From: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
commit 09fe1f8d7e2f461275b1cdd832f2cfa5e9be346d upstream
This will help us remove the wait_event() from our ->dequeue().
Cc: Fei Yang <fei.yang@xxxxxxxxx>
Cc: Sam Protsenko <semen.protsenko@xxxxxxxxxx>
Cc: Felipe Balbi <balbi@xxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx # 4.19.y
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
(cherry picked from commit 09fe1f8d7e2f461275b1cdd832f2cfa5e9be346d)
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
drivers/usb/dwc3/core.h | 3 +++
drivers/usb/dwc3/gadget.c | 6 ++++++
2 files changed, 9 insertions(+)
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 4872cba8699b..0de78cb29f2c 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -847,6 +847,7 @@ struct dwc3_hwparams {
* @epnum: endpoint number to which this request refers
* @trb: pointer to struct dwc3_trb
* @trb_dma: DMA address of @trb
+ * @num_trbs: number of TRBs used by this request
* @needs_extra_trb: true when request needs one extra TRB (either due to ZLP
* or unaligned OUT)
* @direction: IN or OUT direction flag
@@ -867,6 +868,8 @@ struct dwc3_request {
struct dwc3_trb *trb;
dma_addr_t trb_dma;
+ unsigned num_trbs;
+
unsigned needs_extra_trb:1;
unsigned direction:1;
unsigned mapped:1;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 4894fed1441c..019643a6ce9d 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1043,6 +1043,8 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
req->trb_dma = dwc3_trb_dma_offset(dep, trb);
}
+ req->num_trbs++;
+
__dwc3_prepare_one_trb(dep, trb, dma, length, chain, node,
stream_id, short_not_ok, no_interrupt);
}
@@ -1077,6 +1079,7 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
/* Now prepare one extra TRB to align transfer size */
trb = &dep->trb_pool[dep->trb_enqueue];
+ req->num_trbs++;
__dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr,
maxp - rem, false, 1,
req->request.stream_id,
@@ -1121,6 +1124,7 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep,
/* Now prepare one extra TRB to align transfer size */
trb = &dep->trb_pool[dep->trb_enqueue];
+ req->num_trbs++;
__dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, maxp - rem,
false, 1, req->request.stream_id,
req->request.short_not_ok,
@@ -1137,6 +1141,7 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep,
/* Now prepare one extra TRB to handle ZLP */
trb = &dep->trb_pool[dep->trb_enqueue];
+ req->num_trbs++;
__dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, 0,
false, 1, req->request.stream_id,
req->request.short_not_ok,
@@ -2233,6 +2238,7 @@ static int dwc3_gadget_ep_reclaim_completed_trb(struct dwc3_ep *dep,
dwc3_ep_inc_deq(dep);
trace_dwc3_complete_trb(dep, trb);
+ req->num_trbs--;
/*
* If we're in the middle of series of chained TRBs and we
--
2.17.1
