neofb: remove open_lock mutex

Remove mutex from the fb_open/fb_release functions as these operations are
mutexed at fb layer.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/neofb.c

diff --git a/drivers/video/neofb.c b/drivers/video/neofb.c
index dea8645..bfb802d 100644
--- a/drivers/video/neofb.c
+++ b/drivers/video/neofb.c
@@ -557,14 +557,12 @@
 {
 	struct neofb_par *par = info->par;
 
-	mutex_lock(&par->open_lock);
 	if (!par->ref_count) {
 		memset(&par->state, 0, sizeof(struct vgastate));
 		par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS;
 		save_vga(&par->state);
 	}
 	par->ref_count++;
-	mutex_unlock(&par->open_lock);
 
 	return 0;
 }
@@ -574,16 +572,13 @@
 {
 	struct neofb_par *par = info->par;
 
-	mutex_lock(&par->open_lock);
-	if (!par->ref_count) {
-		mutex_unlock(&par->open_lock);
+	if (!par->ref_count)
 		return -EINVAL;
-	}
+
 	if (par->ref_count == 1) {
 		restore_vga(&par->state);
 	}
 	par->ref_count--;
-	mutex_unlock(&par->open_lock);
 
 	return 0;
 }
@@ -1958,7 +1953,6 @@
 
 	info->fix.accel = id->driver_data;
 
-	mutex_init(&par->open_lock);
 	par->pci_burst = !nopciburst;
 	par->lcd_stretch = !nostretch;
 	par->libretto = libretto;

include/video/neomagic.h

diff --git a/include/video/neomagic.h b/include/video/neomagic.h
index 38910da..08b6637 100644
--- a/include/video/neomagic.h
+++ b/include/video/neomagic.h
@@ -123,7 +123,6 @@
 
 struct neofb_par {
 	struct vgastate state;
-	struct mutex open_lock;
 	unsigned int ref_count;
 
 	unsigned char MiscOutReg;	/* Misc */