#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
+#include <linux/mutex.h>
#include "usbvideo.h"
// #define VICAM_DEBUG
struct usb_device *udev; // usb device
/* guard against simultaneous accesses to the camera */
- struct semaphore cam_lock;
+ struct mutex cam_lock;
int is_initialized;
u8 open_count;
u16 size)
{
int status = -ENODEV;
- down(&cam->cam_lock);
+ mutex_lock(&cam->cam_lock);
if (cam->udev) {
status = __send_control_msg(cam, request, value,
index, cp, size);
}
- up(&cam->cam_lock);
+ mutex_unlock(&cam->cam_lock);
return status;
}
static int
if (!cam) {
printk(KERN_ERR
"vicam video_device improperly initialized");
+ return -EINVAL;
}
/* the videodev_lock held above us protects us from
rvfree(cam->framebuf, VICAM_MAX_FRAME_SIZE * VICAM_FRAMES);
kfree(cam->cntrlbuf);
- down(&cam->cam_lock);
+ mutex_lock(&cam->cam_lock);
cam->open_count--;
open_count = cam->open_count;
udev = cam->udev;
- up(&cam->cam_lock);
+ mutex_unlock(&cam->cam_lock);
if (!open_count && !udev) {
kfree(cam);
request[8] = 0;
// bytes 9-15 do not seem to affect exposure or image quality
- down(&cam->cam_lock);
+ mutex_lock(&cam->cam_lock);
if (!cam->udev) {
goto done;
}
done:
- up(&cam->cam_lock);
+ mutex_unlock(&cam->cam_lock);
}
static ssize_t
.read = vicam_read,
.mmap = vicam_mmap,
.ioctl = vicam_ioctl,
+ .compat_ioctl = v4l_compat_ioctl32,
.llseek = no_llseek,
};
MODULE_DEVICE_TABLE(usb, vicam_table);
static struct usb_driver vicam_driver = {
- .owner = THIS_MODULE,
.name = "vicam",
.probe = vicam_probe,
.disconnect = vicam_disconnect,
cam->shutter_speed = 15;
- init_MUTEX(&cam->cam_lock);
+ mutex_init(&cam->cam_lock);
memcpy(&cam->vdev, &vicam_template,
sizeof (vicam_template));
/* stop the camera from being used */
- down(&cam->cam_lock);
+ mutex_lock(&cam->cam_lock);
/* mark the camera as gone */
open_count = cam->open_count;
- up(&cam->cam_lock);
+ mutex_unlock(&cam->cam_lock);
if (!open_count) {
kfree(cam);