forked from luck/tmp_suning_uos_patched
fb: push down the BKL in the ioctl handler
Framebuffer is heavily BKL dependant at the moment so just wrap the ioctl handler in the driver as we push down. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Alan Cox <alan@redhat.com> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox
Linus Torvalds
parent
978ccaa8ea
commit
e53677113e
@ -1002,101 +1002,132 @@ fb_blank(struct fb_info *info, int blank)
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return ret;
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}
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static int
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fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
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static long
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fb_ioctl(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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struct inode *inode = file->f_path.dentry->d_inode;
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int fbidx = iminor(inode);
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struct fb_info *info = registered_fb[fbidx];
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struct fb_ops *fb = info->fbops;
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struct fb_info *info;
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struct fb_ops *fb;
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struct fb_var_screeninfo var;
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struct fb_fix_screeninfo fix;
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struct fb_con2fbmap con2fb;
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struct fb_cmap_user cmap;
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struct fb_event event;
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void __user *argp = (void __user *)arg;
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int i;
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long ret = 0;
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if (!fb)
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lock_kernel();
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info = registered_fb[fbidx];
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fb = info->fbops;
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if (!fb) {
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unlock_kernel();
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return -ENODEV;
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}
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switch (cmd) {
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case FBIOGET_VSCREENINFO:
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return copy_to_user(argp, &info->var,
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ret = copy_to_user(argp, &info->var,
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sizeof(var)) ? -EFAULT : 0;
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break;
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case FBIOPUT_VSCREENINFO:
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if (copy_from_user(&var, argp, sizeof(var)))
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return -EFAULT;
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if (copy_from_user(&var, argp, sizeof(var))) {
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ret = -EFAULT;
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break;
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}
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acquire_console_sem();
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info->flags |= FBINFO_MISC_USEREVENT;
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i = fb_set_var(info, &var);
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ret = fb_set_var(info, &var);
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info->flags &= ~FBINFO_MISC_USEREVENT;
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release_console_sem();
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if (i) return i;
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if (copy_to_user(argp, &var, sizeof(var)))
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return -EFAULT;
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return 0;
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if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
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ret = -EFAULT;
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break;
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case FBIOGET_FSCREENINFO:
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return copy_to_user(argp, &info->fix,
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ret = copy_to_user(argp, &info->fix,
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sizeof(fix)) ? -EFAULT : 0;
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break;
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case FBIOPUTCMAP:
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if (copy_from_user(&cmap, argp, sizeof(cmap)))
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return -EFAULT;
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return (fb_set_user_cmap(&cmap, info));
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ret = -EFAULT;
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else
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ret = fb_set_user_cmap(&cmap, info);
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break;
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case FBIOGETCMAP:
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if (copy_from_user(&cmap, argp, sizeof(cmap)))
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return -EFAULT;
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return fb_cmap_to_user(&info->cmap, &cmap);
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ret = -EFAULT;
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else
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ret = fb_cmap_to_user(&info->cmap, &cmap);
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break;
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case FBIOPAN_DISPLAY:
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if (copy_from_user(&var, argp, sizeof(var)))
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return -EFAULT;
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if (copy_from_user(&var, argp, sizeof(var))) {
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ret = -EFAULT;
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break;
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}
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acquire_console_sem();
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i = fb_pan_display(info, &var);
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ret = fb_pan_display(info, &var);
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release_console_sem();
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if (i)
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return i;
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if (copy_to_user(argp, &var, sizeof(var)))
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return -EFAULT;
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return 0;
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if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
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ret = -EFAULT;
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break;
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case FBIO_CURSOR:
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return -EINVAL;
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ret = -EINVAL;
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break;
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case FBIOGET_CON2FBMAP:
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if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
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return -EFAULT;
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if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
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return -EINVAL;
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ret = -EFAULT;
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else if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
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ret = -EINVAL;
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else {
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con2fb.framebuffer = -1;
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event.info = info;
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event.data = &con2fb;
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fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
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return copy_to_user(argp, &con2fb,
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fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP,
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&event);
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ret = copy_to_user(argp, &con2fb,
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sizeof(con2fb)) ? -EFAULT : 0;
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}
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break;
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case FBIOPUT_CON2FBMAP:
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if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
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return - EFAULT;
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if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
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return -EINVAL;
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if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
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return -EINVAL;
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if (copy_from_user(&con2fb, argp, sizeof(con2fb))) {
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ret = -EFAULT;
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break;
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}
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if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) {
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ret = -EINVAL;
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break;
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}
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if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) {
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ret = -EINVAL;
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break;
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}
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if (!registered_fb[con2fb.framebuffer])
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request_module("fb%d", con2fb.framebuffer);
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if (!registered_fb[con2fb.framebuffer])
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return -EINVAL;
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if (!registered_fb[con2fb.framebuffer]) {
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ret = -EINVAL;
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break;
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}
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event.info = info;
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event.data = &con2fb;
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return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP,
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ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP,
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&event);
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break;
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case FBIOBLANK:
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acquire_console_sem();
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info->flags |= FBINFO_MISC_USEREVENT;
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i = fb_blank(info, arg);
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ret = fb_blank(info, arg);
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info->flags &= ~FBINFO_MISC_USEREVENT;
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release_console_sem();
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return i;
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break;;
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default:
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if (fb->fb_ioctl == NULL)
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return -EINVAL;
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return fb->fb_ioctl(info, cmd, arg);
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ret = -ENOTTY;
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else
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ret = fb->fb_ioctl(info, cmd, arg);
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}
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unlock_kernel();
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return ret;
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}
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#ifdef CONFIG_COMPAT
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@ -1150,7 +1181,7 @@ static int fb_getput_cmap(struct inode *inode, struct file *file,
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put_user(compat_ptr(data), &cmap->transp))
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return -EFAULT;
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err = fb_ioctl(inode, file, cmd, (unsigned long) cmap);
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err = fb_ioctl(file, cmd, (unsigned long) cmap);
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if (!err) {
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if (copy_in_user(&cmap32->start,
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@ -1204,7 +1235,7 @@ static int fb_get_fscreeninfo(struct inode *inode, struct file *file,
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old_fs = get_fs();
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set_fs(KERNEL_DS);
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err = fb_ioctl(inode, file, cmd, (unsigned long) &fix);
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err = fb_ioctl(file, cmd, (unsigned long) &fix);
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set_fs(old_fs);
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if (!err)
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@ -1231,7 +1262,7 @@ fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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case FBIOPUT_CON2FBMAP:
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arg = (unsigned long) compat_ptr(arg);
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case FBIOBLANK:
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ret = fb_ioctl(inode, file, cmd, arg);
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ret = fb_ioctl(file, cmd, arg);
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break;
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case FBIOGET_FSCREENINFO:
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@ -1358,7 +1389,7 @@ static const struct file_operations fb_fops = {
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.owner = THIS_MODULE,
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.read = fb_read,
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.write = fb_write,
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.ioctl = fb_ioctl,
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.unlocked_ioctl = fb_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = fb_compat_ioctl,
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#endif
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