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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/misc/idmouse.c
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/misc/idmouse.c')
-rw-r--r--drivers/usb/misc/idmouse.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/misc/idmouse.c b/drivers/usb/misc/idmouse.c
index a54c3cb804c..68df9ac7669 100644
--- a/drivers/usb/misc/idmouse.c
+++ b/drivers/usb/misc/idmouse.c
@@ -24,6 +24,7 @@
#include <linux/module.h>
#include <linux/completion.h>
#include <linux/mutex.h>
+#include <linux/smp_lock.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
@@ -226,16 +227,20 @@ static int idmouse_open(struct inode *inode, struct file *file)
struct usb_interface *interface;
int result;
+ lock_kernel();
/* get the interface from minor number and driver information */
interface = usb_find_interface (&idmouse_driver, iminor (inode));
- if (!interface)
+ if (!interface) {
+ unlock_kernel();
return -ENODEV;
+ }
mutex_lock(&open_disc_mutex);
/* get the device information block from the interface */
dev = usb_get_intfdata(interface);
if (!dev) {
mutex_unlock(&open_disc_mutex);
+ unlock_kernel();
return -ENODEV;
}
@@ -272,6 +277,7 @@ error:
/* unlock this device */
mutex_unlock(&dev->lock);
+ unlock_kernel();
return result;
}