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path: root/drivers/usb/serial/option.c
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Diffstat (limited to 'drivers/usb/serial/option.c')
-rw-r--r--drivers/usb/serial/option.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index b4fe9ffd6dd..85e5fc08bba 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -346,6 +346,19 @@ static int option_resume(struct usb_serial *serial);
#define HAIER_VENDOR_ID 0x201e
#define HAIER_PRODUCT_CE100 0x2009
+/* 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
+};
+
+struct option_blacklist_info {
+ const u32 infolen; /* number of interface numbers on blacklist */
+ const u8 *ifaceinfo; /* pointer to the array holding the numbers */
+ enum option_blacklist_reason reason;
+};
+
static const struct usb_device_id option_ids[] = {
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
{ USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
@@ -711,6 +724,7 @@ struct option_intf_private {
spinlock_t susp_lock;
unsigned int suspended:1;
int in_flight;
+ struct option_blacklist_info *blacklist_info;
};
struct option_port_private {
@@ -780,9 +794,27 @@ static int option_probe(struct usb_serial *serial,
if (!data)
return -ENOMEM;
spin_lock_init(&data->susp_lock);
+ data->blacklist_info = (struct option_blacklist_info*) id->driver_info;
return 0;
}
+static enum option_blacklist_reason is_blacklisted(const u8 ifnum,
+ const struct option_blacklist_info *blacklist)
+{
+ const u8 *info;
+ int i;
+
+ if (blacklist) {
+ info = blacklist->ifaceinfo;
+
+ for (i = 0; i < blacklist->infolen; i++) {
+ if (info[i] == ifnum)
+ return blacklist->reason;
+ }
+ }
+ return OPTION_BLACKLIST_NONE;
+}
+
static void option_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old_termios)
{
@@ -1213,11 +1245,19 @@ static void option_setup_urbs(struct usb_serial *serial)
static int option_send_setup(struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
+ struct option_intf_private *intfdata =
+ (struct option_intf_private *) serial->private;
struct option_port_private *portdata;
int ifNum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
int val = 0;
dbg("%s", __func__);
+ if (is_blacklisted(ifNum, intfdata->blacklist_info) ==
+ OPTION_BLACKLIST_SENDSETUP) {
+ dbg("No send_setup on blacklisted interface #%d\n", ifNum);
+ return -EIO;
+ }
+
portdata = usb_get_serial_port_data(port);
if (portdata->dtr_state)