diff options
Diffstat (limited to 'drivers/usb/misc/iowarrior.c')
| -rw-r--r-- | drivers/usb/misc/iowarrior.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c index 7dc9d3c..2de49c8 100644 --- a/drivers/usb/misc/iowarrior.c +++ b/drivers/usb/misc/iowarrior.c @@ -18,7 +18,7 @@ #include <linux/init.h> #include <linux/slab.h> #include <linux/sched.h> -#include <linux/smp_lock.h> +#include <linux/mutex.h> #include <linux/poll.h> #include <linux/usb/iowarrior.h> @@ -61,6 +61,7 @@ MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); /* Module parameters */ +static DEFINE_MUTEX(iowarrior_mutex); static int debug = 0; module_param(debug, bool, 0644); MODULE_PARM_DESC(debug, "debug=1 enables debugging messages"); @@ -282,7 +283,7 @@ static ssize_t iowarrior_read(struct file *file, char __user *buffer, int read_idx; int offset; - dev = (struct iowarrior *)file->private_data; + dev = file->private_data; /* verify that the device wasn't unplugged */ if (dev == NULL || !dev->present) @@ -348,7 +349,7 @@ static ssize_t iowarrior_write(struct file *file, char *buf = NULL; /* for IOW24 and IOW56 we need a buffer */ struct urb *int_out_urb = NULL; - dev = (struct iowarrior *)file->private_data; + dev = file->private_data; mutex_lock(&dev->mutex); /* verify that the device wasn't unplugged */ @@ -483,7 +484,7 @@ static long iowarrior_ioctl(struct file *file, unsigned int cmd, int retval; int io_res; /* checks for bytes read/written and copy_to/from_user results */ - dev = (struct iowarrior *)file->private_data; + dev = file->private_data; if (dev == NULL) { return -ENODEV; } @@ -493,7 +494,7 @@ static long iowarrior_ioctl(struct file *file, unsigned int cmd, return -ENOMEM; /* lock this object */ - lock_kernel(); + mutex_lock(&iowarrior_mutex); mutex_lock(&dev->mutex); /* verify that the device wasn't unplugged */ @@ -585,7 +586,7 @@ static long iowarrior_ioctl(struct file *file, unsigned int cmd, error_out: /* unlock the device */ mutex_unlock(&dev->mutex); - unlock_kernel(); + mutex_unlock(&iowarrior_mutex); kfree(buffer); return retval; } @@ -602,12 +603,12 @@ static int iowarrior_open(struct inode *inode, struct file *file) dbg("%s", __func__); - lock_kernel(); + mutex_lock(&iowarrior_mutex); subminor = iminor(inode); interface = usb_find_interface(&iowarrior_driver, subminor); if (!interface) { - unlock_kernel(); + mutex_unlock(&iowarrior_mutex); err("%s - error, can't find device for minor %d", __func__, subminor); return -ENODEV; @@ -617,7 +618,7 @@ static int iowarrior_open(struct inode *inode, struct file *file) dev = usb_get_intfdata(interface); if (!dev) { mutex_unlock(&iowarrior_open_disc_lock); - unlock_kernel(); + mutex_unlock(&iowarrior_mutex); return -ENODEV; } @@ -644,7 +645,7 @@ static int iowarrior_open(struct inode *inode, struct file *file) out: mutex_unlock(&dev->mutex); - unlock_kernel(); + mutex_unlock(&iowarrior_mutex); return retval; } @@ -656,7 +657,7 @@ static int iowarrior_release(struct inode *inode, struct file *file) struct iowarrior *dev; int retval = 0; - dev = (struct iowarrior *)file->private_data; + dev = file->private_data; if (dev == NULL) { return -ENODEV; } |