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authorOliver Neukum <oliver@neukum.org>2010-01-13 15:33:15 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2010-03-02 14:54:23 -0800
commit86266452f80545285c14e20a8024f79c4fb88a86 (patch)
treeebb0a287f9bf189737d4924536d18b36492fd330 /drivers/usb/class
parentf9de332ebf9df71892d52f7eb64af101a647349f (diff)
USB: Push BKL on open down into the drivers
Straightforward push into the drivers to allow auditing individual drivers separately Signed-off-by: Oliver Neukum <oliver@neukum.org> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Cc: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/class')
-rw-r--r--drivers/usb/class/cdc-wdm.c3
-rw-r--r--drivers/usb/class/usblp.c3
-rw-r--r--drivers/usb/class/usbtmc.c3
3 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 18aafcb08fc..b75a3d8bb02 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -19,6 +19,7 @@
#include <linux/uaccess.h>
#include <linux/bitops.h>
#include <linux/poll.h>
+#include <linux/smp_lock.h>
#include <linux/usb.h>
#include <linux/usb/cdc.h>
#include <asm/byteorder.h>
@@ -516,6 +517,7 @@ static int wdm_open(struct inode *inode, struct file *file)
struct usb_interface *intf;
struct wdm_device *desc;
+ lock_kernel();
mutex_lock(&wdm_mutex);
intf = usb_find_interface(&wdm_driver, minor);
if (!intf)
@@ -548,6 +550,7 @@ static int wdm_open(struct inode *inode, struct file *file)
usb_autopm_put_interface(desc->intf);
out:
mutex_unlock(&wdm_mutex);
+ unlock_kernel();
return rv;
}
diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c
index 93b5f85d7ce..d53f9499f93 100644
--- a/drivers/usb/class/usblp.c
+++ b/drivers/usb/class/usblp.c
@@ -56,6 +56,7 @@
#include <linux/slab.h>
#include <linux/lp.h>
#include <linux/mutex.h>
+#include <linux/smp_lock.h>
#undef DEBUG
#include <linux/usb.h>
@@ -395,6 +396,7 @@ static int usblp_open(struct inode *inode, struct file *file)
if (minor < 0)
return -ENODEV;
+ lock_kernel();
mutex_lock (&usblp_mutex);
retval = -ENODEV;
@@ -434,6 +436,7 @@ static int usblp_open(struct inode *inode, struct file *file)
}
out:
mutex_unlock (&usblp_mutex);
+ unlock_kernel();
return retval;
}
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 8588c0937a8..426bfc72b9b 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -26,6 +26,7 @@
#include <linux/uaccess.h>
#include <linux/kref.h>
#include <linux/mutex.h>
+#include <linux/smp_lock.h>
#include <linux/usb.h>
#include <linux/usb/tmc.h>
@@ -113,6 +114,7 @@ static int usbtmc_open(struct inode *inode, struct file *filp)
struct usbtmc_device_data *data;
int retval = 0;
+ lock_kernel();
intf = usb_find_interface(&usbtmc_driver, iminor(inode));
if (!intf) {
printk(KERN_ERR KBUILD_MODNAME
@@ -128,6 +130,7 @@ static int usbtmc_open(struct inode *inode, struct file *filp)
filp->private_data = data;
exit:
+ unlock_kernel();
return retval;
}