1 files changed, 144 insertions, 60 deletions

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 4b7be685c160..26effab5a13e 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -125,6 +125,8 @@ static int softback_lines;
 static int first_fb_vc;
 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 static int fbcon_is_default = 1; 
+static int fbcon_has_exited;
+
 /* font data */
 static char fontname[40];
 
@@ -140,7 +142,6 @@ static const struct consw fb_con;
 
 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 
-static void fbcon_free_font(struct display *);
 static int fbcon_set_origin(struct vc_data *);
 
 #define CURSOR_DRAW_DELAY               (1)
@@ -255,7 +256,7 @@ static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
         if (!ops || ops->currcon < 0 || rotate > 3)
                 return;
 
-        for (i = 0; i < MAX_NR_CONSOLES; i++) {
+        for (i = first_fb_vc; i <= last_fb_vc; i++) {
                 vc = vc_cons[i].d;
                 if (!vc || vc->vc_mode != KD_TEXT ||
                     registered_fb[con2fb_map[i]] != info)
@@ -534,7 +535,7 @@ static int search_fb_in_map(int idx)
 {
         int i, retval = 0;
 
-        for (i = 0; i < MAX_NR_CONSOLES; i++) {
+        for (i = first_fb_vc; i <= last_fb_vc; i++) {
                 if (con2fb_map[i] == idx)
                         retval = 1;
         }
@@ -545,7 +546,7 @@ static int search_for_mapped_con(void)
 {
         int i, retval = 0;
 
-        for (i = 0; i < MAX_NR_CONSOLES; i++) {
+        for (i = first_fb_vc; i <= last_fb_vc; i++) {
                 if (con2fb_map[i] != -1)
                         retval = 1;
         }
@@ -567,6 +568,7 @@ static int fbcon_takeover(int show_logo)
 
         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
                                 fbcon_is_default);
+
         if (err) {
                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
                         con2fb_map[i] = -1;
@@ -801,8 +803,8 @@ static int set_con2fb_map(int unit, int newidx, int user)
         if (oldidx == newidx)
                 return 0;
 
-        if (!info)
-                err =  -EINVAL;
+        if (!info || fbcon_has_exited)
+                return -EINVAL;
 
         if (!err && !search_for_mapped_con()) {
                 info_idx = newidx;
@@ -838,6 +840,9 @@ static int set_con2fb_map(int unit, int newidx, int user)
                 con2fb_init_display(vc, info, unit, show_logo);
         }
 
+        if (!search_fb_in_map(info_idx))
+                info_idx = newidx;
+
         release_console_sem();
         return err;
 }
@@ -1040,6 +1045,7 @@ static const char *fbcon_startup(void)
 #endif                          /* CONFIG_MAC */
 
         fbcon_add_cursor_timer(info);
+        fbcon_has_exited = 0;
         return display_desc;
 }
 
@@ -1067,17 +1073,36 @@ static void fbcon_init(struct vc_data *vc, int init)
 
         /* If we are not the first console on this
            fb, copy the font from that console */
-        t = &fb_display[svc->vc_num];
-        if (!vc->vc_font.data) {
-                vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
-                vc->vc_font.width = (*default_mode)->vc_font.width;
-                vc->vc_font.height = (*default_mode)->vc_font.height;
-                p->userfont = t->userfont;
-                if (p->userfont)
-                        REFCOUNT(p->fontdata)++;
+        t = &fb_display[fg_console];
+        if (!p->fontdata) {
+                if (t->fontdata) {
+                        struct vc_data *fvc = vc_cons[fg_console].d;
+
+                        vc->vc_font.data = (void *)(p->fontdata =
+                                                    fvc->vc_font.data);
+                        vc->vc_font.width = fvc->vc_font.width;
+                        vc->vc_font.height = fvc->vc_font.height;
+                        p->userfont = t->userfont;
+
+                        if (p->userfont)
+                                REFCOUNT(p->fontdata)++;
+                } else {
+                        const struct font_desc *font = NULL;
+
+                        if (!fontname[0] || !(font = find_font(fontname)))
+                                font = get_default_font(info->var.xres,
+                                                        info->var.yres);
+                        vc->vc_font.width = font->width;
+                        vc->vc_font.height = font->height;
+                        vc->vc_font.data = (void *)(p->fontdata = font->data);
+                        vc->vc_font.charcount = 256; /* FIXME  Need to
+                                                        support more fonts */
+                }
         }
+
         if (p->userfont)
                 charcnt = FNTCHARCNT(p->fontdata);
+
         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
         if (charcnt == 256) {
@@ -1151,13 +1176,47 @@ static void fbcon_init(struct vc_data *vc, int init)
         ops->p = &fb_display[fg_console];
 }
 
+static void fbcon_free_font(struct display *p)
+{
+        if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
+                kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
+        p->fontdata = NULL;
+        p->userfont = 0;
+}
+
 static void fbcon_deinit(struct vc_data *vc)
 {
         struct display *p = &fb_display[vc->vc_num];
+        struct fb_info *info;
+        struct fbcon_ops *ops;
+        int idx;
 
-        if (info_idx != -1)
-            return;
         fbcon_free_font(p);
+        idx = con2fb_map[vc->vc_num];
+
+        if (idx == -1)
+                goto finished;
+
+        info = registered_fb[idx];
+
+        if (!info)
+                goto finished;
+
+        ops = info->fbcon_par;
+
+        if (!ops)
+                goto finished;
+
+        if (CON_IS_VISIBLE(vc))
+                fbcon_del_cursor_timer(info);
+
+        ops->flags &= ~FBCON_FLAGS_INIT;
+finished:
+
+        if (!con_is_bound(&fb_con))
+                fbcon_exit();
+
+        return;
 }
 
 /* ====================================================================== */
@@ -2227,14 +2286,6 @@ static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
         return 0;
 }
 
-static void fbcon_free_font(struct display *p)
-{
-        if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
-                kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
-        p->fontdata = NULL;
-        p->userfont = 0;
-}
-
 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
 {
         u8 *fontdata = vc->vc_font.data;
@@ -2448,7 +2499,7 @@ static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigne
 
         FNTSUM(new_data) = csum;
         /* Check if the same font is on some other console already */
-        for (i = 0; i < MAX_NR_CONSOLES; i++) {
+        for (i = first_fb_vc; i <= last_fb_vc; i++) {
                 struct vc_data *tmp = vc_cons[i].d;
                 
                 if (fb_display[i].userfont &&
@@ -2773,7 +2824,7 @@ static void fbcon_set_all_vcs(struct fb_info *info)
         if (!ops || ops->currcon < 0)
                 return;
 
-        for (i = 0; i < MAX_NR_CONSOLES; i++) {
+        for (i = first_fb_vc; i <= last_fb_vc; i++) {
                 vc = vc_cons[i].d;
                 if (!vc || vc->vc_mode != KD_TEXT ||
                     registered_fb[con2fb_map[i]] != info)
@@ -2835,21 +2886,55 @@ static int fbcon_mode_deleted(struct fb_info *info,
         return found;
 }
 
+static int fbcon_fb_unregistered(int idx)
+{
+        int i;
+
+        for (i = first_fb_vc; i <= last_fb_vc; i++) {
+                if (con2fb_map[i] == idx)
+                        con2fb_map[i] = -1;
+        }
+
+        if (idx == info_idx) {
+                info_idx = -1;
+
+                for (i = 0; i < FB_MAX; i++) {
+                        if (registered_fb[i] != NULL) {
+                                info_idx = i;
+                                break;
+                        }
+                }
+        }
+
+        if (info_idx != -1) {
+                for (i = first_fb_vc; i <= last_fb_vc; i++) {
+                        if (con2fb_map[i] == -1)
+                                con2fb_map[i] = info_idx;
+                }
+        }
+
+        if (!num_registered_fb)
+                unregister_con_driver(&fb_con);
+
+        return 0;
+}
+
 static int fbcon_fb_registered(int idx)
 {
         int ret = 0, i;
 
         if (info_idx == -1) {
-                for (i = 0; i < MAX_NR_CONSOLES; i++) {
+                for (i = first_fb_vc; i <= last_fb_vc; i++) {
                         if (con2fb_map_boot[i] == idx) {
                                 info_idx = idx;
                                 break;
                         }
                 }
+
                 if (info_idx != -1)
                         ret = fbcon_takeover(1);
         } else {
-                for (i = 0; i < MAX_NR_CONSOLES; i++) {
+                for (i = first_fb_vc; i <= last_fb_vc; i++) {
                         if (con2fb_map_boot[i] == idx &&
                             con2fb_map[i] == -1)
                                 set_con2fb_map(i, idx, 0);
@@ -2888,7 +2973,7 @@ static void fbcon_new_modelist(struct fb_info *info)
         struct fb_var_screeninfo var;
         struct fb_videomode *mode;
 
-        for (i = 0; i < MAX_NR_CONSOLES; i++) {
+        for (i = first_fb_vc; i <= last_fb_vc; i++) {
                 if (registered_fb[con2fb_map[i]] != info)
                         continue;
                 if (!fb_display[i].mode)
@@ -2916,6 +3001,14 @@ static int fbcon_event_notify(struct notifier_block *self,
         struct fb_con2fbmap *con2fb;
         int ret = 0;
 
+        /*
+         * ignore all events except driver registration and deregistration
+         * if fbcon is not active
+         */
+        if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
+                                  action == FB_EVENT_FB_UNREGISTERED))
+                goto done;
+
         switch(action) {
         case FB_EVENT_SUSPEND:
                 fbcon_suspended(info);
@@ -2936,6 +3029,9 @@ static int fbcon_event_notify(struct notifier_block *self,
         case FB_EVENT_FB_REGISTERED:
                 ret = fbcon_fb_registered(info->node);
                 break;
+        case FB_EVENT_FB_UNREGISTERED:
+                ret = fbcon_fb_unregistered(info->node);
+                break;
         case FB_EVENT_SET_CONSOLE_MAP:
                 con2fb = event->data;
                 ret = set_con2fb_map(con2fb->console - 1,
@@ -2953,6 +3049,7 @@ static int fbcon_event_notify(struct notifier_block *self,
                 break;
         }
 
+done:
         return ret;
 }
 
@@ -2997,6 +3094,9 @@ static ssize_t store_rotate(struct class_device *class_device,
         int rotate, idx;
         char **last = NULL;
 
+        if (fbcon_has_exited)
+                return count;
+
         acquire_console_sem();
         idx = con2fb_map[fg_console];
 
@@ -3018,6 +3118,9 @@ static ssize_t store_rotate_all(struct class_device *class_device,
         int rotate, idx;
         char **last = NULL;
 
+        if (fbcon_has_exited)
+                return count;
+
         acquire_console_sem();
         idx = con2fb_map[fg_console];
 
@@ -3037,6 +3140,9 @@ static ssize_t show_rotate(struct class_device *class_device, char *buf)
         struct fb_info *info;
         int rotate = 0, idx;
 
+        if (fbcon_has_exited)
+                return 0;
+
         acquire_console_sem();
         idx = con2fb_map[fg_console];
 
@@ -3050,32 +3156,9 @@ err:
         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
 }
 
-static ssize_t store_attach(struct class_device *class_device,
-                            const char *buf, size_t count)
-{
-        if (info_idx == -1)
-                fbcon_start();
-
-        return count;
-}
-
-static ssize_t store_detach(struct class_device *class_device,
-                            const char *buf, size_t count)
-{
-        if (info_idx != -1) {
-                fbcon_exit();
-                give_up_console(&fb_con);
-        }
-
-        info_idx = -1;
-        return count;
-}
-
 static struct class_device_attribute class_device_attrs[] = {
         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
-        __ATTR(attach, S_IWUSR, NULL, store_attach),
-        __ATTR(detach, S_IWUSR, NULL, store_detach),
 };
 
 static int fbcon_init_class_device(void)
@@ -3112,7 +3195,9 @@ static void fbcon_exit(void)
         struct fb_info *info;
         int i, j, mapped;
 
-        acquire_console_sem();
+        if (fbcon_has_exited)
+                return;
+
 #ifdef CONFIG_ATARI
         free_irq(IRQ_AUTO_4, fbcon_vbl_handler);
 #endif
@@ -3131,11 +3216,9 @@ static void fbcon_exit(void)
                 if (info == NULL)
                         continue;
 
-                for (j = 0; j < MAX_NR_CONSOLES; j++) {
-                        if (con2fb_map[j] == i) {
-                                con2fb_map[j] = -1;
+                for (j = first_fb_vc; j <= last_fb_vc; j++) {
+                        if (con2fb_map[j] == i)
                                 mapped = 1;
-                        }
                 }
 
                 if (mapped) {
@@ -3151,11 +3234,10 @@ static void fbcon_exit(void)
 
                         if (info->queue.func == fb_flashcursor)
                                 info->queue.func = NULL;
-
                 }
         }
 
-        release_console_sem();
+        fbcon_has_exited = 1;
 }
 
 static int __init fb_console_init(void)
@@ -3189,7 +3271,7 @@ module_init(fb_console_init);
 
 #ifdef MODULE
 
-static void fbcon_deinit_class_device(void)
+static void __exit fbcon_deinit_class_device(void)
 {
         int i;
 
@@ -3204,7 +3286,9 @@ static void __exit fb_console_exit(void)
         fb_unregister_client(&fbcon_event_notifier);
         fbcon_deinit_class_device();
         class_device_destroy(fb_class, MKDEV(FB_MAJOR, FB_MAX));
+        fbcon_exit();
         release_console_sem();
+        unregister_con_driver(&fb_con);
 }       
 
 module_exit(fb_console_exit);