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Commit 9c8db4a2 authored by Krzysztof Helt's avatar Krzysztof Helt Committed by Linus Torvalds
Browse files

vga16fb: remove open_lock mutex 



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

Signed-off-by: default avatarKrzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0716a8ea

drivers/video/vga16fb.c

+2 −9
Original line number Diff line number Diff line
@@ -58,7 +58,6 @@ struct vga16fb_par { 
		unsigned char	ClockingMode;	  /* Seq-Controller:01h */

	} vga_state;

	struct vgastate state;

	struct mutex open_lock;

	unsigned int ref_count;

	int palette_blanked, vesa_blanked, mode, isVGA;

	u8 misc, pel_msk, vss, clkdiv;
@@ -286,7 +285,6 @@ static int vga16fb_open(struct fb_info *info, int user) 
{

	struct vga16fb_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_FONTS | VGA_SAVE_MODE |
@@ -294,7 +292,6 @@ static int vga16fb_open(struct fb_info *info, int user) 
		save_vga(&par->state);

	}

	par->ref_count++;

	mutex_unlock(&par->open_lock);



	return 0;

}
@@ -303,15 +300,12 @@ static int vga16fb_release(struct fb_info *info, int user) 
{

	struct vga16fb_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;

}
@@ -1326,7 +1320,6 @@ static int __init vga16fb_probe(struct platform_device *dev) 
	printk(KERN_INFO "vga16fb: mapped to 0x%p\n", info->screen_base);

	par = info->par;



	mutex_init(&par->open_lock);

	par->isVGA = screen_info.orig_video_isVGA;

	par->palette_blanked = 0;

	par->vesa_blanked = 0;