USB: autoconvert trivial BKL users to private mutex

[pandora-kernel.git] / drivers / usb / misc / usblcd.c

diff --git a/drivers/usb/misc/usblcd.c b/drivers/usb/misc/usblcd.c
index 7828c76..6ae39e3 100644 (file)
--- a/drivers/usb/misc/usblcd.c
+++ b/drivers/usb/misc/usblcd.c
@@ -16,7 +16,6 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/slab.h>
-#include <linux/smp_lock.h>
 #include <linux/errno.h>
 #include <linux/mutex.h>
 #include <asm/uaccess.h>
@@ -30,6 +29,7 @@
 #define IOCTL_GET_DRV_VERSION  2
 
 
+static DEFINE_MUTEX(lcd_mutex);
 static const struct usb_device_id id_table[] = {
        { .idVendor = 0x10D2, .match_flags = USB_DEVICE_ID_MATCH_VENDOR, },
        { },
@@ -74,12 +74,12 @@ static int lcd_open(struct inode *inode, struct file *file)
        struct usb_interface *interface;
        int subminor, r;
 
-       lock_kernel();
+       mutex_lock(&lcd_mutex);
        subminor = iminor(inode);
 
        interface = usb_find_interface(&lcd_driver, subminor);
        if (!interface) {
-               unlock_kernel();
+               mutex_unlock(&lcd_mutex);
                err ("USBLCD: %s - error, can't find device for minor %d",
                     __func__, subminor);
                return -ENODEV;
@@ -89,7 +89,7 @@ static int lcd_open(struct inode *inode, struct file *file)
        dev = usb_get_intfdata(interface);
        if (!dev) {
                mutex_unlock(&open_disc_mutex);
-               unlock_kernel();
+               mutex_unlock(&lcd_mutex);
                return -ENODEV;
        }
 
@@ -101,13 +101,13 @@ static int lcd_open(struct inode *inode, struct file *file)
        r = usb_autopm_get_interface(interface);
        if (r < 0) {
                kref_put(&dev->kref, lcd_delete);
-               unlock_kernel();
+               mutex_unlock(&lcd_mutex);
                return r;
        }
 
        /* save our object in the file's private structure */
        file->private_data = dev;
-       unlock_kernel();
+       mutex_unlock(&lcd_mutex);
 
        return 0;
 }
@@ -164,14 +164,14 @@ static long lcd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
        
        switch (cmd) {
        case IOCTL_GET_HARD_VERSION:
-               lock_kernel();
+               mutex_lock(&lcd_mutex);
                bcdDevice = le16_to_cpu((dev->udev)->descriptor.bcdDevice);
                sprintf(buf,"%1d%1d.%1d%1d",
                        (bcdDevice & 0xF000)>>12,
                        (bcdDevice & 0xF00)>>8,
                        (bcdDevice & 0xF0)>>4,
                        (bcdDevice & 0xF));
-               unlock_kernel();
+               mutex_unlock(&lcd_mutex);
                if (copy_to_user((void __user *)arg,buf,strlen(buf))!=0)
                        return -EFAULT;
                break;