usb: gadget: f_ecm: Add get_status callback

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 80841de845b09129564cb6d1b7710f8b76174292..027226325039f0c8eaee27a339513a758c01786b 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;