fbcon: Initialize ops->info early

From: Thierry Reding <[email protected]>

During console takeover, which happens for all DRM/KMS setups using the fbdev helpers, fbcon_startup() is called before fbcon_init() and as a result con2fb_acquire_newinfo() will not be called (info->fbcon_par was set to non-NULL in fbcon_startup()) to assign ops->info.

This causes the cursor_timer_handler() to unreference a NULL pointer.

Avoid this by unconditionally assigning ops->info during fbcon_startup() so that it will be available early, but keep the additional assignment in con2fb_acquire_newinfo() to support console remapping at runtime.

---
 drivers/video/fbdev/core/fbcon.c | 1 +
 1 file changed, 1 insertion(+)

index 3b4a96379128..929ca472c524 100644
@@ -962,6 +962,7 @@ static const char *fbcon_startup(void)
 	ops->graphics = 1;
 	ops->cur_rotate = -1;
 	ops->cur_blink_jiffies = HZ / 5;
+	ops->info = info;
 	info->fbcon_par = ops;
 	if (initial_rotation != -1)
 		p->con_rotate = initial_rotation;

2.14.1

Patch queued for 4.15, thanks.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics