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>

3 files changed, 19 insertions, 28 deletions

diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c
index 19fbd6965630..4d6e50b13d81 100644
--- a/drivers/usb/host/isp1760-hcd.c
+++ b/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)
diff --git a/drivers/usb/host/isp1760-hcd.h b/drivers/usb/host/isp1760-hcd.h
index ea13a58d44f8..372d2e5f1210 100644
--- a/drivers/usb/host/isp1760-hcd.h
+++ b/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
diff --git a/drivers/usb/host/isp1760-if.c b/drivers/usb/host/isp1760-if.c
index 64eaf5d0157e..03243b0dbe09 100644
--- a/drivers/usb/host/isp1760-if.c
+++ b/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;