USB: qcserial/option: make AT URCs work for Sierra Wireless MC73xx

As has been discussed in the thread starting with
https://lkml.kernel.org/g/549748e9.d+SiJzqu50f1r4lSAL043YSc@arcor.de
Sierra Wireless MC73xx devices with USB VID/PID 0x1199:0x68c0 require the
option_send_setup() code to be used on the USB interface for the AT port
to make unsolicited response codes work correctly. Move these devices from
the qcserial driver where they have been added by commit
70a3615fc07c2330ed7c1e922f3c44f4a67c0762 ("usb: qcserial: add Sierra Wireless
MC73xx") to the option driver and add a MC73xx-specific blacklist
to ensure that
1. the sendsetup code is not used for the DIAG/DM and NMEA interfaces
2. the option driver does not attach to the QMI/network interfaces

Signed-off-by: Reinhard Speyerer <rspmn@arcor.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>

2 files changed, 10 insertions, 2 deletions

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 7a4c21b4f676..efdcee15b520 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -234,6 +234,8 @@ static void option_instat_callback(struct urb *urb);
 
 #define QUALCOMM_VENDOR_ID                      0x05C6
 
+#define SIERRA_VENDOR_ID                        0x1199
+
 #define CMOTECH_VENDOR_ID                       0x16d8
 #define CMOTECH_PRODUCT_6001                    0x6001
 #define CMOTECH_PRODUCT_CMU_300                 0x6002
@@ -512,7 +514,7 @@ enum option_blacklist_reason {
                 OPTION_BLACKLIST_RESERVED_IF = 2
 };
 
-#define MAX_BL_NUM  8
+#define MAX_BL_NUM  11
 struct option_blacklist_info {
         /* bitfield of interface numbers for OPTION_BLACKLIST_SENDSETUP */
         const unsigned long sendsetup;
@@ -601,6 +603,11 @@ static const struct option_blacklist_info telit_le920_blacklist = {
         .reserved = BIT(1) | BIT(5),
 };
 
+static const struct option_blacklist_info sierra_mc73xx_blacklist = {
+        .sendsetup = BIT(0) | BIT(2),
+        .reserved = BIT(8) | BIT(10) | BIT(11),
+};
+
 static const struct usb_device_id option_ids[] = {
         { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
         { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
@@ -1098,6 +1105,8 @@ static const struct usb_device_id option_ids[] = {
         { USB_DEVICE(QUALCOMM_VENDOR_ID, 0x6613)}, /* Onda H600/ZTE MF330 */
         { USB_DEVICE(QUALCOMM_VENDOR_ID, 0x0023)}, /* ONYX 3G device */
         { USB_DEVICE(QUALCOMM_VENDOR_ID, 0x9000)}, /* SIMCom SIM5218 */
+        { USB_DEVICE_INTERFACE_CLASS(SIERRA_VENDOR_ID, 0x68c0, 0xff),
+          .driver_info = (kernel_ulong_t)&sierra_mc73xx_blacklist }, /* MC73xx */
         { USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6001) },
         { USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_CMU_300) },
         { USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6003),
diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
index cb3e14780a7e..9c63897b3a56 100644
--- a/drivers/usb/serial/qcserial.c
+++ b/drivers/usb/serial/qcserial.c
@@ -142,7 +142,6 @@ static const struct usb_device_id id_table[] = {
         {DEVICE_SWI(0x0f3d, 0x68a2)},   /* Sierra Wireless MC7700 */
         {DEVICE_SWI(0x114f, 0x68a2)},   /* Sierra Wireless MC7750 */
         {DEVICE_SWI(0x1199, 0x68a2)},   /* Sierra Wireless MC7710 */
-        {DEVICE_SWI(0x1199, 0x68c0)},   /* Sierra Wireless MC73xx */
         {DEVICE_SWI(0x1199, 0x901c)},   /* Sierra Wireless EM7700 */
         {DEVICE_SWI(0x1199, 0x901f)},   /* Sierra Wireless EM7355 */
         {DEVICE_SWI(0x1199, 0x9040)},   /* Sierra Wireless Modem */