usb: isp1760: Don't expose hcd to glue code from isp1760_register

The glue code probe functions don't need to access the hcd structure
anymore. Modify isp1760_register to return an integer error code instead
of the hcd pointer.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/host/isp1760-hcd.c

@@ -60,6 +60,9 @@ struct isp1760_hcd {
 	struct gpio_desc	*rst_gpio;
 };
 
+typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh,
+		struct isp1760_qtd *qtd);
+
 static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
 {
 	return (struct isp1760_hcd *) (hcd->hcd_priv);
@@ -2208,24 +2211,23 @@ void deinit_kmem_cache(void)
 	kmem_cache_destroy(urb_listitem_cachep);
 }
 
-struct usb_hcd *isp1760_register(phys_addr_t res_start, resource_size_t res_len,
-				 int irq, unsigned long irqflags,
-				 struct device *dev, const char *busname,
-				 unsigned int devflags)
+int isp1760_register(phys_addr_t res_start, resource_size_t res_len, int irq,
+		     unsigned long irqflags, struct device *dev,
+		     const char *busname, unsigned int devflags)
 {
 	struct usb_hcd *hcd;
 	struct isp1760_hcd *priv;
 	int ret;
 
 	if (usb_disabled())
-		return ERR_PTR(-ENODEV);
+		return -ENODEV;
 
 	/* prevent usb-core allocating DMA pages */
 	dev->dma_mask = NULL;
 
 	hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev));
 	if (!hcd)
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 
 	priv = hcd_to_priv(hcd);
 	priv->devflags = devflags;
@@ -2254,7 +2256,7 @@ struct usb_hcd *isp1760_register(phys_addr_t res_start, resource_size_t res_len,
 
 	dev_set_drvdata(dev, hcd);
 
-	return hcd;
+	return 0;
 
 err_unmap:
 	 iounmap(hcd->regs);
@@ -2262,7 +2264,7 @@ err_unmap:
 err_put:
 	 usb_put_hcd(hcd);
 
-	 return ERR_PTR(ret);
+	 return ret;
 }
 
 void isp1760_unregister(struct device *dev)

drivers/usb/host/isp1760-hcd.h

@@ -2,10 +2,9 @@
 #define _ISP1760_HCD_H_
 
 /* exports for if */
-struct usb_hcd *isp1760_register(phys_addr_t res_start, resource_size_t res_len,
-				 int irq, unsigned long irqflags,
-				 struct device *dev, const char *busname,
-				 unsigned int devflags);
+int isp1760_register(phys_addr_t res_start, resource_size_t res_len, int irq,
+		     unsigned long irqflags, struct device *dev,
+		     const char *busname, unsigned int devflags);
 void isp1760_unregister(struct device *dev);
 
 int init_kmem_once(void);
@@ -112,9 +111,6 @@ struct slotinfo {
 };
 
 
-typedef void (packet_enqueue)(struct usb_hcd *hcd, struct isp1760_qh *qh,
-		struct isp1760_qtd *qtd);
-
 /*
  * Device flags that can vary from board to board.  All of these
  * indicate the most "atypical" case, so that a devflags of 0 is

drivers/usb/host/isp1760-if.c

@@ -31,7 +31,6 @@ static int isp1761_pci_probe(struct pci_dev *dev,
 	u8 latency, limit;
 	__u32 reg_data;
 	int retry_count;
-	struct usb_hcd *hcd;
 	unsigned int devflags = 0;
 	int ret_status = 0;
 
@@ -134,13 +133,11 @@ static int isp1761_pci_probe(struct pci_dev *dev,
 	writel(reg_data, iobase + PLX_INT_CSR_REG);
 
 	dev->dev.dma_mask = NULL;
-	hcd = isp1760_register(pci_mem_phy0, memlength, dev->irq,
-			       IRQF_SHARED, &dev->dev, dev_name(&dev->dev),
-			       devflags);
-	if (IS_ERR(hcd)) {
-		ret_status = -ENODEV;
+	ret_status = isp1760_register(pci_mem_phy0, memlength, dev->irq,
+				      IRQF_SHARED, &dev->dev,
+				      dev_name(&dev->dev), devflags);
+	if (ret_status < 0)
 		goto cleanup3;
-	}
 
 	/* done with PLX IO access */
 	iounmap(iobase);
@@ -198,7 +195,6 @@ static int isp1760_plat_probe(struct platform_device *pdev)
 	struct resource *mem_res;
 	struct resource *irq_res;
 	resource_size_t mem_size;
-	struct usb_hcd *hcd;
 	int ret;
 
 	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -262,14 +258,11 @@ static int isp1760_plat_probe(struct platform_device *pdev)
 			devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
 	}
 
-	hcd = isp1760_register(mem_res->start, mem_size, irq_res->start,
+	ret = isp1760_register(mem_res->start, mem_size, irq_res->start,
 			       irqflags, &pdev->dev, dev_name(&pdev->dev),
 			       devflags);
-	if (IS_ERR(hcd)) {
-		pr_warning("isp1760: Failed to register the HCD device\n");
-		ret = PTR_ERR(hcd);
+	if (ret < 0)
 		goto cleanup;
-	}
 
 	pr_info("ISP1760 USB device initialised\n");
 	return 0;