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-rw-r--r--drivers/video/console/fbcon.c42
-rw-r--r--drivers/video/fbmem.c26
-rw-r--r--include/linux/fb.h2
3 files changed, 66 insertions, 4 deletions
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 9b66331020dd..decfdc8eb9cc 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -3003,6 +3003,45 @@ static int fbcon_mode_deleted(struct fb_info *info,
return found;
}
+#ifdef CONFIG_VT_HW_CONSOLE_BINDING
+static int fbcon_unbind(void)
+{
+ int ret;
+
+ ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
+ fbcon_is_default);
+ return ret;
+}
+#else
+static inline int fbcon_unbind(void)
+{
+ return -EINVAL;
+}
+#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
+
+static int fbcon_fb_unbind(int idx)
+{
+ int i, new_idx = -1, ret = 0;
+
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ if (con2fb_map[i] != idx &&
+ con2fb_map[i] != -1) {
+ new_idx = i;
+ break;
+ }
+ }
+
+ if (new_idx != -1) {
+ for (i = first_fb_vc; i <= last_fb_vc; i++) {
+ if (con2fb_map[i] == idx)
+ set_con2fb_map(i, new_idx, 0);
+ }
+ } else
+ ret = fbcon_unbind();
+
+ return ret;
+}
+
static int fbcon_fb_unregistered(struct fb_info *info)
{
int i, idx = info->node;
@@ -3210,6 +3249,9 @@ static int fbcon_event_notify(struct notifier_block *self,
mode = event->data;
ret = fbcon_mode_deleted(info, mode);
break;
+ case FB_EVENT_FB_UNBIND:
+ ret = fbcon_fb_unbind(info->node);
+ break;
case FB_EVENT_FB_REGISTERED:
ret = fbcon_fb_registered(info);
break;
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 8d6dbe8b8dd1..7f3a0cca0fd4 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1334,17 +1334,34 @@ register_framebuffer(struct fb_info *fb_info)
*
* Returns negative errno on error, or zero for success.
*
+ * This function will also notify the framebuffer console
+ * to release the driver.
+ *
+ * This is meant to be called within a driver's module_exit()
+ * function. If this is called outside module_exit(), ensure
+ * that the driver implements fb_open() and fb_release() to
+ * check that no processes are using the device.
*/
int
unregister_framebuffer(struct fb_info *fb_info)
{
struct fb_event event;
- int i;
+ int i, ret = 0;
i = fb_info->node;
- if (!registered_fb[i])
- return -EINVAL;
+ if (!registered_fb[i]) {
+ ret = -EINVAL;
+ goto done;
+ }
+
+ event.info = fb_info;
+ ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
+
+ if (ret) {
+ ret = -EINVAL;
+ goto done;
+ }
if (fb_info->pixmap.addr &&
(fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
@@ -1356,7 +1373,8 @@ unregister_framebuffer(struct fb_info *fb_info)
device_destroy(fb_class, MKDEV(FB_MAJOR, i));
event.info = fb_info;
fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
- return 0;
+done:
+ return ret;
}
/**
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 66226824ab68..8628423c6dd3 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -529,6 +529,8 @@ struct fb_cursor_user {
#define FB_EVENT_CONBLANK 0x0C
/* Get drawing requirements */
#define FB_EVENT_GET_REQ 0x0D
+/* Unbind from the console if possible */
+#define FB_EVENT_FB_UNBIND 0x0E
struct fb_event {
struct fb_info *info;