[PATCH] drivers/usb/input: convert to dynamic input_dev allocation

Input: convert drivers/iusb/input to dynamic input_dev allocation

This is required for input_dev sysfs integration

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 89 insertions, 84 deletions

diff --git a/drivers/usb/input/ati_remote.c b/drivers/usb/input/ati_remote.c
index fd99681ee483..9a2a47db9494 100644
--- a/drivers/usb/input/ati_remote.c
+++ b/drivers/usb/input/ati_remote.c
@@ -112,7 +112,6 @@
 
 #define NAME_BUFSIZE      80    /* size of product name, path buffers */
 #define DATA_BUFSIZE      63    /* size of URB data buffers */
-#define ATI_INPUTNUM      1     /* Which input device to register as */
 
 static unsigned long channel_mask;
 module_param(channel_mask, ulong, 0444);
@@ -162,7 +161,7 @@ static char accel[] = { 1, 2, 4, 6, 9, 13, 20 };
 static DECLARE_MUTEX(disconnect_sem);
 
 struct ati_remote {
-        struct input_dev idev;
+        struct input_dev *idev;
         struct usb_device *udev;
         struct usb_interface *interface;
 
@@ -198,15 +197,13 @@ struct ati_remote {
 #define KIND_ACCEL      7   /* Directional keypad - left, right, up, down.*/
 
 /* Translation table from hardware messages to input events. */
-static struct
-{
+static struct {
         short kind;
         unsigned char data1, data2;
         int type;
         unsigned int code;
         int value;
-}  ati_remote_tbl[] =
-{
+}  ati_remote_tbl[] = {
         /* Directional control pad axes */
         {KIND_ACCEL,   0x35, 0x70, EV_REL, REL_X, -1},   /* left */
         {KIND_ACCEL,   0x36, 0x71, EV_REL, REL_X, 1},    /* right */
@@ -286,7 +283,6 @@ static struct
 
 /* Local function prototypes */
 static void ati_remote_dump             (unsigned char *data, unsigned int actual_length);
-static void ati_remote_delete           (struct ati_remote *dev);
 static int ati_remote_open              (struct input_dev *inputdev);
 static void ati_remote_close            (struct input_dev *inputdev);
 static int ati_remote_sendpacket        (struct ati_remote *ati_remote, u16 cmd, unsigned char *data);
@@ -428,7 +424,7 @@ static void ati_remote_input_report(struct urb *urb, struct pt_regs *regs)
 {
         struct ati_remote *ati_remote = urb->context;
         unsigned char *data= ati_remote->inbuf;
-        struct input_dev *dev = &ati_remote->idev;
+        struct input_dev *dev = ati_remote->idev;
         int index, acc;
         int remote_num;
 
@@ -587,38 +583,55 @@ static void ati_remote_irq_in(struct urb *urb, struct pt_regs *regs)
 }
 
 /*
- *      ati_remote_delete
+ *      ati_remote_alloc_buffers
  */
-static void ati_remote_delete(struct ati_remote *ati_remote)
+static int ati_remote_alloc_buffers(struct usb_device *udev,
+                                    struct ati_remote *ati_remote)
 {
-        if (ati_remote->irq_urb)
-                usb_kill_urb(ati_remote->irq_urb);
+        ati_remote->inbuf = usb_buffer_alloc(udev, DATA_BUFSIZE, SLAB_ATOMIC,
+                                             &ati_remote->inbuf_dma);
+        if (!ati_remote->inbuf)
+                return -1;
 
-        if (ati_remote->out_urb)
-                usb_kill_urb(ati_remote->out_urb);
+        ati_remote->outbuf = usb_buffer_alloc(udev, DATA_BUFSIZE, SLAB_ATOMIC,
+                                              &ati_remote->outbuf_dma);
+        if (!ati_remote->outbuf)
+                return -1;
 
-        input_unregister_device(&ati_remote->idev);
+        ati_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
+        if (!ati_remote->irq_urb)
+                return -1;
 
-        if (ati_remote->inbuf)
-                usb_buffer_free(ati_remote->udev, DATA_BUFSIZE,
-                                ati_remote->inbuf, ati_remote->inbuf_dma);
+        ati_remote->out_urb = usb_alloc_urb(0, GFP_KERNEL);
+        if (!ati_remote->out_urb)
+                return -1;
 
-        if (ati_remote->outbuf)
-                usb_buffer_free(ati_remote->udev, DATA_BUFSIZE,
-                                ati_remote->outbuf, ati_remote->outbuf_dma);
+        return 0;
+}
 
+/*
+ *      ati_remote_free_buffers
+ */
+static void ati_remote_free_buffers(struct ati_remote *ati_remote)
+{
         if (ati_remote->irq_urb)
                 usb_free_urb(ati_remote->irq_urb);
 
         if (ati_remote->out_urb)
                 usb_free_urb(ati_remote->out_urb);
 
-        kfree(ati_remote);
+        if (ati_remote->inbuf)
+                usb_buffer_free(ati_remote->udev, DATA_BUFSIZE,
+                                ati_remote->inbuf, ati_remote->inbuf_dma);
+
+        if (ati_remote->outbuf)
+                usb_buffer_free(ati_remote->udev, DATA_BUFSIZE,
+                                ati_remote->inbuf, ati_remote->outbuf_dma);
 }
 
 static void ati_remote_input_init(struct ati_remote *ati_remote)
 {
-        struct input_dev *idev = &(ati_remote->idev);
+        struct input_dev *idev = ati_remote->idev;
         int i;
 
         idev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
@@ -637,7 +650,7 @@ static void ati_remote_input_init(struct ati_remote *ati_remote)
         idev->phys = ati_remote->phys;
 
         usb_to_input_id(ati_remote->udev, &idev->id);
-        idev->dev = &ati_remote->udev->dev;
+        idev->cdev.dev = &ati_remote->udev->dev;
 }
 
 static int ati_remote_initialize(struct ati_remote *ati_remote)
@@ -674,7 +687,7 @@ static int ati_remote_initialize(struct ati_remote *ati_remote)
             (ati_remote_sendpacket(ati_remote, 0x8007, init2))) {
                 dev_err(&ati_remote->interface->dev,
                          "Initializing ati_remote hardware failed.\n");
-                return 1;
+                return -EIO;
         }
 
         return 0;
@@ -686,95 +699,83 @@ static int ati_remote_initialize(struct ati_remote *ati_remote)
 static int ati_remote_probe(struct usb_interface *interface, const struct usb_device_id *id)
 {
         struct usb_device *udev = interface_to_usbdev(interface);
-        struct ati_remote *ati_remote = NULL;
-        struct usb_host_interface *iface_host;
-        int retval = -ENOMEM;
-        char path[64];
-
-        /* Allocate and clear an ati_remote struct */
-        if (!(ati_remote = kmalloc(sizeof (struct ati_remote), GFP_KERNEL)))
-                return -ENOMEM;
-        memset(ati_remote, 0x00, sizeof (struct ati_remote));
+        struct usb_host_interface *iface_host = interface->cur_altsetting;
+        struct usb_endpoint_descriptor *endpoint_in, *endpoint_out;
+        struct ati_remote *ati_remote;
+        struct input_dev *input_dev;
+        int err = -ENOMEM;
 
-        iface_host = interface->cur_altsetting;
         if (iface_host->desc.bNumEndpoints != 2) {
                 err("%s: Unexpected desc.bNumEndpoints\n", __FUNCTION__);
-                retval = -ENODEV;
-                goto error;
+                return -ENODEV;
         }
 
-        ati_remote->endpoint_in = &(iface_host->endpoint[0].desc);
-        ati_remote->endpoint_out = &(iface_host->endpoint[1].desc);
-        ati_remote->udev = udev;
-        ati_remote->interface = interface;
+        endpoint_in = &iface_host->endpoint[0].desc;
+        endpoint_out = &iface_host->endpoint[1].desc;
 
-        if (!(ati_remote->endpoint_in->bEndpointAddress & 0x80)) {
+        if (!(endpoint_in->bEndpointAddress & USB_DIR_IN)) {
                 err("%s: Unexpected endpoint_in->bEndpointAddress\n", __FUNCTION__);
-                retval = -ENODEV;
-                goto error;
+                return -ENODEV;
         }
-        if ((ati_remote->endpoint_in->bmAttributes & 3) != 3) {
+        if ((endpoint_in->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT) {
                 err("%s: Unexpected endpoint_in->bmAttributes\n", __FUNCTION__);
-                retval = -ENODEV;
-                goto error;
+                return -ENODEV;
         }
-        if (le16_to_cpu(ati_remote->endpoint_in->wMaxPacketSize) == 0) {
+        if (le16_to_cpu(endpoint_in->wMaxPacketSize) == 0) {
                 err("%s: endpoint_in message size==0? \n", __FUNCTION__);
-                retval = -ENODEV;
-                goto error;
+                return -ENODEV;
         }
 
-        /* Allocate URB buffers, URBs */
-        ati_remote->inbuf = usb_buffer_alloc(udev, DATA_BUFSIZE, SLAB_ATOMIC,
-                                             &ati_remote->inbuf_dma);
-        if (!ati_remote->inbuf)
-                goto error;
+        ati_remote = kzalloc(sizeof (struct ati_remote), GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!ati_remote || !input_dev)
+                goto fail1;
 
-        ati_remote->outbuf = usb_buffer_alloc(udev, DATA_BUFSIZE, SLAB_ATOMIC,
-                                              &ati_remote->outbuf_dma);
-        if (!ati_remote->outbuf)
-                goto error;
+        /* Allocate URB buffers, URBs */
+        if (ati_remote_alloc_buffers(udev, ati_remote))
+                goto fail2;
 
-        ati_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
-        if (!ati_remote->irq_urb)
-                goto error;
+        ati_remote->endpoint_in = endpoint_in;
+        ati_remote->endpoint_out = endpoint_out;
+        ati_remote->udev = udev;
+        ati_remote->idev = input_dev;
+        ati_remote->interface = interface;
 
-        ati_remote->out_urb = usb_alloc_urb(0, GFP_KERNEL);
-        if (!ati_remote->out_urb)
-                goto error;
+        usb_make_path(udev, ati_remote->phys, sizeof(ati_remote->phys));
+        strlcpy(ati_remote->phys, "/input0", sizeof(ati_remote->phys));
 
-        usb_make_path(udev, path, NAME_BUFSIZE);
-        sprintf(ati_remote->phys, "%s/input%d", path, ATI_INPUTNUM);
         if (udev->manufacturer)
-                strcat(ati_remote->name, udev->manufacturer);
+                strlcpy(ati_remote->name, udev->manufacturer, sizeof(ati_remote->name));
 
         if (udev->product)
-                sprintf(ati_remote->name, "%s %s", ati_remote->name, udev->product);
+                snprintf(ati_remote->name, sizeof(ati_remote->name),
+                         "%s %s", ati_remote->name, udev->product);
 
         if (!strlen(ati_remote->name))
-                sprintf(ati_remote->name, DRIVER_DESC "(%04x,%04x)",
+                snprintf(ati_remote->name, sizeof(ati_remote->name),
+                        DRIVER_DESC "(%04x,%04x)",
                         le16_to_cpu(ati_remote->udev->descriptor.idVendor),
                         le16_to_cpu(ati_remote->udev->descriptor.idProduct));
 
+        ati_remote_input_init(ati_remote);
+
         /* Device Hardware Initialization - fills in ati_remote->idev from udev. */
-        retval = ati_remote_initialize(ati_remote);
-        if (retval)
-                goto error;
+        err = ati_remote_initialize(ati_remote);
+        if (err)
+                goto fail3;
 
         /* Set up and register input device */
-        ati_remote_input_init(ati_remote);
-        input_register_device(&ati_remote->idev);
-
-        dev_info(&ati_remote->interface->dev, "Input registered: %s on %s\n",
-                 ati_remote->name, path);
+        input_register_device(ati_remote->idev);
 
         usb_set_intfdata(interface, ati_remote);
+        return 0;
 
-error:
-        if (retval)
-                ati_remote_delete(ati_remote);
-
-        return retval;
+fail3:  usb_kill_urb(ati_remote->irq_urb);
+        usb_kill_urb(ati_remote->out_urb);
+fail2:  ati_remote_free_buffers(ati_remote);
+fail1:  input_free_device(input_dev);
+        kfree(ati_remote);
+        return err;
 }
 
 /*
@@ -791,7 +792,11 @@ static void ati_remote_disconnect(struct usb_interface *interface)
                 return;
         }
 
-        ati_remote_delete(ati_remote);
+        usb_kill_urb(ati_remote->irq_urb);
+        usb_kill_urb(ati_remote->out_urb);
+        input_unregister_device(ati_remote->idev);
+        ati_remote_free_buffers(ati_remote);
+        kfree(ati_remote);
 }
 
 /*