3 files changed, 20 insertions, 18 deletions

diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index bffbc1dc651f..f855f1fc8e5e 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -46,6 +46,8 @@
 
 #define FUNCTIONFS_MAGIC	0xa647361 /* Chosen by a honest dice roll ;) */
 
+#define DMABUF_ENQUEUE_TIMEOUT_MS 5000
+
 MODULE_IMPORT_NS(DMA_BUF);
 
 /* Reference counter handling */
@@ -1578,10 +1580,13 @@ static int ffs_dmabuf_transfer(struct file *file,
 	struct ffs_dmabuf_priv *priv;
 	struct ffs_dma_fence *fence;
 	struct usb_request *usb_req;
+	enum dma_resv_usage resv_dir;
 	struct dma_buf *dmabuf;
+	unsigned long timeout;
 	struct ffs_ep *ep;
 	bool cookie;
 	u32 seqno;
+	long retl;
 	int ret;
 
 	if (req->flags & ~USB_FFS_DMABUF_TRANSFER_MASK)
@@ -1615,17 +1620,14 @@ static int ffs_dmabuf_transfer(struct file *file,
 		goto err_attachment_put;
 
 	/* Make sure we don't have writers */
-	if (!dma_resv_test_signaled(dmabuf->resv, DMA_RESV_USAGE_WRITE)) {
-		pr_vdebug("FFS WRITE fence is not signaled\n");
-		ret = -EBUSY;
-		goto err_resv_unlock;
-	}
-
-	/* If we're writing to the DMABUF, make sure we don't have readers */
-	if (epfile->in &&
-	    !dma_resv_test_signaled(dmabuf->resv, DMA_RESV_USAGE_READ)) {
-		pr_vdebug("FFS READ fence is not signaled\n");
-		ret = -EBUSY;
+	timeout = nonblock ? 0 : msecs_to_jiffies(DMABUF_ENQUEUE_TIMEOUT_MS);
+	retl = dma_resv_wait_timeout(dmabuf->resv,
+				     dma_resv_usage_rw(epfile->in),
+				     true, timeout);
+	if (retl == 0)
+		retl = -EBUSY;
+	if (retl < 0) {
+		ret = (int)retl;
 		goto err_resv_unlock;
 	}
 
@@ -1665,8 +1667,9 @@ static int ffs_dmabuf_transfer(struct file *file,
 	dma_fence_init(&fence->base, &ffs_dmabuf_fence_ops,
 		       &priv->lock, priv->context, seqno);
 
-	dma_resv_add_fence(dmabuf->resv, &fence->base,
-			   dma_resv_usage_rw(epfile->in));
+	resv_dir = epfile->in ? DMA_RESV_USAGE_WRITE : DMA_RESV_USAGE_READ;
+
+	dma_resv_add_fence(dmabuf->resv, &fence->base, resv_dir);
 	dma_resv_unlock(dmabuf->resv);
 
 	/* Now that the dma_fence is in place, queue the transfer. */
diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c
index 28f4e6552e84..0acc32ed9960 100644
--- a/drivers/usb/gadget/function/f_ncm.c
+++ b/drivers/usb/gadget/function/f_ncm.c
@@ -878,7 +878,7 @@ static int ncm_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 		if (alt > 1)
 			goto fail;
 
-		if (ncm->port.in_ep->enabled) {
+		if (ncm->netdev) {
 			DBG(cdev, "reset ncm\n");
 			ncm->netdev = NULL;
 			gether_disconnect(&ncm->port);
@@ -1367,7 +1367,7 @@ static void ncm_disable(struct usb_function *f)
 
 	DBG(cdev, "ncm deactivated\n");
 
-	if (ncm->port.in_ep->enabled) {
+	if (ncm->netdev) {
 		ncm->netdev = NULL;
 		gether_disconnect(&ncm->port);
 	}
diff --git a/drivers/usb/gadget/udc/fsl_udc_core.c b/drivers/usb/gadget/udc/fsl_udc_core.c
index e82d03224f94..3432ebfae978 100644
--- a/drivers/usb/gadget/udc/fsl_udc_core.c
+++ b/drivers/usb/gadget/udc/fsl_udc_core.c
@@ -868,7 +868,7 @@ fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 {
 	struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
 	struct fsl_req *req = container_of(_req, struct fsl_req, req);
-	struct fsl_udc *udc;
+	struct fsl_udc *udc = ep->udc;
 	unsigned long flags;
 	int ret;
 
@@ -878,7 +878,7 @@ fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 		dev_vdbg(&udc->gadget.dev, "%s, bad params\n", __func__);
 		return -EINVAL;
 	}
-	if (unlikely(!_ep || !ep->ep.desc)) {
+	if (unlikely(!ep->ep.desc)) {
 		dev_vdbg(&udc->gadget.dev, "%s, bad ep\n", __func__);
 		return -EINVAL;
 	}
@@ -887,7 +887,6 @@ fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
 			return -EMSGSIZE;
 	}
 
-	udc = ep->udc;
 	if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
 		return -ESHUTDOWN;