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USB: serial: allow subdrivers to modify port-endpoint mapping

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Allow subdrivers to modify the port-endpoint mapping by passing the
endpoint descriptors to calc_num_ports.

The callback can now also be used to verify that the required endpoints
exists and abort probing otherwise.

This will allow us to get rid of a few hacks in subdrivers that are
already modifying the port-endpoint mapping (or aborting probe due to
missing endpoints), but only after the port structures have been setup.

Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold
2017-03-16 17:13:30 +01:00
parent 2ac8fc51dd
commit 07814246dd
10 changed files with 42 additions and 26 deletions
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6
drivers/usb/serial/ipaq.c
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@@ -33,7 +33,8 @@ static int initial_wait;
/* Function prototypes for an ipaq */
static int ipaq_open(struct tty_struct *tty,
struct usb_serial_port *port);
static int ipaq_calc_num_ports(struct usb_serial *serial);
static int ipaq_calc_num_ports(struct usb_serial *serial,
struct usb_serial_endpoints *epds);
static int ipaq_startup(struct usb_serial *serial);
static const struct usb_device_id ipaq_id_table[] = {
@@ -550,7 +551,8 @@ static int ipaq_open(struct tty_struct *tty,
return usb_serial_generic_open(tty, port);
}
static int ipaq_calc_num_ports(struct usb_serial *serial)
static int ipaq_calc_num_ports(struct usb_serial *serial,
struct usb_serial_endpoints *epds)
{
/*
* some devices have 3 endpoints, the 3rd of which