diff options
Diffstat (limited to 'drivers/usb/class/cdc-wdm.c')
| -rw-r--r-- | drivers/usb/class/cdc-wdm.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c index 122d056d96d..8a230f0ef77 100644 --- a/drivers/usb/class/cdc-wdm.c +++ b/drivers/usb/class/cdc-wdm.c @@ -13,6 +13,7 @@ */ #include <linux/kernel.h> #include <linux/errno.h> +#include <linux/ioctl.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/mutex.h> @@ -644,6 +645,22 @@ static int wdm_release(struct inode *inode, struct file *file) return 0; } +static long wdm_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + struct wdm_device *desc = file->private_data; + int rv = 0; + + switch (cmd) { + case IOCTL_WDM_MAX_COMMAND: + if (copy_to_user((void __user *)arg, &desc->wMaxCommand, sizeof(desc->wMaxCommand))) + rv = -EFAULT; + break; + default: + rv = -ENOTTY; + } + return rv; +} + static const struct file_operations wdm_fops = { .owner = THIS_MODULE, .read = wdm_read, @@ -652,6 +669,8 @@ static const struct file_operations wdm_fops = { .flush = wdm_flush, .release = wdm_release, .poll = wdm_poll, + .unlocked_ioctl = wdm_ioctl, + .compat_ioctl = wdm_ioctl, .llseek = noop_llseek, }; |