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USB: serial: metro-usb: simplify endpoint check

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Let usb-serial core verify that the interrupt-in endpoint is present
when binding the interface instead of the driver verifying this at every
open.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2017-10-12 10:54:22 +02:00
parent 2339536d22
commit 6f792f471f
1 changed files with 1 additions and 7 deletions
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8
drivers/usb/serial/metro-usb.c
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@ -160,13 +160,6 @@ static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port)
unsigned long flags = 0;
int result = 0;
/* Make sure the urb is initialized. */
if (!port->interrupt_in_urb) {
dev_err(&port->dev, "%s - interrupt urb not initialized\n",
__func__);
return -ENODEV;
}
/* Set the private data information for the port. */
spin_lock_irqsave(&metro_priv->lock, flags);
metro_priv->control_state = 0;
@ -342,6 +335,7 @@ static struct usb_serial_driver metrousb_device = {
.description = "Metrologic USB to Serial",
.id_table = id_table,
.num_ports = 1,
.num_interrupt_in = 1,
.open = metrousb_open,
.close = metrousb_cleanup,
.read_int_callback = metrousb_read_int_callback,