提交 01412a21 编写于 作者: O Oliver Neukum 提交者: Greg Kroah-Hartman

USB: Reduce scope of BKL in usb ioctl handling

This pushes BKL down in ioctl handling and drops it
for some important ioctls
Signed-off-by: NOliver Neukum <oliver@neukum.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
上级 86266452
......@@ -1719,9 +1719,12 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
if (!(file->f_mode & FMODE_WRITE))
return -EPERM;
lock_kernel();
usb_lock_device(dev);
if (!connected(ps)) {
usb_unlock_device(dev);
unlock_kernel();
return -ENODEV;
}
......@@ -1780,10 +1783,12 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
break;
case USBDEVFS_SUBMITURB:
unlock_kernel();
snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
ret = proc_submiturb(ps, p);
if (ret >= 0)
inode->i_mtime = CURRENT_TIME;
lock_kernel();
break;
#ifdef CONFIG_COMPAT
......@@ -1835,13 +1840,17 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
break;
case USBDEVFS_REAPURB:
unlock_kernel();
snoop(&dev->dev, "%s: REAPURB\n", __func__);
ret = proc_reapurb(ps, p);
lock_kernel();
break;
case USBDEVFS_REAPURBNDELAY:
unlock_kernel();
snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
ret = proc_reapurbnonblock(ps, p);
lock_kernel();
break;
case USBDEVFS_DISCSIGNAL:
......@@ -1875,6 +1884,7 @@ static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
break;
}
usb_unlock_device(dev);
unlock_kernel();
if (ret >= 0)
inode->i_atime = CURRENT_TIME;
return ret;
......@@ -1885,9 +1895,7 @@ static long usbdev_ioctl(struct file *file, unsigned int cmd,
{
int ret;
lock_kernel();
ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
unlock_kernel();
return ret;
}
......@@ -1898,9 +1906,7 @@ static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
{
int ret;
lock_kernel();
ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
unlock_kernel();
return ret;
}
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册