From: Thomas Zimmermann <tzimmermann@xxxxxxx>
[ Upstream commit 3f2ce54284a60500eb6dca1dca6fd615df8f9aa3 ]
If the console is unlocked during registration, the console subsystem
generates significant amounts of warnings, which obfuscate actual
debugging messages. Setting ignore_console_lock_warning while debugging
console registration avoid the noise.
v3:
- manipulate ignore_console_lock_warning with atomic_{inc,dec}
v2:
- restore ignore_console_lock_warning if lock_fb_info() fails
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Acked-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Reviewed-by: Petr Mladek <pmladek@xxxxxxxx>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Cc: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
drivers/video/fbdev/core/fbmem.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index f741ba8df01b..cd659f862d74 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1703,17 +1703,22 @@ static int do_register_framebuffer(struct fb_info *fb_info)
event.info = fb_info;
if (!lockless_register_fb)
console_lock();
+ else
+ atomic_inc(&ignore_console_lock_warning);
if (!lock_fb_info(fb_info)) {
- if (!lockless_register_fb)
- console_unlock();
- return -ENODEV;
+ ret = -ENODEV;
+ goto unlock_console;
}
+ ret = 0;
fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
unlock_fb_info(fb_info);
+unlock_console:
if (!lockless_register_fb)
console_unlock();
- return 0;
+ else
+ atomic_dec(&ignore_console_lock_warning);
+ return ret;
}
static int do_unregister_framebuffer(struct fb_info *fb_info)
--
2.17.1
