diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/devio.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index efe82c968366..e59efea9410f 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1636,7 +1636,10 @@ static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) if (driver == NULL || driver->ioctl == NULL) { retval = -ENOTTY; } else { + /* keep API that guarantees BKL */ + lock_kernel(); retval = driver->ioctl(intf, ctl->ioctl_code, buf); + unlock_kernel(); if (retval == -ENOIOCTLCMD) retval = -ENOTTY; } @@ -1720,11 +1723,9 @@ 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; } @@ -1783,12 +1784,10 @@ 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 @@ -1840,17 +1839,13 @@ 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: @@ -1884,7 +1879,6 @@ 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; |