[PATCH] fbcon: Sanitize fbcon

Do not pass the structure display since fbcon is already keeping the pointer
to the current display.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

8 files changed, 71 insertions, 82 deletions

diff --git a/drivers/video/console/bitblit.c b/drivers/video/console/bitblit.c
index e65fc3ef7630..eea422eb1ab5 100644
--- a/drivers/video/console/bitblit.c
+++ b/drivers/video/console/bitblit.c
@@ -234,14 +234,14 @@ static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
         }
 }
 
-static void bit_cursor(struct vc_data *vc, struct fb_info *info,
-                       struct display *p, int mode, int softback_lines, int fg, int bg)
+static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+                       int softback_lines, int fg, int bg)
 {
         struct fb_cursor cursor;
-        struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
+        struct fbcon_ops *ops = info->fbcon_par;
         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
         int w = (vc->vc_font.width + 7) >> 3, c;
-        int y = real_y(p, vc->vc_y);
+        int y = real_y(ops->p, vc->vc_y);
         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
         int err = 1;
         char *src;
@@ -310,7 +310,7 @@ static void bit_cursor(struct vc_data *vc, struct fb_info *info,
         }
 
         if (cursor.set & FB_CUR_SETSIZE ||
-            vc->vc_cursor_type != p->cursor_shape ||
+            vc->vc_cursor_type != ops->p->cursor_shape ||
             ops->cursor_state.mask == NULL ||
             ops->cursor_reset) {
                 char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
@@ -323,10 +323,10 @@ static void bit_cursor(struct vc_data *vc, struct fb_info *info,
                 kfree(ops->cursor_state.mask);
                 ops->cursor_state.mask = mask;
 
-                p->cursor_shape = vc->vc_cursor_type;
+                ops->p->cursor_shape = vc->vc_cursor_type;
                 cursor.set |= FB_CUR_SETSHAPE;
 
-                switch (p->cursor_shape & CUR_HWMASK) {
+                switch (ops->p->cursor_shape & CUR_HWMASK) {
                 case CUR_NONE:
                         cur_height = 0;
                         break;
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 50e4c4eb491f..42ea3af8a9ad 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -209,13 +209,13 @@ static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
 #endif
 
 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
-static inline void fbcon_set_rotation(struct fb_info *info, struct display *p)
+static inline void fbcon_set_rotation(struct fb_info *info)
 {
         struct fbcon_ops *ops = info->fbcon_par;
 
         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
-            p->con_rotate < 4)
-                ops->rotate = p->con_rotate;
+            ops->p->con_rotate < 4)
+                ops->rotate = ops->p->con_rotate;
         else
                 ops->rotate = 0;
 }
@@ -265,7 +265,7 @@ static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
         fbcon_set_all_vcs(info);
 }
 #else
-static inline void fbcon_set_rotation(struct fb_info *info, struct display *p)
+static inline void fbcon_set_rotation(struct fb_info *info)
 {
         struct fbcon_ops *ops = info->fbcon_par;
 
@@ -402,7 +402,7 @@ static void fb_flashcursor(void *private)
         c = scr_readw((u16 *) vc->vc_pos);
         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
                 CM_ERASE : CM_DRAW;
-        ops->cursor(vc, info, p, mode, softback_lines, get_color(vc, info, c, 1),
+        ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
                     get_color(vc, info, c, 0));
         release_console_sem();
 }
@@ -647,29 +647,27 @@ static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 }
 
 #ifdef CONFIG_FB_TILEBLITTING
-static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
-                              struct display *p)
+static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 {
         struct fbcon_ops *ops = info->fbcon_par;
 
-        ops->p = (p) ? p : &fb_display[vc->vc_num];
+        ops->p = &fb_display[vc->vc_num];
 
         if ((info->flags & FBINFO_MISC_TILEBLITTING))
-                fbcon_set_tileops(vc, info, p, ops);
+                fbcon_set_tileops(vc, info);
         else {
-                fbcon_set_rotation(info, ops->p);
+                fbcon_set_rotation(info);
                 fbcon_set_bitops(ops);
         }
 }
 #else
-static void set_blitting_type(struct vc_data *vc, struct fb_info *info,
-                              struct display *p)
+static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 {
         struct fbcon_ops *ops = info->fbcon_par;
 
         info->flags &= ~FBINFO_MISC_TILEBLITTING;
-        ops->p = (p) ? p : &fb_display[vc->vc_num];
-        fbcon_set_rotation(info, ops->p);
+        ops->p = &fb_display[vc->vc_num];
+        fbcon_set_rotation(info);
         fbcon_set_bitops(ops);
 }
 #endif /* CONFIG_MISC_TILEBLITTING */
@@ -697,7 +695,7 @@ static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
         if (!err) {
                 memset(ops, 0, sizeof(struct fbcon_ops));
                 info->fbcon_par = ops;
-                set_blitting_type(vc, info, NULL);
+                set_blitting_type(vc, info);
         }
 
         if (err) {
@@ -933,7 +931,7 @@ static const char *fbcon_startup(void)
         ops->cur_rotate = -1;
         info->fbcon_par = ops;
         p->con_rotate = rotate;
-        set_blitting_type(vc, info, NULL);
+        set_blitting_type(vc, info);
 
         if (info->fix.type != FB_TYPE_TEXT) {
                 if (fbcon_softback_size) {
@@ -1093,7 +1091,7 @@ static void fbcon_init(struct vc_data *vc, int init)
 
         ops = info->fbcon_par;
         p->con_rotate = rotate;
-        set_blitting_type(vc, info, NULL);
+        set_blitting_type(vc, info);
 
         cols = vc->vc_cols;
         rows = vc->vc_rows;
@@ -1141,9 +1139,9 @@ static void fbcon_init(struct vc_data *vc, int init)
         if (vc == svc && softback_buf)
                 fbcon_update_softback(vc);
 
-        if (ops->rotate_font && ops->rotate_font(info, vc, p)) {
+        if (ops->rotate_font && ops->rotate_font(info, vc)) {
                 ops->rotate = FB_ROTATE_UR;
-                set_blitting_type(vc, info, p);
+                set_blitting_type(vc, info);
         }
 
 }
@@ -1243,7 +1241,6 @@ static void fbcon_cursor(struct vc_data *vc, int mode)
 {
         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
         struct fbcon_ops *ops = info->fbcon_par;
-        struct display *p = &fb_display[vc->vc_num];
         int y;
         int c = scr_readw((u16 *) vc->vc_pos);
 
@@ -1260,7 +1257,7 @@ static void fbcon_cursor(struct vc_data *vc, int mode)
                 y = 0;
         }
 
-        ops->cursor(vc, info, p, mode, y, get_color(vc, info, c, 1),
+        ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
                     get_color(vc, info, c, 0));
         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
 }
@@ -2111,12 +2108,12 @@ static int fbcon_switch(struct vc_data *vc)
                 fbcon_add_cursor_timer(info);
         }
 
-        set_blitting_type(vc, info, p);
+        set_blitting_type(vc, info);
         ops->cursor_reset = 1;
 
-        if (ops->rotate_font && ops->rotate_font(info, vc, p)) {
+        if (ops->rotate_font && ops->rotate_font(info, vc)) {
                 ops->rotate = FB_ROTATE_UR;
-                set_blitting_type(vc, info, p);
+                set_blitting_type(vc, info);
         }
 
         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
@@ -2739,7 +2736,7 @@ static void fbcon_modechanged(struct fb_info *info)
                 return;
 
         p = &fb_display[vc->vc_num];
-        set_blitting_type(vc, info, p);
+        set_blitting_type(vc, info);
 
         if (CON_IS_VISIBLE(vc)) {
                 var_to_display(p, &info->var, info);
@@ -2781,7 +2778,7 @@ static void fbcon_set_all_vcs(struct fb_info *info)
                         continue;
 
                 p = &fb_display[vc->vc_num];
-                set_blitting_type(vc, info, p);
+                set_blitting_type(vc, info);
                 var_to_display(p, &info->var, info);
                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
diff --git a/drivers/video/console/fbcon.h b/drivers/video/console/fbcon.h
index 6892e7ff34de..c38c3d8e7a74 100644
--- a/drivers/video/console/fbcon.h
+++ b/drivers/video/console/fbcon.h
@@ -62,12 +62,10 @@ struct fbcon_ops {
                       int fg, int bg);
         void (*clear_margins)(struct vc_data *vc, struct fb_info *info,
                               int bottom_only);
-        void (*cursor)(struct vc_data *vc, struct fb_info *info,
-                       struct display *p, int mode, int softback_lines,
-                       int fg, int bg);
+        void (*cursor)(struct vc_data *vc, struct fb_info *info, int mode,
+                       int softback_lines, int fg, int bg);
         int  (*update_start)(struct fb_info *info);
-        int  (*rotate_font)(struct fb_info *info, struct vc_data *vc,
-                            struct display *p);
+        int  (*rotate_font)(struct fb_info *info, struct vc_data *vc);
         struct fb_var_screeninfo var;  /* copy of the current fb_var_screeninfo */
         struct timer_list cursor_timer; /* Cursor timer */
         struct fb_cursor cursor_state;
@@ -173,8 +171,7 @@ struct fbcon_ops {
 #define SCROLL_PAN_REDRAW  0x005
 
 #ifdef CONFIG_FB_TILEBLITTING
-extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info,
-                              struct display *p, struct fbcon_ops *ops);
+extern void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info);
 #endif
 extern void fbcon_set_bitops(struct fbcon_ops *ops);
 extern int  soft_cursor(struct fb_info *info, struct fb_cursor *cursor);
diff --git a/drivers/video/console/fbcon_ccw.c b/drivers/video/console/fbcon_ccw.c
index 4952b66ae206..990289a69b78 100644
--- a/drivers/video/console/fbcon_ccw.c
+++ b/drivers/video/console/fbcon_ccw.c
@@ -219,19 +219,18 @@ static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info,
         }
 }
 
-static void ccw_cursor(struct vc_data *vc, struct fb_info *info,
-                      struct display *p, int mode, int softback_lines,
-                      int fg, int bg)
+static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+                       int softback_lines, int fg, int bg)
 {
         struct fb_cursor cursor;
-        struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
+        struct fbcon_ops *ops = info->fbcon_par;
         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
         int w = (vc->vc_font.height + 7) >> 3, c;
-        int y = real_y(p, vc->vc_y);
+        int y = real_y(ops->p, vc->vc_y);
         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
         int err = 1, dx, dy;
         char *src;
-        u32 vyres = GETVYRES(p->scrollmode, info);
+        u32 vyres = GETVYRES(ops->p->scrollmode, info);
 
         if (!ops->fontbuffer)
                 return;
@@ -303,7 +302,7 @@ static void ccw_cursor(struct vc_data *vc, struct fb_info *info,
         }
 
         if (cursor.set & FB_CUR_SETSIZE ||
-            vc->vc_cursor_type != p->cursor_shape ||
+            vc->vc_cursor_type != ops->p->cursor_shape ||
             ops->cursor_state.mask == NULL ||
             ops->cursor_reset) {
                 char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
@@ -323,10 +322,10 @@ static void ccw_cursor(struct vc_data *vc, struct fb_info *info,
                 kfree(ops->cursor_state.mask);
                 ops->cursor_state.mask = mask;
 
-                p->cursor_shape = vc->vc_cursor_type;
+                ops->p->cursor_shape = vc->vc_cursor_type;
                 cursor.set |= FB_CUR_SETSHAPE;
 
-                switch (p->cursor_shape & CUR_HWMASK) {
+                switch (ops->p->cursor_shape & CUR_HWMASK) {
                 case CUR_NONE:
                         cur_height = 0;
                         break;
diff --git a/drivers/video/console/fbcon_cw.c b/drivers/video/console/fbcon_cw.c
index 6d92b8456206..d44c5fa515fb 100644
--- a/drivers/video/console/fbcon_cw.c
+++ b/drivers/video/console/fbcon_cw.c
@@ -203,19 +203,18 @@ static void cw_clear_margins(struct vc_data *vc, struct fb_info *info,
         }
 }
 
-static void cw_cursor(struct vc_data *vc, struct fb_info *info,
-                      struct display *p, int mode, int softback_lines,
-                      int fg, int bg)
+static void cw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+                      int softback_lines, int fg, int bg)
 {
         struct fb_cursor cursor;
-        struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
+        struct fbcon_ops *ops = info->fbcon_par;
         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
         int w = (vc->vc_font.height + 7) >> 3, c;
-        int y = real_y(p, vc->vc_y);
+        int y = real_y(ops->p, vc->vc_y);
         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
         int err = 1, dx, dy;
         char *src;
-        u32 vxres = GETVXRES(p->scrollmode, info);
+        u32 vxres = GETVXRES(ops->p->scrollmode, info);
 
         if (!ops->fontbuffer)
                 return;
@@ -287,7 +286,7 @@ static void cw_cursor(struct vc_data *vc, struct fb_info *info,
         }
 
         if (cursor.set & FB_CUR_SETSIZE ||
-            vc->vc_cursor_type != p->cursor_shape ||
+            vc->vc_cursor_type != ops->p->cursor_shape ||
             ops->cursor_state.mask == NULL ||
             ops->cursor_reset) {
                 char *tmp, *mask = kmalloc(w*vc->vc_font.width, GFP_ATOMIC);
@@ -307,10 +306,10 @@ static void cw_cursor(struct vc_data *vc, struct fb_info *info,
                 kfree(ops->cursor_state.mask);
                 ops->cursor_state.mask = mask;
 
-                p->cursor_shape = vc->vc_cursor_type;
+                ops->p->cursor_shape = vc->vc_cursor_type;
                 cursor.set |= FB_CUR_SETSHAPE;
 
-                switch (p->cursor_shape & CUR_HWMASK) {
+                switch (ops->p->cursor_shape & CUR_HWMASK) {
                 case CUR_NONE:
                         cur_height = 0;
                         break;
diff --git a/drivers/video/console/fbcon_rotate.c b/drivers/video/console/fbcon_rotate.c
index ec0dd8fe241c..2dc091fbd5c9 100644
--- a/drivers/video/console/fbcon_rotate.c
+++ b/drivers/video/console/fbcon_rotate.c
@@ -18,8 +18,7 @@
 #include "fbcon.h"
 #include "fbcon_rotate.h"
 
-static int fbcon_rotate_font(struct fb_info *info, struct vc_data *vc,
-                             struct display *p)
+static int fbcon_rotate_font(struct fb_info *info, struct vc_data *vc)
 {
         struct fbcon_ops *ops = info->fbcon_par;
         int len, err = 0;
@@ -28,12 +27,12 @@ static int fbcon_rotate_font(struct fb_info *info, struct vc_data *vc,
         u8 *dst;
 
         if (vc->vc_font.data == ops->fontdata &&
-            p->con_rotate == ops->cur_rotate)
+            ops->p->con_rotate == ops->cur_rotate)
                 goto finished;
 
         src = ops->fontdata = vc->vc_font.data;
-        ops->cur_rotate = p->con_rotate;
-        len = (!p->userfont) ? 256 : FNTCHARCNT(src);
+        ops->cur_rotate = ops->p->con_rotate;
+        len = (!ops->p->userfont) ? 256 : FNTCHARCNT(src);
         s_cellsize = ((vc->vc_font.width + 7)/8) *
                 vc->vc_font.height;
         d_cellsize = s_cellsize;
diff --git a/drivers/video/console/fbcon_ud.c b/drivers/video/console/fbcon_ud.c
index 9dd059e8b645..f56ed068a5bc 100644
--- a/drivers/video/console/fbcon_ud.c
+++ b/drivers/video/console/fbcon_ud.c
@@ -249,20 +249,19 @@ static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
         }
 }
 
-static void ud_cursor(struct vc_data *vc, struct fb_info *info,
-                      struct display *p, int mode, int softback_lines,
-                      int fg, int bg)
+static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+                      int softback_lines, int fg, int bg)
 {
         struct fb_cursor cursor;
-        struct fbcon_ops *ops = (struct fbcon_ops *) info->fbcon_par;
+        struct fbcon_ops *ops = info->fbcon_par;
         unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
         int w = (vc->vc_font.width + 7) >> 3, c;
-        int y = real_y(p, vc->vc_y);
+        int y = real_y(ops->p, vc->vc_y);
         int attribute, use_sw = (vc->vc_cursor_type & 0x10);
         int err = 1, dx, dy;
         char *src;
-        u32 vyres = GETVYRES(p->scrollmode, info);
-        u32 vxres = GETVXRES(p->scrollmode, info);
+        u32 vyres = GETVYRES(ops->p->scrollmode, info);
+        u32 vxres = GETVXRES(ops->p->scrollmode, info);
 
         if (!ops->fontbuffer)
                 return;
@@ -334,7 +333,7 @@ static void ud_cursor(struct vc_data *vc, struct fb_info *info,
         }
 
         if (cursor.set & FB_CUR_SETSIZE ||
-            vc->vc_cursor_type != p->cursor_shape ||
+            vc->vc_cursor_type != ops->p->cursor_shape ||
             ops->cursor_state.mask == NULL ||
             ops->cursor_reset) {
                 char *mask = kmalloc(w*vc->vc_font.height, GFP_ATOMIC);
@@ -347,10 +346,10 @@ static void ud_cursor(struct vc_data *vc, struct fb_info *info,
                 kfree(ops->cursor_state.mask);
                 ops->cursor_state.mask = mask;
 
-                p->cursor_shape = vc->vc_cursor_type;
+                ops->p->cursor_shape = vc->vc_cursor_type;
                 cursor.set |= FB_CUR_SETSHAPE;
 
-                switch (p->cursor_shape & CUR_HWMASK) {
+                switch (ops->p->cursor_shape & CUR_HWMASK) {
                 case CUR_NONE:
                         cur_height = 0;
                         break;
diff --git a/drivers/video/console/tileblit.c b/drivers/video/console/tileblit.c
index cb25324a5635..153352ca9461 100644
--- a/drivers/video/console/tileblit.c
+++ b/drivers/video/console/tileblit.c
@@ -80,9 +80,8 @@ static void tile_clear_margins(struct vc_data *vc, struct fb_info *info,
         return;
 }
 
-static void tile_cursor(struct vc_data *vc, struct fb_info *info,
-                        struct display *p, int mode, int softback_lines,
-                        int fg, int bg)
+static void tile_cursor(struct vc_data *vc, struct fb_info *info, int mode,
+                        int softback_lines, int fg, int bg)
 {
         struct fb_tilecursor cursor;
         int use_sw = (vc->vc_cursor_type & 0x01);
@@ -130,10 +129,10 @@ static int tile_update_start(struct fb_info *info)
         return err;
 }
 
-void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info,
-                       struct display *p, struct fbcon_ops *ops)
+void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info)
 {
         struct fb_tilemap map;
+        struct fbcon_ops *ops = info->fbcon_par;
 
         ops->bmove = tile_bmove;
         ops->clear = tile_clear;
@@ -142,13 +141,13 @@ void fbcon_set_tileops(struct vc_data *vc, struct fb_info *info,
         ops->cursor = tile_cursor;
         ops->update_start = tile_update_start;
 
-        if (p) {
+        if (ops->p) {
                 map.width = vc->vc_font.width;
                 map.height = vc->vc_font.height;
                 map.depth = 1;
-                map.length = (p->userfont) ?
-                        FNTCHARCNT(p->fontdata) : 256;
-                map.data = p->fontdata;
+                map.length = (ops->p->userfont) ?
+                        FNTCHARCNT(ops->p->fontdata) : 256;
+                map.data = ops->p->fontdata;
                 info->tileops->fb_settile(info, &map);
         }
 }