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Commit 46dc0fc4 authored by Johan Hovold's avatar Johan Hovold
Browse files

USB: option: clean up blacklist handling 



Clean up the unnecessarily complicated blacklist implementation
somewhat.

Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
parent ec6f34e5

drivers/usb/serial/option.c

+14 −46
Original line number Diff line number Diff line
@@ -507,18 +507,10 @@ static void option_instat_callback(struct urb *urb); 
#define VIATELECOM_VENDOR_ID			0x15eb

#define VIATELECOM_PRODUCT_CDS7			0x0001



/* some devices interfaces need special handling due to a number of reasons */

enum option_blacklist_reason {

		OPTION_BLACKLIST_NONE = 0,

		OPTION_BLACKLIST_SENDSETUP = 1,

		OPTION_BLACKLIST_RESERVED_IF = 2

};



#define MAX_BL_NUM  11

struct option_blacklist_info {

	/* bitfield of interface numbers for OPTION_BLACKLIST_SENDSETUP */

	/* bitmask of interface numbers blacklisted for send_setup */

	const unsigned long sendsetup;

	/* bitfield of interface numbers for OPTION_BLACKLIST_RESERVED_IF */

	/* bitmask of interface numbers that are reserved */

	const unsigned long reserved;

};
@@ -1822,36 +1814,13 @@ struct option_private { 


module_usb_serial_driver(serial_drivers, option_ids);



static bool is_blacklisted(const u8 ifnum, enum option_blacklist_reason reason,

			   const struct option_blacklist_info *blacklist)

{

	unsigned long num;

	const unsigned long *intf_list;



	if (blacklist) {

		if (reason == OPTION_BLACKLIST_SENDSETUP)

			intf_list = &blacklist->sendsetup;

		else if (reason == OPTION_BLACKLIST_RESERVED_IF)

			intf_list = &blacklist->reserved;

		else {

			BUG_ON(reason);

			return false;

		}



		for_each_set_bit(num, intf_list, MAX_BL_NUM + 1) {

			if (num == ifnum)

				return true;

		}

	}

	return false;

}



static int option_probe(struct usb_serial *serial,

			const struct usb_device_id *id)

{

	struct usb_interface_descriptor *iface_desc =

				&serial->interface->cur_altsetting->desc;

	struct usb_device_descriptor *dev_desc = &serial->dev->descriptor;

	const struct option_blacklist_info *blacklist;



	/* Never bind to the CD-Rom emulation interface	*/

	if (iface_desc->bInterfaceClass == 0x08)
@@ -1862,10 +1831,9 @@ static int option_probe(struct usb_serial *serial, 
	 * the same class/subclass/protocol as the serial interfaces.  Look at

	 * the Windows driver .INF files for reserved interface numbers.

	 */

	if (is_blacklisted(

		iface_desc->bInterfaceNumber,

		OPTION_BLACKLIST_RESERVED_IF,

		(const struct option_blacklist_info *) id->driver_info))

	blacklist = (void *)id->driver_info;

	if (blacklist && test_bit(iface_desc->bInterfaceNumber,

						&blacklist->reserved))

		return -ENODEV;

	/*

	 * Don't bind network interface on Samsung GT-B3730, it is handled by
@@ -1876,8 +1844,8 @@ static int option_probe(struct usb_serial *serial, 
	    iface_desc->bInterfaceClass != USB_CLASS_CDC_DATA)

		return -ENODEV;



	/* Store device id so we can use it during attach. */

	usb_set_serial_data(serial, (void *)id);

	/* Store the blacklist info so we can use it during attach. */

	usb_set_serial_data(serial, (void *)blacklist);



	return 0;

}
@@ -1885,7 +1853,7 @@ static int option_probe(struct usb_serial *serial, 
static int option_attach(struct usb_serial *serial)

{

	struct usb_interface_descriptor *iface_desc;

	const struct usb_device_id *id;

	const struct option_blacklist_info *blacklist;

	struct usb_wwan_intf_private *data;

	struct option_private *priv;
@@ -1899,16 +1867,16 @@ static int option_attach(struct usb_serial *serial) 
		return -ENOMEM;

	}



	/* Retrieve device id stored at probe. */

	id = usb_get_serial_data(serial);

	/* Retrieve blacklist info stored at probe. */

	blacklist = usb_get_serial_data(serial);



	iface_desc = &serial->interface->cur_altsetting->desc;



	priv->bInterfaceNumber = iface_desc->bInterfaceNumber;

	data->private = priv;



	if (!is_blacklisted(iface_desc->bInterfaceNumber,

			OPTION_BLACKLIST_SENDSETUP,

			(struct option_blacklist_info *)id->driver_info)) {

	if (!blacklist || !test_bit(iface_desc->bInterfaceNumber,

						&blacklist->sendsetup)) {

		data->send_setup = option_send_setup;

	}

	spin_lock_init(&data->susp_lock);