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vga16fb: remove open_lock mutex

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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>
This commit is contained in:
Krzysztof Helt 2008-10-15 22:03:33 -07:00 committed by Linus Torvalds
parent 0716a8eab3
commit 9c8db4a265
1 changed files with 2 additions and 9 deletions
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11
drivers/video/vga16fb.c
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@ -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;