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Commit 9ceafcc2 authored by Mian Yousaf Kaukab's avatar Mian Yousaf Kaukab Committed by Felipe Balbi
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usb: gadget: net2280: print error in ep_ops error paths 



Hopefully, these prints will help localize the problems faster.

[ balbi@ti.com: removed 2 unnecessary OOM error messages ]

Signed-off-by: default avatarMian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent fb2a85dd

drivers/usb/gadget/udc/net2280.c

+119 −47
Original line number Diff line number Diff line
@@ -145,31 +145,44 @@ net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) 
	u32			max, tmp;

	unsigned long		flags;

	static const u32 ep_key[9] = { 1, 0, 1, 0, 1, 1, 0, 1, 0 };

	int ret = 0;



	ep = container_of(_ep, struct net2280_ep, ep);

	if (!_ep || !desc || ep->desc || _ep->name == ep0name ||

			desc->bDescriptorType != USB_DT_ENDPOINT)

			desc->bDescriptorType != USB_DT_ENDPOINT) {

		pr_err("%s: failed at line=%d\n", __func__, __LINE__);

		return -EINVAL;

	}

	dev = ep->dev;

	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)

		return -ESHUTDOWN;

	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {

		ret = -ESHUTDOWN;

		goto print_err;

	}



	/* erratum 0119 workaround ties up an endpoint number */

	if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE)

		return -EDOM;

	if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) {

		ret = -EDOM;

		goto print_err;

	}



	if (dev->quirks & PLX_SUPERSPEED) {

		if ((desc->bEndpointAddress & 0x0f) >= 0x0c)

			return -EDOM;

		if ((desc->bEndpointAddress & 0x0f) >= 0x0c) {

			ret = -EDOM;

			goto print_err;

		}

		ep->is_in = !!usb_endpoint_dir_in(desc);

		if (dev->enhanced_mode && ep->is_in && ep_key[ep->num])

			return -EINVAL;

		if (dev->enhanced_mode && ep->is_in && ep_key[ep->num]) {

			ret = -EINVAL;

			goto print_err;

		}

	}



	/* sanity check ep-e/ep-f since their fifos are small */

	max = usb_endpoint_maxp(desc) & 0x1fff;

	if (ep->num > 4 && max > 64 && (dev->quirks & PLX_LEGACY))

		return -ERANGE;

	if (ep->num > 4 && max > 64 && (dev->quirks & PLX_LEGACY)) {

		ret = -ERANGE;

		goto print_err;

	}



	spin_lock_irqsave(&dev->lock, flags);

	_ep->maxpacket = max & 0x7ff;
@@ -199,7 +212,8 @@ net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) 
		    (dev->gadget.speed == USB_SPEED_HIGH && max != 512) ||

		    (dev->gadget.speed == USB_SPEED_FULL && max > 64)) {

			spin_unlock_irqrestore(&dev->lock, flags);

			return -ERANGE;

			ret = -ERANGE;

			goto print_err;

		}

	}

	ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC);
@@ -278,7 +292,11 @@ net2280_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) 


	/* pci writes may still be posted */

	spin_unlock_irqrestore(&dev->lock, flags);

	return 0;

	return ret;



print_err:

	dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret);

	return ret;

}



static int handshake(u32 __iomem *ptr, u32 mask, u32 done, int usec)
@@ -433,9 +451,10 @@ static int net2280_disable(struct usb_ep *_ep) 
	unsigned long		flags;



	ep = container_of(_ep, struct net2280_ep, ep);

	if (!_ep || !ep->desc || _ep->name == ep0name)

	if (!_ep || !ep->desc || _ep->name == ep0name) {

		pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);

		return -EINVAL;



	}

	spin_lock_irqsave(&ep->dev->lock, flags);

	nuke(ep);
@@ -465,8 +484,10 @@ static struct usb_request 
	struct net2280_ep	*ep;

	struct net2280_request	*req;



	if (!_ep)

	if (!_ep) {

		pr_err("%s: Invalid ep\n", __func__);

		return NULL;

	}

	ep = container_of(_ep, struct net2280_ep, ep);



	req = kzalloc(sizeof(*req), gfp_flags);
@@ -498,8 +519,11 @@ static void net2280_free_request(struct usb_ep *_ep, struct usb_request *_req) 
	struct net2280_request	*req;



	ep = container_of(_ep, struct net2280_ep, ep);

	if (!_ep || !_req)

	if (!_ep || !_req) {

		dev_err(&ep->dev->pdev->dev, "%s: Inavlid ep=%p or req=%p\n",

							__func__, _ep, _req);

		return;

	}



	req = container_of(_req, struct net2280_request, req);

	WARN_ON(!list_empty(&req->queue));
@@ -903,35 +927,44 @@ net2280_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) 
	struct net2280_ep	*ep;

	struct net2280		*dev;

	unsigned long		flags;

	int ret = 0;



	/* we always require a cpu-view buffer, so that we can

	 * always use pio (as fallback or whatever).

	 */

	req = container_of(_req, struct net2280_request, req);

	if (!_req || !_req->complete || !_req->buf ||

				!list_empty(&req->queue))

		return -EINVAL;

	if (_req->length > (~0 & DMA_BYTE_COUNT_MASK))

		return -EDOM;

	ep = container_of(_ep, struct net2280_ep, ep);

	if (!_ep || (!ep->desc && ep->num != 0))

	if (!_ep || (!ep->desc && ep->num != 0)) {

		pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);

		return -EINVAL;

	}

	req = container_of(_req, struct net2280_request, req);

	if (!_req || !_req->complete || !_req->buf ||

				!list_empty(&req->queue)) {

		ret = -EINVAL;

		goto print_err;

	}

	if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) {

		ret = -EDOM;

		goto print_err;

	}

	dev = ep->dev;

	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)

		return -ESHUTDOWN;

	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {

		ret = -ESHUTDOWN;

		goto print_err;

	}



	/* FIXME implement PIO fallback for ZLPs with DMA */

	if (ep->dma && _req->length == 0)

		return -EOPNOTSUPP;

	if (ep->dma && _req->length == 0) {

		ret = -EOPNOTSUPP;

		goto print_err;

	}



	/* set up dma mapping in case the caller didn't */

	if (ep->dma) {

		int ret;



		ret = usb_gadget_map_request(&dev->gadget, _req,

				ep->is_in);

		if (ret)

			return ret;

			goto print_err;

	}



	ep_vdbg(dev, "%s queue req %p, len %d buf %p\n",
@@ -1020,7 +1053,11 @@ net2280_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) 
	spin_unlock_irqrestore(&dev->lock, flags);



	/* pci writes may still be posted */

	return 0;

	return ret;



print_err:

	dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, ret);

	return ret;

}



static inline void
@@ -1141,8 +1178,11 @@ static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req) 
	int			stopped;



	ep = container_of(_ep, struct net2280_ep, ep);

	if (!_ep || (!ep->desc && ep->num != 0) || !_req)

	if (!_ep || (!ep->desc && ep->num != 0) || !_req) {

		pr_err("%s: Invalid ep=%p or ep->desc or req=%p\n",

						__func__, _ep, _req);

		return -EINVAL;

	}



	spin_lock_irqsave(&ep->dev->lock, flags);

	stopped = ep->stopped;
@@ -1164,6 +1204,8 @@ static int net2280_dequeue(struct usb_ep *_ep, struct usb_request *_req) 
	}

	if (&req->req != _req) {

		spin_unlock_irqrestore(&ep->dev->lock, flags);

		dev_err(&ep->dev->pdev->dev, "%s: Request mismatch\n",

								__func__);

		return -EINVAL;

	}
@@ -1221,20 +1263,28 @@ net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) 
	int			retval = 0;



	ep = container_of(_ep, struct net2280_ep, ep);

	if (!_ep || (!ep->desc && ep->num != 0))

	if (!_ep || (!ep->desc && ep->num != 0)) {

		pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);

		return -EINVAL;

	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)

		return -ESHUTDOWN;

	}

	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {

		retval = -ESHUTDOWN;

		goto print_err;

	}

	if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03)

						== USB_ENDPOINT_XFER_ISOC)

		return -EINVAL;

						== USB_ENDPOINT_XFER_ISOC) {

		retval = -EINVAL;

		goto print_err;

	}



	spin_lock_irqsave(&ep->dev->lock, flags);

	if (!list_empty(&ep->queue))

	if (!list_empty(&ep->queue)) {

		retval = -EAGAIN;

	else if (ep->is_in && value && net2280_fifo_status(_ep) != 0)

		goto print_unlock;

	} else if (ep->is_in && value && net2280_fifo_status(_ep) != 0) {

		retval = -EAGAIN;

	else {

		goto print_unlock;

	} else {

		ep_vdbg(ep->dev, "%s %s %s\n", _ep->name,

				value ? "set" : "clear",

				wedged ? "wedge" : "halt");
@@ -1258,6 +1308,12 @@ net2280_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) 
	spin_unlock_irqrestore(&ep->dev->lock, flags);



	return retval;



print_unlock:

	spin_unlock_irqrestore(&ep->dev->lock, flags);

print_err:

	dev_err(&ep->dev->pdev->dev, "%s: error=%d\n", __func__, retval);

	return retval;

}



static int net2280_set_halt(struct usb_ep *_ep, int value)
@@ -1267,8 +1323,10 @@ static int net2280_set_halt(struct usb_ep *_ep, int value) 


static int net2280_set_wedge(struct usb_ep *_ep)

{

	if (!_ep || _ep->name == ep0name)

	if (!_ep || _ep->name == ep0name) {

		pr_err("%s: Invalid ep=%p or ep0\n", __func__, _ep);

		return -EINVAL;

	}

	return net2280_set_halt_and_wedge(_ep, 1, 1);

}
@@ -1278,14 +1336,22 @@ static int net2280_fifo_status(struct usb_ep *_ep) 
	u32			avail;



	ep = container_of(_ep, struct net2280_ep, ep);

	if (!_ep || (!ep->desc && ep->num != 0))

	if (!_ep || (!ep->desc && ep->num != 0)) {

		pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);

		return -ENODEV;

	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)

	}

	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {

		dev_err(&ep->dev->pdev->dev,

			"%s: Invalid driver=%p or speed=%d\n",

			__func__, ep->dev->driver, ep->dev->gadget.speed);

		return -ESHUTDOWN;

	}



	avail = readl(&ep->regs->ep_avail) & (BIT(12) - 1);

	if (avail > ep->fifo_size)

	if (avail > ep->fifo_size) {

		dev_err(&ep->dev->pdev->dev, "%s: Fifo overflow\n", __func__);

		return -EOVERFLOW;

	}

	if (ep->is_in)

		avail = ep->fifo_size - avail;

	return avail;
@@ -1296,10 +1362,16 @@ static void net2280_fifo_flush(struct usb_ep *_ep) 
	struct net2280_ep	*ep;



	ep = container_of(_ep, struct net2280_ep, ep);

	if (!_ep || (!ep->desc && ep->num != 0))

	if (!_ep || (!ep->desc && ep->num != 0)) {

		pr_err("%s: Invalid ep=%p or ep->desc\n", __func__, _ep);

		return;

	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)

	}

	if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) {

		dev_err(&ep->dev->pdev->dev,

			"%s: Invalid driver=%p or speed=%d\n",

			__func__, ep->dev->driver, ep->dev->gadget.speed);

		return;

	}



	writel(BIT(FIFO_FLUSH), &ep->regs->ep_stat);

	(void) readl(&ep->regs->ep_rsp);