From: Michal Nazarewicz Date: Wed, 1 Mar 2017 14:34:19 +0000 (+0100) Subject: usb: gadget: mv_udc: clarify a switch with an implicit fall-through X-Git-Tag: v4.12-rc1~97^2~25^2~49 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=edc69d556221b09ad7b91b4754a439e7bc1a01ce;p=karo-tx-linux.git usb: gadget: mv_udc: clarify a switch with an implicit fall-through Rearrange statements in mv_ep_enable function so that it’s obvious what the switch does and how zlt, ios and mult variables are initialised. Most notably, this gets rid of an implicit fall-through so people don’t have to wonder whether it was intenional or not. Addresses-Coverity-ID: 201385 Reported-by: Gustavo A. R. Silva Signed-off-by: Michal Nazarewicz Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/gadget/udc/mv_udc_core.c b/drivers/usb/gadget/udc/mv_udc_core.c index 27ebb0d5449d..76f56c5762f9 100644 --- a/drivers/usb/gadget/udc/mv_udc_core.c +++ b/drivers/usb/gadget/udc/mv_udc_core.c @@ -445,7 +445,8 @@ static int mv_ep_enable(struct usb_ep *_ep, struct mv_dqh *dqh; u16 max = 0; u32 bit_pos, epctrlx, direction; - unsigned char zlt = 0, ios = 0, mult = 0; + const unsigned char zlt = 1; + unsigned char ios, mult; unsigned long flags; ep = container_of(_ep, struct mv_ep, ep); @@ -465,8 +466,6 @@ static int mv_ep_enable(struct usb_ep *_ep, * disable HW zero length termination select * driver handles zero length packet through req->req.zero */ - zlt = 1; - bit_pos = 1 << ((direction == EP_DIR_OUT ? 0 : 16) + ep->ep_num); /* Check if the Endpoint is Primed */ @@ -481,16 +480,16 @@ static int mv_ep_enable(struct usb_ep *_ep, (unsigned)bit_pos); goto en_done; } + /* Set the max packet length, interrupt on Setup and Mult fields */ + ios = 0; + mult = 0; switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { case USB_ENDPOINT_XFER_BULK: - zlt = 1; - mult = 0; + case USB_ENDPOINT_XFER_INT: break; case USB_ENDPOINT_XFER_CONTROL: ios = 1; - case USB_ENDPOINT_XFER_INT: - mult = 0; break; case USB_ENDPOINT_XFER_ISOC: /* Calculate transactions needed for high bandwidth iso */