From 9ceafcc2b3ad48ad2ef42608f1505ecad515d144 Mon Sep 17 00:00:00 2001 From: Mian Yousaf Kaukab Date: Mon, 2 Feb 2015 10:55:25 +0100 Subject: [PATCH] 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: Mian Yousaf Kaukab Signed-off-by: Felipe Balbi --- drivers/usb/gadget/udc/net2280.c | 166 ++++++++++++++++++++++--------- 1 file changed, 119 insertions(+), 47 deletions(-) diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c index d51430f26ecf..5a8f6b6f7c8d 100644 --- a/drivers/usb/gadget/udc/net2280.c +++ b/drivers/usb/gadget/udc/net2280.c @@ -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 @@ done: 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); -- 2.39.5