usb: gadget: f_ecm: Add get_status callback

commit 8e3820271c517ceb89ab7442656ba49fa23ee1d0 upstream.

When host sends GET_STATUS to ECM interface, handle the request
from the function driver. Since the interface is wakeup capable,
set the corresponding bit, and set RW bit if the function is
already armed for wakeup by the host.

Cc: stable <stable@kernel.org>
Fixes: 481c225c4802 ("usb: gadget: Handle function suspend feature selector")
Signed-off-by: Prashanth K <prashanth.k@oss.qualcomm.com>
Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20250422103231.1954387-2-prashanth.k@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/function/f_ecm.c b/drivers/usb/gadget/function/f_ecm.c
index f55f60639e4251d6ee9ccd28faaeeac8104f353b..2afc30de54ce2da0239efbb502e893ea88aaa559 100644 (file)
--- a/drivers/usb/gadget/function/f_ecm.c
+++ b/drivers/usb/gadget/function/f_ecm.c
@@ -892,6 +892,12 @@ static void ecm_resume(struct usb_function *f)
        gether_resume(&ecm->port);
 }
 
+static int ecm_get_status(struct usb_function *f)
+{
+       return (f->func_wakeup_armed ? USB_INTRF_STAT_FUNC_RW : 0) |
+               USB_INTRF_STAT_FUNC_RW_CAP;
+}
+
 static void ecm_free(struct usb_function *f)
 {
        struct f_ecm *ecm;
@@ -960,6 +966,7 @@ static struct usb_function *ecm_alloc(struct usb_function_instance *fi)
        ecm->port.func.disable = ecm_disable;
        ecm->port.func.free_func = ecm_free;
        ecm->port.func.suspend = ecm_suspend;
+       ecm->port.func.get_status = ecm_get_status;
        ecm->port.func.resume = ecm_resume;
 
        return &ecm->port.func;