[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, 87 insertions, 123 deletions

diff --git a/drivers/usb/input/keyspan_remote.c b/drivers/usb/input/keyspan_remote.c
index 99de1b33c07d..5b8d65f62abf 100644
--- a/drivers/usb/input/keyspan_remote.c
+++ b/drivers/usb/input/keyspan_remote.c
@@ -20,6 +20,7 @@
 #include <linux/moduleparam.h>
 #include <linux/input.h>
 #include <linux/usb.h>
+#include <linux/usb_input.h>
 
 #define DRIVER_VERSION  "v0.1"
 #define DRIVER_AUTHOR   "Michael Downey <downey@zymeta.com>"
@@ -75,7 +76,7 @@ struct usb_keyspan {
         char                            name[128];
         char                            phys[64];
         struct usb_device*              udev;
-        struct input_dev                input;
+        struct input_dev                *input;
         struct usb_interface*           interface;
         struct usb_endpoint_descriptor* in_endpoint;
         struct urb*                     irq_urb;
@@ -136,12 +137,11 @@ static struct usb_driver keyspan_driver;
  */
 static void keyspan_print(struct usb_keyspan* dev) /*unsigned char* data)*/
 {
-        char codes[4*RECV_SIZE];
+        char codes[4 * RECV_SIZE];
         int i;
 
-        for (i = 0; i < RECV_SIZE; i++) {
-                snprintf(codes+i*3, 4, "%02x ", dev->in_buffer[i]);
-        }
+        for (i = 0; i < RECV_SIZE; i++)
+                snprintf(codes + i * 3, 4, "%02x ", dev->in_buffer[i]);
 
         dev_info(&dev->udev->dev, "%s\n", codes);
 }
@@ -153,7 +153,7 @@ static void keyspan_print(struct usb_keyspan* dev) /*unsigned char* data)*/
 static int keyspan_load_tester(struct usb_keyspan* dev, int bits_needed)
 {
         if (dev->data.bits_left >= bits_needed)
-                return(0);
+                return 0;
 
         /*
          * Somehow we've missed the last message. The message will be repeated
@@ -162,7 +162,7 @@ static int keyspan_load_tester(struct usb_keyspan* dev, int bits_needed)
         if (dev->data.pos >= dev->data.len) {
                 dev_dbg(&dev->udev, "%s - Error ran out of data. pos: %d, len: %d\n",
                         __FUNCTION__, dev->data.pos, dev->data.len);
-                return(-1);
+                return -1;
         }
 
         /* Load as much as we can into the tester. */
@@ -172,7 +172,7 @@ static int keyspan_load_tester(struct usb_keyspan* dev, int bits_needed)
                 dev->data.bits_left += 8;
         }
 
-        return(0);
+        return 0;
 }
 
 /*
@@ -311,10 +311,10 @@ static void keyspan_check_data(struct usb_keyspan *remote, struct pt_regs *regs)
                         __FUNCTION__, message.system, message.button, message.toggle);
 
                 if (message.toggle != remote->toggle) {
-                        input_regs(&remote->input, regs);
-                        input_report_key(&remote->input, keyspan_key_table[message.button], 1);
-                        input_report_key(&remote->input, keyspan_key_table[message.button], 0);
-                        input_sync(&remote->input);
+                        input_regs(remote->input, regs);
+                        input_report_key(remote->input, keyspan_key_table[message.button], 1);
+                        input_report_key(remote->input, keyspan_key_table[message.button], 0);
+                        input_sync(remote->input);
                         remote->toggle = message.toggle;
                 }
 
@@ -397,14 +397,9 @@ static int keyspan_open(struct input_dev *dev)
 {
         struct usb_keyspan *remote = dev->private;
 
-        if (remote->open++)
-                return 0;
-
         remote->irq_urb->dev = remote->udev;
-        if (usb_submit_urb(remote->irq_urb, GFP_KERNEL)) {
-                remote->open--;
+        if (usb_submit_urb(remote->irq_urb, GFP_KERNEL))
                 return -EIO;
-        }
 
         return 0;
 }
@@ -413,8 +408,26 @@ static void keyspan_close(struct input_dev *dev)
 {
         struct usb_keyspan *remote = dev->private;
 
-        if (!--remote->open)
-                usb_kill_urb(remote->irq_urb);
+        usb_kill_urb(remote->irq_urb);
+}
+
+static struct usb_endpoint_descriptor *keyspan_get_in_endpoint(struct usb_host_interface *iface)
+{
+
+        struct usb_endpoint_descriptor *endpoint;
+        int i;
+
+        for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
+                endpoint = &iface->endpoint[i].desc;
+
+                if ((endpoint->bEndpointAddress & USB_DIR_IN) &&
+                    ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) {
+                        /* we found our interrupt in endpoint */
+                        return endpoint;
+                }
+        }
+
+        return NULL;
 }
 
 /*
@@ -422,110 +435,78 @@ static void keyspan_close(struct input_dev *dev)
  */
 static int keyspan_probe(struct usb_interface *interface, const struct usb_device_id *id)
 {
-        int i;
-        int retval = -ENOMEM;
-        char path[64];
-        char *buf;
-        struct usb_keyspan *remote = NULL;
-        struct usb_host_interface *iface_desc;
+        struct usb_device *udev = interface_to_usbdev(interface);
         struct usb_endpoint_descriptor *endpoint;
-        struct usb_device *udev = usb_get_dev(interface_to_usbdev(interface));
+        struct usb_keyspan *remote;
+        struct input_dev *input_dev;
+        int i, retval;
 
-        /* allocate memory for our device state and initialize it */
-        remote = kmalloc(sizeof(*remote), GFP_KERNEL);
-        if (remote == NULL) {
-                err("Out of memory\n");
-                goto error;
+        endpoint = keyspan_get_in_endpoint(interface->cur_altsetting);
+        if (!endpoint)
+                return -ENODEV;
+
+        remote = kzalloc(sizeof(*remote), GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!remote || !input_dev) {
+                retval = -ENOMEM;
+                goto fail1;
         }
-        memset(remote, 0x00, sizeof(*remote));
 
         remote->udev = udev;
+        remote->input = input_dev;
         remote->interface = interface;
+        remote->in_endpoint = endpoint;
         remote->toggle = -1;    /* Set to -1 so we will always not match the toggle from the first remote message. */
 
-        /* set up the endpoint information */
-        /* use only the first in interrupt endpoint */
-        iface_desc = interface->cur_altsetting;
-        for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
-                endpoint = &iface_desc->endpoint[i].desc;
-
-                if (!remote->in_endpoint &&
-                    (endpoint->bEndpointAddress & USB_DIR_IN) &&
-                    ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) {
-                        /* we found our interrupt in endpoint */
-                        remote->in_endpoint = endpoint;
-
-                        remote->in_buffer = usb_buffer_alloc(remote->udev, RECV_SIZE, SLAB_ATOMIC, &remote->in_dma);
-                        if (!remote->in_buffer) {
-                                retval = -ENOMEM;
-                                goto error;
-                        }
-                }
-        }
-
-        if (!remote->in_endpoint) {
-                err("Could not find interrupt input endpoint.\n");
-                retval = -ENODEV;
-                goto error;
+        remote->in_buffer = usb_buffer_alloc(udev, RECV_SIZE, SLAB_ATOMIC, &remote->in_dma);
+        if (!remote->in_buffer) {
+                retval = -ENOMEM;
+                goto fail1;
         }
 
         remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
         if (!remote->irq_urb) {
-                err("Failed to allocate urb.\n");
                 retval = -ENOMEM;
-                goto error;
+                goto fail2;
         }
 
-        retval = keyspan_setup(remote->udev);
+        retval = keyspan_setup(udev);
         if (retval) {
-                err("Failed to setup device.\n");
                 retval = -ENODEV;
-                goto error;
-        }
-
-        /*
-         * Setup the input system with the bits we are going to be reporting
-         */
-        remote->input.evbit[0] = BIT(EV_KEY);           /* We will only report KEY events. */
-        for (i = 0; i < 32; ++i) {
-                if (keyspan_key_table[i] != KEY_RESERVED) {
-                        set_bit(keyspan_key_table[i], remote->input.keybit);
-                }
+                goto fail3;
         }
 
-        remote->input.private = remote;
-        remote->input.open = keyspan_open;
-        remote->input.close = keyspan_close;
-
-        usb_make_path(remote->udev, path, 64);
-        sprintf(remote->phys, "%s/input0", path);
+        if (udev->manufacturer)
+                strlcpy(remote->name, udev->manufacturer, sizeof(remote->name));
 
-        remote->input.name = remote->name;
-        remote->input.phys = remote->phys;
-        remote->input.id.bustype = BUS_USB;
-        remote->input.id.vendor = le16_to_cpu(remote->udev->descriptor.idVendor);
-        remote->input.id.product = le16_to_cpu(remote->udev->descriptor.idProduct);
-        remote->input.id.version = le16_to_cpu(remote->udev->descriptor.bcdDevice);
-
-        if (!(buf = kmalloc(63, GFP_KERNEL))) {
-                usb_buffer_free(remote->udev, RECV_SIZE, remote->in_buffer, remote->in_dma);
-                kfree(remote);
-                return -ENOMEM;
+        if (udev->product) {
+                if (udev->manufacturer)
+                        strlcat(remote->name, " ", sizeof(remote->name));
+                strlcat(remote->name, udev->product, sizeof(remote->name));
         }
 
-        if (remote->udev->descriptor.iManufacturer &&
-            usb_string(remote->udev, remote->udev->descriptor.iManufacturer, buf, 63) > 0)
-                strcat(remote->name, buf);
+        if (!strlen(remote->name))
+                snprintf(remote->name, sizeof(remote->name),
+                         "USB Keyspan Remote %04x:%04x",
+                         le16_to_cpu(udev->descriptor.idVendor),
+                         le16_to_cpu(udev->descriptor.idProduct));
 
-        if (remote->udev->descriptor.iProduct &&
-            usb_string(remote->udev, remote->udev->descriptor.iProduct, buf, 63) > 0)
-                sprintf(remote->name, "%s %s", remote->name, buf);
+        usb_make_path(udev, remote->phys, sizeof(remote->phys));
+        strlcat(remote->phys, "/input0", sizeof(remote->phys));
 
-        if (!strlen(remote->name))
-                sprintf(remote->name, "USB Keyspan Remote %04x:%04x",
-                        remote->input.id.vendor, remote->input.id.product);
+        input_dev->name = remote->name;
+        input_dev->phys = remote->phys;
+        usb_to_input_id(udev, &input_dev->id);
+        input_dev->cdev.dev = &interface->dev;
 
-        kfree(buf);
+        input_dev->evbit[0] = BIT(EV_KEY);              /* We will only report KEY events. */
+        for (i = 0; i < ARRAY_SIZE(keyspan_key_table); i++)
+                if (keyspan_key_table[i] != KEY_RESERVED)
+                        set_bit(keyspan_key_table[i], input_dev->keybit);
+
+        input_dev->private = remote;
+        input_dev->open = keyspan_open;
+        input_dev->close = keyspan_close;
 
         /*
          * Initialize the URB to access the device. The urb gets sent to the device in keyspan_open()
@@ -538,27 +519,17 @@ static int keyspan_probe(struct usb_interface *interface, const struct usb_devic
         remote->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 
         /* we can register the device now, as it is ready */
-        input_register_device(&remote->input);
+        input_register_device(remote->input);
 
         /* save our data pointer in this interface device */
         usb_set_intfdata(interface, remote);
 
-        /* let the user know what node this device is now attached to */
-        info("connected: %s on %s", remote->name, path);
         return 0;
 
-error:
-        /*
-         * In case of error we need to clean up any allocated buffers
-         */
-        if (remote->irq_urb)
-                usb_free_urb(remote->irq_urb);
-
-        if (remote->in_buffer)
-                usb_buffer_free(remote->udev, RECV_SIZE, remote->in_buffer, remote->in_dma);
-
-        if (remote)
-                kfree(remote);
+ fail3: usb_free_urb(remote->irq_urb);
+ fail2: usb_buffer_free(udev, RECV_SIZE, remote->in_buffer, remote->in_dma);
+ fail1: kfree(remote);
+        input_free_device(input_dev);
 
         return retval;
 }
@@ -570,23 +541,16 @@ static void keyspan_disconnect(struct usb_interface *interface)
 {
         struct usb_keyspan *remote;
 
-        /* prevent keyspan_open() from racing keyspan_disconnect() */
-        lock_kernel();
-
         remote = usb_get_intfdata(interface);
         usb_set_intfdata(interface, NULL);
 
         if (remote) {   /* We have a valid driver structure so clean up everything we allocated. */
-                input_unregister_device(&remote->input);
+                input_unregister_device(remote->input);
                 usb_kill_urb(remote->irq_urb);
                 usb_free_urb(remote->irq_urb);
-                usb_buffer_free(interface_to_usbdev(interface), RECV_SIZE, remote->in_buffer, remote->in_dma);
+                usb_buffer_free(remote->udev, RECV_SIZE, remote->in_buffer, remote->in_dma);
                 kfree(remote);
         }
-
-        unlock_kernel();
-
-        info("USB Keyspan now disconnected");
 }
 
 /*