Re: [PATCH v2 1/1] fbdev/core: Disable console-lock warnings when fb.lockless_register_fb is set

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Hi,

On 18-07-18 11:30, Thomas Zimmermann wrote:
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.

v2:
	- restore ignore_console_lock_warning if lock_fb_info() fails

Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>

Patch looks good to me, thanks:

Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>

For "[PATCH v2] console: Replace #if 1 with a bool to ignore"
Petr wrote:

"Acked-by: Petr Mladek <pmladek@xxxxxxxx>

I assume that it will go via fbdev tree with the other changes
unless I hear otherwise."

So that patch and this one can both be picked up by Bartlomiej for
merging through the fbdev tree when he is back.

Regards,

Hans





---
  drivers/video/fbdev/core/fbmem.c | 15 +++++++++++----
  1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index 9e2f9d3c760e..432c26eeabfb 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1627,6 +1627,7 @@ static int do_register_framebuffer(struct fb_info *fb_info)
  	int i, ret;
  	struct fb_event event;
  	struct fb_videomode mode;
+	bool saved_ignore_console_lock_warning = ignore_console_lock_warning;
if (fb_check_foreignness(fb_info))
  		return -ENOSYS;
@@ -1691,17 +1692,23 @@ static int do_register_framebuffer(struct fb_info *fb_info)
  	event.info = fb_info;
  	if (!lockless_register_fb)
  		console_lock();
+	else
+		ignore_console_lock_warning = true;
  	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
+		ignore_console_lock_warning =
+			saved_ignore_console_lock_warning;
+	return ret;
  }
static int do_unregister_framebuffer(struct fb_info *fb_info)

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