xiaomi-sm8450/android_kernel_xiaomi_sm8450
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USB: Push BKL on open down into the drivers

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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>
This commit is contained in:
Oliver Neukum
2010-01-13 15:33:15 +01:00
committed by Greg Kroah-Hartman
parent f9de332ebf
commit 86266452f8
20 changed files with 99 additions and 15 deletions
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8
drivers/usb/misc/idmouse.c
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@@ -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;
}