_default(vc, &font, s);
else
@@ -4106,11 +4109,11 @@
int con = op->height;
int rc;
- if (vc->vc_mode != KD_TEXT)
- return -EINVAL;
console_lock();
- if (!vc->vc_sw->con_font_copy)
+ if (vc->vc_mode != KD_TEXT)
+ rc = -EINVAL;
+ else if (!vc->vc_sw->con_font_copy)
rc = -ENOSYS;
else if (con < 0 || !vc_cons_allocated(con))
rc = -ENOTTY;