usb: gadget: use working speed to calcaulate network bitrate and qlen

Take ecm_bitrate() as example, it will be called after gadget device
link speed negotiation, consider code
if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER),
if a gadget device link speed is USB_SPEED_SUPER,
gadget_is_superspeed(g) must be true, or not it is a wrong
configuration of gadget max support speed.

Remove gadget_is_superspeed(g) checking should be safe, and remove other
similar operation in ncm, rndis, u_ether.
Signed-off-by: Linyu Yuan <quic_linyyuan@quicinc.com>
Link: https://lore.kernel.org/r/20230803091053.9714-2-quic_linyyuan@quicinc.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/function/f_ecm.c

@@ -68,9 +68,9 @@ static inline struct f_ecm *func_to_ecm(struct usb_function *f)
 /* peak (theoretical) bulk transfer rate in bits-per-second */
 static inline unsigned ecm_bitrate(struct usb_gadget *g)
 {
-	if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
+	if (g->speed == USB_SPEED_SUPER)
 		return 13 * 1024 * 8 * 1000 * 8;
-	else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
+	else if (g->speed == USB_SPEED_HIGH)
 		return 13 * 512 * 8 * 1000 * 8;
 	else
 		return 19 * 64 * 1 * 1000 * 8;

drivers/usb/gadget/function/f_ncm.c

@@ -85,11 +85,11 @@ static inline unsigned ncm_bitrate(struct usb_gadget *g)
 {
 	if (!g)
 		return 0;
-	else if (gadget_is_superspeed(g) && g->speed >= USB_SPEED_SUPER_PLUS)
+	else if (g->speed >= USB_SPEED_SUPER_PLUS)
 		return 4250000000U;
-	else if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
+	else if (g->speed == USB_SPEED_SUPER)
 		return 3750000000U;
-	else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
+	else if (g->speed == USB_SPEED_HIGH)
 		return 13 * 512 * 8 * 1000 * 8;
 	else
 		return 19 *  64 * 1 * 1000 * 8;

drivers/usb/gadget/function/f_rndis.c

@@ -87,11 +87,11 @@ static inline struct f_rndis *func_to_rndis(struct usb_function *f)
 /* peak (theoretical) bulk transfer rate in bits-per-second */
 static unsigned int bitrate(struct usb_gadget *g)
 {
-	if (gadget_is_superspeed(g) && g->speed >= USB_SPEED_SUPER_PLUS)
+	if (g->speed >= USB_SPEED_SUPER_PLUS)
 		return 4250000000U;
-	if (gadget_is_superspeed(g) && g->speed == USB_SPEED_SUPER)
+	if (g->speed == USB_SPEED_SUPER)
 		return 3750000000U;
-	else if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
+	else if (g->speed == USB_SPEED_HIGH)
 		return 13 * 512 * 8 * 1000 * 8;
 	else
 		return 19 * 64 * 1 * 1000 * 8;

drivers/usb/gadget/function/u_ether.c

@@ -93,11 +93,10 @@ struct eth_dev {
 
 #define DEFAULT_QLEN	2	/* double buffering by default */
 
-/* for dual-speed hardware, use deeper queues at high/super speed */
+/* use deeper queues at high/super speed */
 static inline int qlen(struct usb_gadget *gadget, unsigned qmult)
 {
-	if (gadget_is_dualspeed(gadget) && (gadget->speed == USB_SPEED_HIGH ||
-					    gadget->speed >= USB_SPEED_SUPER))
+	if (gadget->speed == USB_SPEED_HIGH || gadget->speed >= USB_SPEED_SUPER)
 		return qmult * DEFAULT_QLEN;
 	else
 		return DEFAULT_QLEN;