aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/core/devio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/core/devio.c')
-rw-r--r--drivers/usb/core/devio.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index d8b0476237f..e84f19d4089 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -90,9 +90,10 @@ MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
#define MAX_USBFS_BUFFER_SIZE 16384
-static inline int connected (struct usb_device *dev)
+static inline int connected (struct dev_state *ps)
{
- return dev->state != USB_STATE_NOTATTACHED;
+ return (!list_empty(&ps->list) &&
+ ps->dev->state != USB_STATE_NOTATTACHED);
}
static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
@@ -130,7 +131,7 @@ static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, l
pos = *ppos;
usb_lock_device(dev);
- if (!connected(dev)) {
+ if (!connected(ps)) {
ret = -ENODEV;
goto err;
} else if (pos < 0) {
@@ -1326,7 +1327,7 @@ static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
}
}
- if (!connected(ps->dev)) {
+ if (!connected(ps)) {
kfree(buf);
return -ENODEV;
}
@@ -1425,7 +1426,7 @@ static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd
if (!(file->f_mode & FMODE_WRITE))
return -EPERM;
usb_lock_device(dev);
- if (!connected(dev)) {
+ if (!connected(ps)) {
usb_unlock_device(dev);
return -ENODEV;
}
@@ -1566,7 +1567,7 @@ static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wai
poll_wait(file, &ps->wait, wait);
if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
mask |= POLLOUT | POLLWRNORM;
- if (!connected(ps->dev))
+ if (!connected(ps))
mask |= POLLERR | POLLHUP;
return mask;
}