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hso: always read interface number from the current altsetting

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Always read bInterfaceNumber from the current altsetting, not from the first one
available in the altsetting array. This is coming from code review, not related
to any specific bug.

Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Aleksander Morgado 2015-02-17 11:31:29 +01:00 committed by David S. Miller
parent 216fa18f33
commit 64bea46e3f
1 changed files with 9 additions and 4 deletions
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13
drivers/net/usb/hso.c
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@ -1477,6 +1477,7 @@ static void tiocmget_intr_callback(struct urb *urb)
struct uart_icount *icount;
struct hso_serial_state_notification *serial_state_notification;
struct usb_device *usb;
struct usb_interface *interface;
int if_num;
/* Sanity checks */
@ -1494,7 +1495,9 @@ static void tiocmget_intr_callback(struct urb *urb)
BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
usb = serial->parent->usb;
if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
interface = serial->parent->interface;
if_num = interface->cur_altsetting->desc.bInterfaceNumber;
/* wIndex should be the USB interface number of the port to which the
* notification applies, which should always be the Modem port.
@ -1675,6 +1678,7 @@ static int hso_serial_tiocmset(struct tty_struct *tty,
unsigned long flags;
int if_num;
struct hso_serial *serial = tty->driver_data;
struct usb_interface *interface;
/* sanity check */
if (!serial) {
@ -1685,7 +1689,8 @@ static int hso_serial_tiocmset(struct tty_struct *tty,
if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
return -EINVAL;
if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
interface = serial->parent->interface;
if_num = interface->cur_altsetting->desc.bInterfaceNumber;
spin_lock_irqsave(&serial->serial_lock, flags);
if (set & TIOCM_RTS)
@ -2808,7 +2813,7 @@ static int hso_get_config_data(struct usb_interface *interface)
{
struct usb_device *usbdev = interface_to_usbdev(interface);
u8 *config_data = kmalloc(17, GFP_KERNEL);
u32 if_num = interface->altsetting->desc.bInterfaceNumber;
u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber;
s32 result;
if (!config_data)
@ -2886,7 +2891,7 @@ static int hso_probe(struct usb_interface *interface,
return -ENODEV;
}
if_num = interface->altsetting->desc.bInterfaceNumber;
if_num = interface->cur_altsetting->desc.bInterfaceNumber;
/* Get the interface/port specification from either driver_info or from
* the device itself */