USB: option: clean up blacklist handling
Clean up the unnecessarily complicated blacklist implementation
somewhat.
Signed-off-by: Johan Hovold <johan@kernel.org>
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index efdcee1..f0c0c53 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -507,18 +507,10 @@
#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 @@
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 @@
* 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 @@
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_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 @@
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);