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path: root/drivers/usb/serial/usb-serial.c
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Diffstat (limited to 'drivers/usb/serial/usb-serial.c')
-rw-r--r--drivers/usb/serial/usb-serial.c20
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index cfcfd5ab06ce..742a5bc44be8 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -204,6 +204,11 @@ static int serial_open (struct tty_struct *tty, struct file *filp)
goto bailout_kref_put;
}
+ if (port->serial->disconnected) {
+ retval = -ENODEV;
+ goto bailout_kref_put;
+ }
+
if (mutex_lock_interruptible(&port->mutex)) {
retval = -ERESTARTSYS;
goto bailout_kref_put;
@@ -1067,6 +1072,8 @@ int usb_serial_suspend(struct usb_interface *intf, pm_message_t message)
struct usb_serial_port *port;
int i, r = 0;
+ serial->suspending = 1;
+
for (i = 0; i < serial->num_ports; ++i) {
port = serial->port[i];
if (port)
@@ -1083,10 +1090,15 @@ EXPORT_SYMBOL(usb_serial_suspend);
int usb_serial_resume(struct usb_interface *intf)
{
struct usb_serial *serial = usb_get_intfdata(intf);
+ int rv;
+ serial->suspending = 0;
if (serial->type->resume)
- return serial->type->resume(serial);
- return 0;
+ rv = serial->type->resume(serial);
+ else
+ rv = usb_serial_generic_resume(serial);
+
+ return rv;
}
EXPORT_SYMBOL(usb_serial_resume);
@@ -1222,7 +1234,6 @@ static void fixup_generic(struct usb_serial_driver *device)
set_to_generic_if_null(device, read_bulk_callback);
set_to_generic_if_null(device, write_bulk_callback);
set_to_generic_if_null(device, shutdown);
- set_to_generic_if_null(device, resume);
}
int usb_serial_register(struct usb_serial_driver *driver)
@@ -1230,6 +1241,9 @@ int usb_serial_register(struct usb_serial_driver *driver)
/* must be called with BKL held */
int retval;
+ if (usb_disabled())
+ return -ENODEV;
+
fixup_generic(driver);
if (!driver->description)