[PATCH v5 1/3] usb: gadget: Refactor request completion

From: Michal Sojka
Date: Wed Sep 17 2014 - 03:22:50 EST

All USB peripheral controller drivers called completion routines
directly. This patch moves the completion call from drivers to
usb_gadget_giveback_request(), in order to have a place where common
functionality can be added.

All places in drivers/usb/ matching "[-.]complete(" were replaced with a
call to usb_gadget_giveback_request(). This was compile-tested with all
ARM drivers enabled and runtime-tested for musb.

Signed-off-by: Michal Sojka <sojka@xxxxxxxxx>
---
drivers/usb/chipidea/udc.c | 6 +++---
drivers/usb/dwc2/gadget.c | 6 +++---
drivers/usb/dwc3/gadget.c | 2 +-
drivers/usb/gadget/udc/amd5536udc.c | 2 +-
drivers/usb/gadget/udc/at91_udc.c | 2 +-
drivers/usb/gadget/udc/atmel_usba_udc.c | 4 ++--
drivers/usb/gadget/udc/bcm63xx_udc.c | 2 +-
drivers/usb/gadget/udc/dummy_hcd.c | 10 +++++-----
drivers/usb/gadget/udc/fotg210-udc.c | 2 +-
drivers/usb/gadget/udc/fsl_qe_udc.c | 6 +-----
drivers/usb/gadget/udc/fsl_udc_core.c | 6 ++----
drivers/usb/gadget/udc/fusb300_udc.c | 2 +-
drivers/usb/gadget/udc/goku_udc.c | 2 +-
drivers/usb/gadget/udc/gr_udc.c | 2 +-
drivers/usb/gadget/udc/lpc32xx_udc.c | 2 +-
drivers/usb/gadget/udc/m66592-udc.c | 2 +-
drivers/usb/gadget/udc/mv_u3d_core.c | 8 ++------
drivers/usb/gadget/udc/mv_udc_core.c | 8 ++------
drivers/usb/gadget/udc/net2272.c | 2 +-
drivers/usb/gadget/udc/net2280.c | 2 +-
drivers/usb/gadget/udc/omap_udc.c | 2 +-
drivers/usb/gadget/udc/pch_udc.c | 2 +-
drivers/usb/gadget/udc/pxa25x_udc.c | 2 +-
drivers/usb/gadget/udc/pxa27x_udc.c | 2 +-
drivers/usb/gadget/udc/r8a66597-udc.c | 2 +-
drivers/usb/gadget/udc/s3c-hsudc.c | 3 +--
drivers/usb/gadget/udc/s3c2410_udc.c | 2 +-
drivers/usb/gadget/udc/udc-core.c | 19 +++++++++++++++++++
drivers/usb/musb/musb_gadget.c | 2 +-
drivers/usb/renesas_usbhs/mod_gadget.c | 2 +-
include/linux/usb/gadget.h | 8 ++++++++
31 files changed, 68 insertions(+), 56 deletions(-)

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index b8125aa..0444d3f 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -627,7 +627,7 @@ __acquires(hwep->lock)

if (hwreq->req.complete != NULL) {
spin_unlock(hwep->lock);
- hwreq->req.complete(&hwep->ep, &hwreq->req);
+ usb_gadget_giveback_request(&hwep->ep, &hwreq->req);
spin_lock(hwep->lock);
}
}
@@ -922,7 +922,7 @@ __acquires(hwep->lock)
if ((hwep->type == USB_ENDPOINT_XFER_CONTROL) &&
hwreq->req.length)
hweptemp = hwep->ci->ep0in;
- hwreq->req.complete(&hweptemp->ep, &hwreq->req);
+ usb_gadget_giveback_request(&hweptemp->ep, &hwreq->req);
spin_lock(hwep->lock);
}
}
@@ -1347,7 +1347,7 @@ static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)

if (hwreq->req.complete != NULL) {
spin_unlock(hwep->lock);
- hwreq->req.complete(&hwep->ep, &hwreq->req);
+ usb_gadget_giveback_request(&hwep->ep, &hwreq->req);
spin_lock(hwep->lock);
}

diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 0ba9c33..5a524a6 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -987,8 +987,8 @@ static int s3c_hsotg_process_req_feature(struct s3c_hsotg *hsotg,
hs_req = ep->req;
ep->req = NULL;
list_del_init(&hs_req->queue);
- hs_req->req.complete(&ep->ep,
- &hs_req->req);
+ usb_gadget_giveback_request(&ep->ep,
+ &hs_req->req);
}

/* If we have pending request, then start it */
@@ -1245,7 +1245,7 @@ static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg,

if (hs_req->req.complete) {
spin_unlock(&hsotg->lock);
- hs_req->req.complete(&hs_ep->ep, &hs_req->req);
+ usb_gadget_giveback_request(&hs_ep->ep, &hs_req->req);
spin_lock(&hsotg->lock);
}

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 349cacc..b4b7a6b 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -268,7 +268,7 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
req->request.length, status);

spin_unlock(&dwc->lock);
- req->request.complete(&dep->endpoint, &req->request);
+ usb_gadget_giveback_request(&dep->endpoint, &req->request);
spin_lock(&dwc->lock);
}

diff --git a/drivers/usb/gadget/udc/amd5536udc.c b/drivers/usb/gadget/udc/amd5536udc.c
index 41b062e..3b9d138 100644
--- a/drivers/usb/gadget/udc/amd5536udc.c
+++ b/drivers/usb/gadget/udc/amd5536udc.c
@@ -841,7 +841,7 @@ __acquires(ep->dev->lock)
&req->req, req->req.length, ep->ep.name, sts);

spin_unlock(&dev->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&dev->lock);
ep->halted = halted;
}
diff --git a/drivers/usb/gadget/udc/at91_udc.c b/drivers/usb/gadget/udc/at91_udc.c
index cfd18bc..9968f53 100644
--- a/drivers/usb/gadget/udc/at91_udc.c
+++ b/drivers/usb/gadget/udc/at91_udc.c
@@ -267,7 +267,7 @@ static void done(struct at91_ep *ep, struct at91_request *req, int status)

ep->stopped = 1;
spin_unlock(&udc->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&udc->lock);
ep->stopped = stopped;

diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 906e65f..e96032f 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -463,7 +463,7 @@ static void receive_data(struct usba_ep *ep)
list_del_init(&req->queue);
usba_ep_writel(ep, CTL_DIS, USBA_RX_BK_RDY);
spin_unlock(&udc->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&udc->lock);
}

@@ -495,7 +495,7 @@ request_complete(struct usba_ep *ep, struct usba_request *req, int status)
ep->ep.name, req, req->req.status, req->req.actual);

spin_unlock(&udc->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&udc->lock);
}

diff --git a/drivers/usb/gadget/udc/bcm63xx_udc.c b/drivers/usb/gadget/udc/bcm63xx_udc.c
index e969eb8..2235b88 100644
--- a/drivers/usb/gadget/udc/bcm63xx_udc.c
+++ b/drivers/usb/gadget/udc/bcm63xx_udc.c
@@ -1088,7 +1088,7 @@ static int bcm63xx_ep_disable(struct usb_ep *ep)
breq->req.status = -ESHUTDOWN;

spin_unlock_irqrestore(&udc->lock, flags);
- breq->req.complete(&iudma->bep->ep, &breq->req);
+ usb_gadget_giveback_request(&iudma->bep->ep, &breq->req);
spin_lock_irqsave(&udc->lock, flags);
}
}
diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index 2b54955..81dc595 100644
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -258,7 +258,7 @@ static void nuke(struct dummy *dum, struct dummy_ep *ep)
req->req.status = -ESHUTDOWN;

spin_unlock(&dum->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&dum->lock);
}
}
@@ -658,7 +658,7 @@ static int dummy_queue(struct usb_ep *_ep, struct usb_request *_req,
spin_unlock(&dum->lock);
_req->actual = _req->length;
_req->status = 0;
- _req->complete(_ep, _req);
+ usb_gadget_giveback_request(_ep, _req);
spin_lock(&dum->lock);
} else
list_add_tail(&req->queue, &ep->queue);
@@ -702,7 +702,7 @@ static int dummy_dequeue(struct usb_ep *_ep, struct usb_request *_req)
dev_dbg(udc_dev(dum),
"dequeued req %p from %s, len %d buf %p\n",
req, _ep->name, _req->length, _req->buf);
- _req->complete(_ep, _req);
+ usb_gadget_giveback_request(_ep, _req);
}
local_irq_restore(flags);
return retval;
@@ -1385,7 +1385,7 @@ top:
list_del_init(&req->queue);

spin_unlock(&dum->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&dum->lock);

/* requests might have been unlinked... */
@@ -1761,7 +1761,7 @@ restart:
req);

spin_unlock(&dum->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&dum->lock);
ep->already_seen = 0;
goto restart;
diff --git a/drivers/usb/gadget/udc/fotg210-udc.c b/drivers/usb/gadget/udc/fotg210-udc.c
index e143d69..1d31592 100644
--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -70,7 +70,7 @@ static void fotg210_done(struct fotg210_ep *ep, struct fotg210_request *req,
req->req.status = status;

spin_unlock(&ep->fotg210->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&ep->fotg210->lock);

if (ep->epnum) {
diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c b/drivers/usb/gadget/udc/fsl_qe_udc.c
index 7324308..dd18ea3 100644
--- a/drivers/usb/gadget/udc/fsl_qe_udc.c
+++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
@@ -118,10 +118,7 @@ static void done(struct qe_ep *ep, struct qe_req *req, int status)
ep->stopped = 1;
spin_unlock(&udc->lock);

- /* this complete() should a func implemented by gadget layer,
- * eg fsg->bulk_in_complete() */
- if (req->req.complete)
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);

spin_lock(&udc->lock);

@@ -2728,4 +2725,3 @@ module_platform_driver(udc_driver);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_LICENSE("GPL");
-
diff --git a/drivers/usb/gadget/udc/fsl_udc_core.c b/drivers/usb/gadget/udc/fsl_udc_core.c
index 75b23ea..c362079 100644
--- a/drivers/usb/gadget/udc/fsl_udc_core.c
+++ b/drivers/usb/gadget/udc/fsl_udc_core.c
@@ -197,10 +197,8 @@ __acquires(ep->udc->lock)
ep->stopped = 1;

spin_unlock(&ep->udc->lock);
- /* complete() is from gadget layer,
- * eg fsg->bulk_in_complete() */
- if (req->req.complete)
- req->req.complete(&ep->ep, &req->req);
+
+ usb_gadget_giveback_request(&ep->ep, &req->req);

spin_lock(&ep->udc->lock);
ep->stopped = stopped;
diff --git a/drivers/usb/gadget/udc/fusb300_udc.c b/drivers/usb/gadget/udc/fusb300_udc.c
index d40255f..d52687d 100644
--- a/drivers/usb/gadget/udc/fusb300_udc.c
+++ b/drivers/usb/gadget/udc/fusb300_udc.c
@@ -876,7 +876,7 @@ static void done(struct fusb300_ep *ep, struct fusb300_request *req,
req->req.status = status;

spin_unlock(&ep->fusb300->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&ep->fusb300->lock);

if (ep->epnum) {
diff --git a/drivers/usb/gadget/udc/goku_udc.c b/drivers/usb/gadget/udc/goku_udc.c
index 6c85839..bf9c5ef 100644
--- a/drivers/usb/gadget/udc/goku_udc.c
+++ b/drivers/usb/gadget/udc/goku_udc.c
@@ -320,7 +320,7 @@ done(struct goku_ep *ep, struct goku_request *req, int status)
/* don't modify queue heads during completion callback */
ep->stopped = 1;
spin_unlock(&dev->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&dev->lock);
ep->stopped = stopped;
}
diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c
index 08df5c4..924533b 100644
--- a/drivers/usb/gadget/udc/gr_udc.c
+++ b/drivers/usb/gadget/udc/gr_udc.c
@@ -339,7 +339,7 @@ static void gr_finish_request(struct gr_ep *ep, struct gr_request *req,
} else if (req->req.complete) {
spin_unlock(&dev->lock);

- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);

spin_lock(&dev->lock);
}
diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c
index 1629ad7..feab0ba 100644
--- a/drivers/usb/gadget/udc/lpc32xx_udc.c
+++ b/drivers/usb/gadget/udc/lpc32xx_udc.c
@@ -1479,7 +1479,7 @@ static void done(struct lpc32xx_ep *ep, struct lpc32xx_request *req, int status)

ep->req_pending = 0;
spin_unlock(&udc->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&udc->lock);
}

diff --git a/drivers/usb/gadget/udc/m66592-udc.c b/drivers/usb/gadget/udc/m66592-udc.c
index de88d33..8985656 100644
--- a/drivers/usb/gadget/udc/m66592-udc.c
+++ b/drivers/usb/gadget/udc/m66592-udc.c
@@ -729,7 +729,7 @@ __acquires(m66592->lock)
restart = 1;

spin_unlock(&ep->m66592->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&ep->m66592->lock);

if (restart) {
diff --git a/drivers/usb/gadget/udc/mv_u3d_core.c b/drivers/usb/gadget/udc/mv_u3d_core.c
index 1624871..046a1f8 100644
--- a/drivers/usb/gadget/udc/mv_u3d_core.c
+++ b/drivers/usb/gadget/udc/mv_u3d_core.c
@@ -222,12 +222,8 @@ void mv_u3d_done(struct mv_u3d_ep *ep, struct mv_u3d_req *req, int status)
}

spin_unlock(&ep->u3d->lock);
- /*
- * complete() is from gadget layer,
- * eg fsg->bulk_in_complete()
- */
- if (req->req.complete)
- req->req.complete(&ep->ep, &req->req);
+
+ usb_gadget_giveback_request(&ep->ep, &req->req);

spin_lock(&ep->u3d->lock);
}
diff --git a/drivers/usb/gadget/udc/mv_udc_core.c b/drivers/usb/gadget/udc/mv_udc_core.c
index 040fb16..3c5db80 100644
--- a/drivers/usb/gadget/udc/mv_udc_core.c
+++ b/drivers/usb/gadget/udc/mv_udc_core.c
@@ -248,12 +248,8 @@ static void done(struct mv_ep *ep, struct mv_req *req, int status)
ep->stopped = 1;

spin_unlock(&ep->udc->lock);
- /*
- * complete() is from gadget layer,
- * eg fsg->bulk_in_complete()
- */
- if (req->req.complete)
- req->req.complete(&ep->ep, &req->req);
+
+ usb_gadget_giveback_request(&ep->ep, &req->req);

spin_lock(&ep->udc->lock);
ep->stopped = stopped;
diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index 059cfe5..84d7162 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -394,7 +394,7 @@ net2272_done(struct net2272_ep *ep, struct net2272_request *req, int status)
/* don't modify queue heads during completion callback */
ep->stopped = 1;
spin_unlock(&dev->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&dev->lock);
ep->stopped = stopped;
}
diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c
index f4eac11..2cda166 100644
--- a/drivers/usb/gadget/udc/net2280.c
+++ b/drivers/usb/gadget/udc/net2280.c
@@ -928,7 +928,7 @@ done(struct net2280_ep *ep, struct net2280_request *req, int status)
/* don't modify queue heads during completion callback */
ep->stopped = 1;
spin_unlock(&dev->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&dev->lock);
ep->stopped = stopped;
}
diff --git a/drivers/usb/gadget/udc/omap_udc.c b/drivers/usb/gadget/udc/omap_udc.c
index e731373..dcdfea4 100644
--- a/drivers/usb/gadget/udc/omap_udc.c
+++ b/drivers/usb/gadget/udc/omap_udc.c
@@ -315,7 +315,7 @@ done(struct omap_ep *ep, struct omap_req *req, int status)
/* don't modify queue heads during completion callback */
ep->stopped = 1;
spin_unlock(&ep->udc->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&ep->udc->lock);
ep->stopped = stopped;
}
diff --git a/drivers/usb/gadget/udc/pch_udc.c b/drivers/usb/gadget/udc/pch_udc.c
index eb8c3be..0b69b32 100644
--- a/drivers/usb/gadget/udc/pch_udc.c
+++ b/drivers/usb/gadget/udc/pch_udc.c
@@ -1486,7 +1486,7 @@ static void complete_req(struct pch_udc_ep *ep, struct pch_udc_request *req,
spin_unlock(&dev->lock);
if (!ep->in)
pch_udc_ep_clear_rrdy(ep);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&dev->lock);
ep->halted = halted;
}
diff --git a/drivers/usb/gadget/udc/pxa25x_udc.c b/drivers/usb/gadget/udc/pxa25x_udc.c
index 251e4d5..42f7eeb 100644
--- a/drivers/usb/gadget/udc/pxa25x_udc.c
+++ b/drivers/usb/gadget/udc/pxa25x_udc.c
@@ -347,7 +347,7 @@ static void done(struct pxa25x_ep *ep, struct pxa25x_request *req, int status)

/* don't modify queue heads during completion callback */
ep->stopped = 1;
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
ep->stopped = stopped;
}

diff --git a/drivers/usb/gadget/udc/pxa27x_udc.c b/drivers/usb/gadget/udc/pxa27x_udc.c
index 597d39f..4868369 100644
--- a/drivers/usb/gadget/udc/pxa27x_udc.c
+++ b/drivers/usb/gadget/udc/pxa27x_udc.c
@@ -758,7 +758,7 @@ static void req_done(struct pxa_ep *ep, struct pxa27x_request *req, int status,
if (pflags)
spin_unlock_irqrestore(&ep->lock, *pflags);
local_irq_save(flags);
- req->req.complete(&req->udc_usb_ep->usb_ep, &req->req);
+ usb_gadget_giveback_request(&req->udc_usb_ep->usb_ep, &req->req);
local_irq_restore(flags);
if (pflags)
spin_lock_irqsave(&ep->lock, *pflags);
diff --git a/drivers/usb/gadget/udc/r8a66597-udc.c b/drivers/usb/gadget/udc/r8a66597-udc.c
index 4600842..0ec09a4 100644
--- a/drivers/usb/gadget/udc/r8a66597-udc.c
+++ b/drivers/usb/gadget/udc/r8a66597-udc.c
@@ -925,7 +925,7 @@ __acquires(r8a66597->lock)
sudmac_free_channel(ep->r8a66597, ep, req);

spin_unlock(&ep->r8a66597->lock);
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
spin_lock(&ep->r8a66597->lock);

if (restart) {
diff --git a/drivers/usb/gadget/udc/s3c-hsudc.c b/drivers/usb/gadget/udc/s3c-hsudc.c
index 10c6a12..dfbf557 100644
--- a/drivers/usb/gadget/udc/s3c-hsudc.c
+++ b/drivers/usb/gadget/udc/s3c-hsudc.c
@@ -258,8 +258,7 @@ static void s3c_hsudc_complete_request(struct s3c_hsudc_ep *hsep,

hsep->stopped = 1;
spin_unlock(&hsudc->lock);
- if (hsreq->req.complete != NULL)
- hsreq->req.complete(&hsep->ep, &hsreq->req);
+ usb_gadget_giveback_request(&hsep->ep, &hsreq->req);
spin_lock(&hsudc->lock);
hsep->stopped = stopped;
}
diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c
index 357b58e..ff423d1 100644
--- a/drivers/usb/gadget/udc/s3c2410_udc.c
+++ b/drivers/usb/gadget/udc/s3c2410_udc.c
@@ -272,7 +272,7 @@ static void s3c2410_udc_done(struct s3c2410_ep *ep,
status = req->req.status;

ep->halted = 1;
- req->req.complete(&ep->ep, &req->req);
+ usb_gadget_giveback_request(&ep->ep, &req->req);
ep->halted = halted;
}

diff --git a/drivers/usb/gadget/udc/udc-core.c b/drivers/usb/gadget/udc/udc-core.c
index b0d9817..29789f1 100644
--- a/drivers/usb/gadget/udc/udc-core.c
+++ b/drivers/usb/gadget/udc/udc-core.c
@@ -106,6 +106,25 @@ EXPORT_SYMBOL_GPL(usb_gadget_unmap_request);

/* ------------------------------------------------------------------------- */

+/**
+ * usb_gadget_giveback_request - give the request back to the gadget layer
+ * Context: in_interrupt()
+ *
+ * This is called by device controller drivers in order to return the
+ * completed request back to the gadget layer.
+ */
+void usb_gadget_giveback_request(struct usb_ep *ep,
+ struct usb_request *req)
+{
+ if (likely(req->complete))
+ req->complete(ep, req);
+ else
+ pr_err("%s : req->complete must not be NULL\n", __func__);
+}
+EXPORT_SYMBOL_GPL(usb_gadget_giveback_request);
+
+/* ------------------------------------------------------------------------- */
+
static void usb_gadget_state_work(struct work_struct *work)
{
struct usb_gadget *gadget = work_to_gadget(work);
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index d4aa779..24c8c02 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -176,7 +176,7 @@ __acquires(ep->musb->lock)
ep->end_point.name, request,
req->request.actual, req->request.length,
request->status);
- req->request.complete(&req->ep->end_point, &req->request);
+ usb_gadget_giveback_request(&req->ep->end_point, &req->request);
spin_lock(&musb->lock);
ep->busy = busy;
}
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index 04e6505..2d17c10 100644
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -129,7 +129,7 @@ static void usbhsg_queue_pop(struct usbhsg_uep *uep,
dev_dbg(dev, "pipe %d : queue pop\n", usbhs_pipe_number(pipe));

ureq->req.status = status;
- ureq->req.complete(&uep->ep, &ureq->req);
+ usb_gadget_giveback_request(&uep->ep, &ureq->req);
}

static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index c3a6185..f795e95 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -1013,6 +1013,14 @@ extern void usb_gadget_set_state(struct usb_gadget *gadget,

/*-------------------------------------------------------------------------*/

+/* utility to give requests back to the gadget layer */
+
+extern void usb_gadget_giveback_request(struct usb_ep *ep,
+ struct usb_request *req);
+
+
+/*-------------------------------------------------------------------------*/
+
/* utility wrapping a simple endpoint selection policy */

extern struct usb_ep *usb_ep_autoconfig(struct usb_gadget *,
--
2.1.0

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