# \[PATCH\] pxafb: do console locking before calling fb\_blank()

- From: Vasily Khoruzhick \<anarsoul@gmail.com\>
- Date: 2012-02-26 13:52:02 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2012/02/8598211
- Thread: https://ratatoskr.run/linux-arm-kernel/2012/02/8598211/t.md

```text
Otherwise we hit WARN_CONSOLE_UNLOCKED in do_unblank_screen

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
---
 drivers/video/pxafb.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index 1d1e4f1..c176561 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -54,6 +54,7 @@
 #include <linux/mutex.h>
 #include <linux/kthread.h>
 #include <linux/freezer.h>
+#include <linux/console.h>
 
 #include <mach/hardware.h>
 #include <asm/io.h>
@@ -730,9 +731,12 @@ static int overlayfb_open(struct fb_info *info, int user)
 	if (user = 0)
 		return -ENODEV;
 
-	if (ofb->usage++ = 0)
+	if (ofb->usage++ = 0) {
 		/* unblank the base framebuffer */
+		console_lock();
 		fb_blank(&ofb->fbi->fb, FB_BLANK_UNBLANK);
+		console_unlock();
+	}
 
 	return 0;
 }
-- 
1.7.9.2

```