[v3,2/3] fbcon: Call WARN_CONSOLE_UNLOCKED() where applicable

Commit Message

Hans de Goede June 26, 2018, 6:36 p.m. UTC

Replace comments about places where the console lock should be held with
calls to WARN_CONSOLE_UNLOCKED() to assert that it is actually held.

Reviewed-by: Daniel Vetter <[e-mail]>
Signed-off-by: Hans de Goede <[e-mail]>
---
Changes in v3:
-New patch in v3 of this patchset

Changes in v4:
-Keep the comments about which fbcon functions need locks in place
---
 drivers/video/fbdev/core/fbcon.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

Comments

Sergey Senozhatsky June 27, 2018, 1:09 a.m. UTC | #1

On (06/26/18 20:36), Hans de Goede wrote:
> Replace comments about places where the console lock should be held with
> calls to WARN_CONSOLE_UNLOCKED() to assert that it is actually held.
> 
> Reviewed-by: Daniel Vetter <[e-mail]>
> Signed-off-by: Hans de Goede <[e-mail]>

Reviewed-by: Sergey Senozhatsky <[e-mail]>

	-ss
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Patch

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index c910e74d46ff..cd8d52a967aa 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -828,6 +828,8 @@  static int set_con2fb_map(int unit, int newidx, int user)
 	struct fb_info *oldinfo = NULL;
  	int found, err = 0;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	if (oldidx == newidx)
 		return 0;
 
@@ -3044,6 +3046,8 @@  static int fbcon_fb_unbind(int idx)
 {
 	int i, new_idx = -1, ret = 0;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	if (!fbcon_has_console_bind)
 		return 0;
 
@@ -3094,6 +3098,8 @@  static int fbcon_fb_unregistered(struct fb_info *info)
 {
 	int i, idx;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	idx = info->node;
 	for (i = first_fb_vc; i <= last_fb_vc; i++) {
 		if (con2fb_map[i] == idx)
@@ -3131,6 +3137,9 @@  static int fbcon_fb_unregistered(struct fb_info *info)
 static void fbcon_remap_all(int idx)
 {
 	int i;
+
+	WARN_CONSOLE_UNLOCKED();
+
 	for (i = first_fb_vc; i <= last_fb_vc; i++)
 		set_con2fb_map(i, idx, 0);
 
@@ -3177,6 +3186,8 @@  static int fbcon_fb_registered(struct fb_info *info)
 {
 	int ret = 0, i, idx;
 
+	WARN_CONSOLE_UNLOCKED();
+
 	idx = info->node;
 	fbcon_select_primary(info);