From 9c8db4a265ee5000d8c21634277ec1eb9ceebc7f Mon Sep 17 00:00:00 2001 From: Krzysztof Helt Date: Wed, 15 Oct 2008 22:03:33 -0700 Subject: [PATCH] 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: Krzysztof Helt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/vga16fb.c | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-) diff --git a/drivers/video/vga16fb.c b/drivers/video/vga16fb.c index e31bca8a0cb2..5b2938903ac2 100644 --- a/drivers/video/vga16fb.c +++ b/drivers/video/vga16fb.c @@ -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; -- 2.20.1