From 2a9d0083f63da961a8cd4fdf9f4e8e6433c36966 Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Thu, 14 Jan 2010 16:23:56 +0100 Subject: [PATCH] USB: BKL removal from ioctl path of usbfs Total removal from the ioctl code path except for the outcall to external modules. Locking is ensured by the normal locks of usbfs. Signed-off-by: Oliver Neukum Cc: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/devio.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index efe82c96836..e59efea9410 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; -- 2.39.3