4.18-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold johan@kernel.org
commit 35aecc02b5b621782111f64cbb032c7f6a90bb32 upstream.
Allow matching on interfaces having two endpoints by adding a new device-id flag.
This allows for the handling of devices whose interface numbers can change (e.g. Quectel EP06) to be contained in the device-id table.
Tested-by: Kristian Evensen kristian.evensen@gmail.com Cc: stable stable@vger.kernel.org Signed-off-by: Johan Hovold johan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/serial/option.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-)
--- a/drivers/usb/serial/option.c +++ b/drivers/usb/serial/option.c @@ -561,6 +561,9 @@ static void option_instat_callback(struc /* Interface is reserved */ #define RSVD(ifnum) ((BIT(ifnum) & 0xff) << 0)
+/* Interface must have two endpoints */ +#define NUMEP2 BIT(16) +
static const struct usb_device_id option_ids[] = { { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) }, @@ -1082,7 +1085,7 @@ static const struct usb_device_id option { USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_BG96), .driver_info = RSVD(4) }, { USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EP06, 0xff, 0xff, 0xff), - .driver_info = RSVD(1) | RSVD(2) | RSVD(3) | RSVD(4) }, + .driver_info = RSVD(1) | RSVD(2) | RSVD(3) | RSVD(4) | NUMEP2 }, { USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EP06, 0xff, 0, 0) }, { USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6001) }, { USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_CMU_300) }, @@ -1986,7 +1989,6 @@ static int option_probe(struct usb_seria { struct usb_interface_descriptor *iface_desc = &serial->interface->cur_altsetting->desc; - struct usb_device_descriptor *dev_desc = &serial->dev->descriptor; unsigned long device_flags = id->driver_info;
/* Never bind to the CD-Rom emulation interface */ @@ -2002,16 +2004,11 @@ static int option_probe(struct usb_seria return -ENODEV;
/* - * Don't bind to the QMI device of the Quectel EP06/EG06/EM06. Class, - * subclass and protocol is 0xff for both the diagnostic port and the - * QMI interface, but the diagnostic port only has two endpoints (QMI - * has three). + * Allow matching on bNumEndpoints for devices whose interface numbers + * can change (e.g. Quectel EP06). */ - if (dev_desc->idVendor == cpu_to_le16(QUECTEL_VENDOR_ID) && - dev_desc->idProduct == cpu_to_le16(QUECTEL_PRODUCT_EP06) && - iface_desc->bInterfaceSubClass && iface_desc->bNumEndpoints == 3) { + if (device_flags & NUMEP2 && iface_desc->bNumEndpoints != 2) return -ENODEV; - }
/* Store the device flags so we can use them during attach. */ usb_set_serial_data(serial, (void *)device_flags);