USB: cdc-acm - Add IGNORE_DEVICE quirk

Extracted from commit 16142655269a ("USB: cdc-acm - blacklist IMS PCU
device").

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index ca666d0..c0beb2f 100644 (file)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -916,6 +916,10 @@ static int acm_probe(struct usb_interface *intf,
 
        /* normal quirks */
        quirks = (unsigned long)id->driver_info;
+
+       if (quirks == IGNORE_DEVICE)
+               return -ENODEV;
+
        num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
 
        /* handle quirks deadly to normal probing*/

diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index 7aa5e9a..9af5ad2 100644 (file)
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -127,4 +127,5 @@ struct acm {
 #define NO_CAP_LINE                    4
 #define NOT_A_MODEM                    8
 #define NO_DATA_INTERFACE              16
+#define IGNORE_DEVICE                  32
 #define CLEAR_HALT_CONDITIONS          BIT(7)