#endif
if (DO_UPDATE(vc))
do_update_region(vc, (unsigned long) p, count);
+ notify_update(vc);
}
/* used by selection: complement pointer position */
scr_writew(old, screenpos(vc, old_offset, 1));
if (DO_UPDATE(vc))
vc->vc_sw->con_putc(vc, old, oldy, oldx);
+ notify_update(vc);
}
old_offset = offset;
oldy = (offset >> 1) / vc->vc_cols;
vc->vc_sw->con_putc(vc, new, oldy, oldx);
}
+ notify_update(vc);
}
-
}
static void insert_char(struct vc_data *vc, unsigned int nr)
* Redrawing of screen
*/
-static void clear_buffer_attributes(struct vc_data *vc)
+void clear_buffer_attributes(struct vc_data *vc)
{
unsigned short *p = (unsigned short *)vc->vc_origin;
int count = vc->vc_screenbuf_size / 2;
if (new_cols == vc->vc_cols && new_rows == vc->vc_rows)
return 0;
+ if (new_screen_size > (4 << 20))
+ return -EINVAL;
newscreen = kmalloc(new_screen_size, GFP_USER);
if (!newscreen)
return -ENOMEM;
+ if (vc == sel_cons)
+ clear_selection();
+
old_rows = vc->vc_rows;
old_row_size = vc->vc_size_row;
break;
case 3: /* erase scroll-back buffer (and whole display) */
scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char,
- vc->vc_screenbuf_size >> 1);
+ vc->vc_screenbuf_size);
set_origin(vc);
if (CON_IS_VISIBLE(vc))
update_screen(vc);
static struct class *vtconsole_class;
-static int bind_con_driver(const struct consw *csw, int first, int last,
+static int do_bind_con_driver(const struct consw *csw, int first, int last,
int deflt)
{
struct module *owner = csw->owner;
if (!try_module_get(owner))
return -ENODEV;
- console_lock();
+ WARN_CONSOLE_UNLOCKED();
/* check if driver is registered */
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
retval = 0;
err:
- console_unlock();
module_put(owner);
return retval;
};
+
+static int bind_con_driver(const struct consw *csw, int first, int last,
+ int deflt)
+{
+ int ret;
+
+ console_lock();
+ ret = do_bind_con_driver(csw, first, last, deflt);
+ console_unlock();
+ return ret;
+}
+
#ifdef CONFIG_VT_HW_CONSOLE_BINDING
static int con_is_graphics(const struct consw *csw, int first, int last)
{
* or 0 on success.
*/
int unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
+{
+ int retval;
+
+ console_lock();
+ retval = do_unbind_con_driver(csw, first, last, deflt);
+ console_unlock();
+ return retval;
+}
+EXPORT_SYMBOL(unbind_con_driver);
+
+/* unlocked version of unbind_con_driver() */
+int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
{
struct module *owner = csw->owner;
const struct consw *defcsw = NULL;
if (!try_module_get(owner))
return -ENODEV;
- console_lock();
+ WARN_CONSOLE_UNLOCKED();
/* check if driver is registered and if it is unbindable */
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
}
}
- if (retval) {
- console_unlock();
+ if (retval)
goto err;
- }
retval = -ENODEV;
}
}
- if (retval) {
- console_unlock();
+ if (retval)
goto err;
- }
- if (!con_is_bound(csw)) {
- console_unlock();
+ if (!con_is_bound(csw))
goto err;
- }
first = max(first, con_driver->first);
last = min(last, con_driver->last);
if (!con_is_bound(csw))
con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
- console_unlock();
/* ignore return value, binding should not fail */
- bind_con_driver(defcsw, first, last, deflt);
+ do_bind_con_driver(defcsw, first, last, deflt);
err:
module_put(owner);
return retval;
}
-EXPORT_SYMBOL(unbind_con_driver);
+EXPORT_SYMBOL_GPL(do_unbind_con_driver);
static int vt_bind(struct con_driver *con)
{
}
EXPORT_SYMBOL_GPL(con_debug_leave);
-/**
- * register_con_driver - register console driver to console layer
- * @csw: console driver
- * @first: the first console to take over, minimum value is 0
- * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
- *
- * DESCRIPTION: This function registers a console driver which can later
- * bind to a range of consoles specified by @first and @last. It will
- * also initialize the console driver by calling con_startup().
- */
-int register_con_driver(const struct consw *csw, int first, int last)
+static int do_register_con_driver(const struct consw *csw, int first, int last)
{
struct module *owner = csw->owner;
struct con_driver *con_driver;
const char *desc;
int i, retval = 0;
+ WARN_CONSOLE_UNLOCKED();
+
if (!try_module_get(owner))
return -ENODEV;
- console_lock();
-
for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
con_driver = ®istered_con_driver[i];
goto err;
desc = csw->con_startup();
-
- if (!desc)
+ if (!desc) {
+ retval = -ENODEV;
goto err;
+ }
retval = -EINVAL;
}
err:
- console_unlock();
module_put(owner);
return retval;
}
+
+/**
+ * register_con_driver - register console driver to console layer
+ * @csw: console driver
+ * @first: the first console to take over, minimum value is 0
+ * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1
+ *
+ * DESCRIPTION: This function registers a console driver which can later
+ * bind to a range of consoles specified by @first and @last. It will
+ * also initialize the console driver by calling con_startup().
+ */
+int register_con_driver(const struct consw *csw, int first, int last)
+{
+ int retval;
+
+ console_lock();
+ retval = do_register_con_driver(csw, first, last);
+ console_unlock();
+ return retval;
+}
EXPORT_SYMBOL(register_con_driver);
/**
*/
int unregister_con_driver(const struct consw *csw)
{
- int i, retval = -ENODEV;
+ int retval;
console_lock();
+ retval = do_unregister_con_driver(csw);
+ console_unlock();
+ return retval;
+}
+EXPORT_SYMBOL(unregister_con_driver);
+
+int do_unregister_con_driver(const struct consw *csw)
+{
+ int i, retval = -ENODEV;
/* cannot unregister a bound driver */
if (con_is_bound(csw))
}
}
err:
- console_unlock();
return retval;
}
-EXPORT_SYMBOL(unregister_con_driver);
+EXPORT_SYMBOL_GPL(do_unregister_con_driver);
/*
* If we support more console drivers, this function is used
* when a driver wants to take over some existing consoles
* and become default driver for newly opened ones.
*
- * take_over_console is basically a register followed by unbind
+ * take_over_console is basically a register followed by unbind
+ */
+int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
+{
+ int err;
+
+ err = do_register_con_driver(csw, first, last);
+ /*
+ * If we get an busy error we still want to bind the console driver
+ * and return success, as we may have unbound the console driver
+ * but not unregistered it.
+ */
+ if (err == -EBUSY)
+ err = 0;
+ if (!err)
+ do_bind_con_driver(csw, first, last, deflt);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(do_take_over_console);
+
+/*
+ * If we support more console drivers, this function is used
+ * when a driver wants to take over some existing consoles
+ * and become default driver for newly opened ones.
+ *
+ * take_over_console is basically a register followed by unbind
*/
int take_over_console(const struct consw *csw, int first, int last, int deflt)
{
int err;
err = register_con_driver(csw, first, last);
- /* if we get an busy error we still want to bind the console driver
+ /*
+ * If we get an busy error we still want to bind the console driver
* and return success, as we may have unbound the console driver
- * but not unregistered it.
- */
+ * but not unregistered it.
+ */
if (err == -EBUSY)
err = 0;
if (!err)
git.openpandora.org / pandora-kernel.git / blobdiff