[PATCH 1/2] usb: gadget: composite: Fix bMaxPower for SuperSpeedPlus

[PATCH 1/2] usb: gadget: composite: Fix bMaxPower for SuperSpeedPlus

[Jack Pham]

SuperSpeedPlus peripherals must report their bMaxPower of the
configuration descriptor in units of 8mA as per the USB 3.2
specification. The current switch statement in encode_bMaxPower()
only checks for USB_SPEED_SUPER but not USB_SPEED_SUPER_PLUS so
the latter falls back to USB 2.0 encoding which uses 2mA units.
Replace the switch with a simple if/else.

Fixes: eae5820b852f ("usb: gadget: composite: Write SuperSpeedPlus config descriptors")
Cc: stable@vger.kernel.org
Signed-off-by: Jack Pham <jackp@codeaurora.org>
---
 drivers/usb/gadget/composite.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index d516e8d6cd7f..e1db94d1fe2e 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -437,12 +437,10 @@ static u8 encode_bMaxPower(enum usb_device_speed speed,
 		val = CONFIG_USB_GADGET_VBUS_DRAW;
 	if (!val)
 		return 0;
-	switch (speed) {
-	case USB_SPEED_SUPER:
-		return DIV_ROUND_UP(val, 8);
-	default:
+	if (speed < USB_SPEED_SUPER)
 		return DIV_ROUND_UP(val, 2);
-	}
+	else
+		return DIV_ROUND_UP(val, 8);
 }
 
 static int config_buf(struct usb_configuration *config,
-- 
2.21.0