instead of having one big loop, let's split it down into two smaller
handlers: one for linear buffers and one for scatterlist.
Signed-off-by: Felipe Balbi <felipe.ba...@linux.intel.com>
---
drivers/usb/dwc3/gadget.c | 71 ++++++++++++++++++++++++++++++-----------------
1 file changed, 45 insertions(+), 26 deletions(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index fea515e4efec..040c4fea2700 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2246,6 +2246,45 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct
dwc3_ep *dep,
return 0;
}
+static int dwc3_gadget_ep_reclaim_trb_sg(struct dwc3_ep *dep,
+ struct dwc3_request *req, const struct dwc3_event_depevt *event,
+ int status)
+{
+ struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue];
+ struct scatterlist *sg = req->sg;
+ struct scatterlist *s;
+ unsigned int pending = req->num_pending_sgs;
+ unsigned int i;
+ int ret = 0;
+
+ for_each_sg(sg, s, pending, i) {
+ trb = &dep->trb_pool[dep->trb_dequeue];
+
+ if (trb->ctrl & DWC3_TRB_CTRL_HWO)
+ break;
+
+ req->sg = sg_next(s);
+ req->num_pending_sgs--;
+
+ ret = dwc3_gadget_ep_reclaim_completed_trb(dep, req,
+ trb, event, status, true);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+static int dwc3_gadget_ep_reclaim_trb_linear(struct dwc3_ep *dep,
+ struct dwc3_request *req, const struct dwc3_event_depevt *event,
+ int status)
+{
+ struct dwc3_trb *trb = &dep->trb_pool[dep->trb_dequeue];
+
+ return dwc3_gadget_ep_reclaim_completed_trb(dep, req, trb,
+ event, status, false);
+}
+
static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep,
const struct dwc3_event_depevt *event, int status)
{
@@ -2259,32 +2298,12 @@ static void
dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep,
length = req->request.length;
chain = req->num_pending_sgs > 0;
- if (chain) {
- struct scatterlist *sg = req->sg;
- struct scatterlist *s;
- unsigned int pending = req->num_pending_sgs;
- unsigned int i;
-
- for_each_sg(sg, s, pending, i) {
- trb = &dep->trb_pool[dep->trb_dequeue];
-
- if (trb->ctrl & DWC3_TRB_CTRL_HWO)
- break;
-
- req->sg = sg_next(s);
- req->num_pending_sgs--;
-
- ret = dwc3_gadget_ep_reclaim_completed_trb(dep,
- req, trb, event, status,
- chain);
- if (ret)
- break;
- }
- } else {
- trb = &dep->trb_pool[dep->trb_dequeue];
- ret = dwc3_gadget_ep_reclaim_completed_trb(dep, req,
- trb, event, status, chain);
- }
+ if (chain)
+ ret = dwc3_gadget_ep_reclaim_trb_sg(dep, req, event,
+ status);
+ else
+ ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event,
+ status);
if (req->unaligned || req->zero) {
trb = &dep->trb_pool[dep->trb_dequeue];
--
2.16.1
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