From: Praveena Nadahally <praveen.nadahally@xxxxxxxxxxxxxx>
The protocol code is set 00 in IAD and it's set to 01 in ACM control
interface descriptor in f_acm.c file. Due to this, windows is unable to
install the modem(ACM) driver based on class-subclass-protocol matching.
This patch corrects the protocol code in ACM IAD to the same as in
acm_control_interface_desc protocol code.
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxxxxxx>
Signed-off-by: Praveena Nadahally <praveen.nadahally@xxxxxxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/gadget/f_acm.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/gadget/f_acm.c b/drivers/usb/gadget/f_acm.c
index d47a123..bd6226c 100644
--- a/drivers/usb/gadget/f_acm.c
+++ b/drivers/usb/gadget/f_acm.c
@@ -111,7 +111,7 @@ acm_iad_descriptor = {
.bInterfaceCount = 2, // control + data
.bFunctionClass = USB_CLASS_COMM,
.bFunctionSubClass = USB_CDC_SUBCLASS_ACM,
- .bFunctionProtocol = USB_CDC_PROTO_NONE,
+ .bFunctionProtocol = USB_CDC_ACM_PROTO_AT_V25TER,
/* .iFunction = DYNAMIC */
};
--
1.7.2
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