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authorJiri Slaby <jirislaby@gmail.com>2008-05-16 11:49:16 +0200
committerJiri Kosina <jkosina@suse.cz>2008-10-14 23:50:48 +0200
commitc500c9714011edab021591340042787722db9cf0 (patch)
treed6bb0fe483c9f1c71c3d757e9c13d261ca01cd5f /drivers
parent85cdaf524b7ddab627e7d15405693f2511ef7505 (diff)
downloadlinux-2.6.38-lt-ux500-c500c9714011edab021591340042787722db9cf0.tar.gz
HID: hid, make parsing event driven
Next step for complete hid bus, this patch includes: - call parser either from probe or from hid-core if there is no probe. - add ll_driver structure and centralize some stuff there (open, close...) - split and merge usb_hid_configure and hid_probe into several functions to allow hooks/fixes between them Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/hid/hid-core.c24
-rw-r--r--drivers/hid/hid-input.c20
-rw-r--r--drivers/hid/hidraw.c6
-rw-r--r--drivers/hid/usbhid/hid-core.c330
4 files changed, 228 insertions, 152 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 017fc20167d..3dacbcd7e41 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -648,6 +648,9 @@ int hid_parse_report(struct hid_device *device, __u8 *start,
hid_parser_reserved
};
+ if (device->driver->report_fixup)
+ device->driver->report_fixup(device, start, size);
+
device->rdesc = kmalloc(size, GFP_KERNEL);
if (device->rdesc == NULL)
return -ENOMEM;
@@ -1152,15 +1155,20 @@ static int hid_device_probe(struct device *dev)
int ret = 0;
if (!hdev->driver) {
- if (hdrv->probe) {
- ret = -ENODEV;
+ id = hid_match_id(hdev, hdrv->id_table);
+ if (id == NULL)
+ return -ENODEV;
- id = hid_match_id(hdev, hdrv->id_table);
- if (id)
- ret = hdrv->probe(hdev, id);
+ hdev->driver = hdrv;
+ if (hdrv->probe) {
+ ret = hdrv->probe(hdev, id);
+ } else { /* default probe */
+ ret = hid_parse(hdev);
+ if (!ret)
+ ret = hid_hw_start(hdev);
}
- if (!ret)
- hdev->driver = hdrv;
+ if (ret)
+ hdev->driver = NULL;
}
return ret;
}
@@ -1173,6 +1181,8 @@ static int hid_device_remove(struct device *dev)
if (hdrv) {
if (hdrv->remove)
hdrv->remove(hdev);
+ else /* default remove */
+ hid_hw_stop(hdev);
hdev->driver = NULL;
}
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 4ae5603804e..9fa7239ab31 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -390,6 +390,15 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
if (ret)
goto mapped;
+ if (device->driver->input_mapping) {
+ int ret = device->driver->input_mapping(device, hidinput, field,
+ usage, &bit, &max);
+ if (ret > 0)
+ goto mapped;
+ if (ret < 0)
+ goto ignore;
+ }
+
switch (usage->hid & HID_USAGE_PAGE) {
case HID_UP_UNDEFINED:
@@ -755,6 +764,10 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
}
mapped:
+ if (device->driver->input_mapped && device->driver->input_mapped(device,
+ hidinput, field, usage, &bit, &max) < 0)
+ goto ignore;
+
if (device->quirks & HID_QUIRK_MIGHTYMOUSE) {
if (usage->hid == HID_GD_Z)
map_rel(REL_HWHEEL);
@@ -961,14 +974,14 @@ static int hidinput_open(struct input_dev *dev)
{
struct hid_device *hid = input_get_drvdata(dev);
- return hid->hid_open(hid);
+ return hid->ll_driver->open(hid);
}
static void hidinput_close(struct input_dev *dev)
{
struct hid_device *hid = input_get_drvdata(dev);
- hid->hid_close(hid);
+ hid->ll_driver->close(hid);
}
/*
@@ -1019,7 +1032,8 @@ int hidinput_connect(struct hid_device *hid)
}
input_set_drvdata(input_dev, hid);
- input_dev->event = hid->hidinput_input_event;
+ input_dev->event =
+ hid->ll_driver->hidinput_input_event;
input_dev->open = hidinput_open;
input_dev->close = hidinput_close;
input_dev->setkeycode = hidinput_setkeycode;
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index c40f0403eda..4be240e74d4 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -181,7 +181,7 @@ static int hidraw_open(struct inode *inode, struct file *file)
dev = hidraw_table[minor];
if (!dev->open++)
- dev->hid->hid_open(dev->hid);
+ dev->hid->ll_driver->open(dev->hid);
out_unlock:
spin_unlock(&minors_lock);
@@ -207,7 +207,7 @@ static int hidraw_release(struct inode * inode, struct file * file)
dev = hidraw_table[minor];
if (!dev->open--) {
if (list->hidraw->exist)
- dev->hid->hid_close(dev->hid);
+ dev->hid->ll_driver->close(dev->hid);
else
kfree(list->hidraw);
}
@@ -367,7 +367,7 @@ void hidraw_disconnect(struct hid_device *hid)
device_destroy(hidraw_class, MKDEV(hidraw_major, hidraw->minor));
if (hidraw->open) {
- hid->hid_close(hid);
+ hid->ll_driver->close(hid);
wake_up_interruptible(&hidraw->wait);
} else {
kfree(hidraw);
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 5955d05ae54..d2a3461909a 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -701,17 +701,84 @@ static void hid_fixup_sony_ps3_controller(struct usb_device *dev, int ifnum)
kfree(buf);
}
-static struct hid_device *usb_hid_configure(struct usb_interface *intf)
+static int usbhid_start_finish(struct hid_device *hid)
{
+ struct usb_interface *intf = to_usb_interface(hid->dev.parent);
+ char path[64], *type;
+ unsigned int i;
+
+ usbhid_init_reports(hid);
+ hid_dump_device(hid);
+ if (hid->quirks & HID_QUIRK_RESET_LEDS)
+ usbhid_set_leds(hid);
+
+ if (!hidinput_connect(hid))
+ hid->claimed |= HID_CLAIMED_INPUT;
+ if (!hiddev_connect(hid))
+ hid->claimed |= HID_CLAIMED_HIDDEV;
+ if (!hidraw_connect(hid))
+ hid->claimed |= HID_CLAIMED_HIDRAW;
+
+ if (!hid->claimed) {
+ printk(KERN_ERR "HID device claimed by neither input, hiddev "
+ "nor hidraw\n");
+ return -ENODEV;
+ }
+
+ if ((hid->claimed & HID_CLAIMED_INPUT))
+ hid_ff_init(hid);
+
+ if (hid->quirks & HID_QUIRK_SONY_PS3_CONTROLLER)
+ hid_fixup_sony_ps3_controller(interface_to_usbdev(intf),
+ intf->cur_altsetting->desc.bInterfaceNumber);
+
+ printk(KERN_INFO);
+
+ if (hid->claimed & HID_CLAIMED_INPUT)
+ printk("input");
+ if ((hid->claimed & HID_CLAIMED_INPUT) &&
+ ((hid->claimed & HID_CLAIMED_HIDDEV) ||
+ hid->claimed & HID_CLAIMED_HIDRAW))
+ printk(",");
+ if (hid->claimed & HID_CLAIMED_HIDDEV)
+ printk("hiddev%d", hid->minor);
+ if ((hid->claimed & HID_CLAIMED_INPUT) &&
+ (hid->claimed & HID_CLAIMED_HIDDEV) &&
+ (hid->claimed & HID_CLAIMED_HIDRAW))
+ printk(",");
+ if (hid->claimed & HID_CLAIMED_HIDRAW)
+ printk("hidraw%d", ((struct hidraw *)hid->hidraw)->minor);
+
+ type = "Device";
+ for (i = 0; i < hid->maxcollection; i++) {
+ if (hid->collection[i].type == HID_COLLECTION_APPLICATION &&
+ (hid->collection[i].usage & HID_USAGE_PAGE) ==
+ HID_UP_GENDESK &&
+ (hid->collection[i].usage & 0xffff) <
+ ARRAY_SIZE(hid_types)) {
+ type = hid_types[hid->collection[i].usage & 0xffff];
+ break;
+ }
+ }
+
+ usb_make_path(interface_to_usbdev(intf), path, 63);
+
+ printk(": USB HID v%x.%02x %s [%s] on %s\n",
+ hid->version >> 8, hid->version & 0xff, type, hid->name, path);
+
+ return 0;
+}
+
+static int usbhid_parse(struct hid_device *hid)
+{
+ struct usb_interface *intf = to_usb_interface(hid->dev.parent);
struct usb_host_interface *interface = intf->cur_altsetting;
struct usb_device *dev = interface_to_usbdev (intf);
struct hid_descriptor *hdesc;
- struct hid_device *hid;
u32 quirks = 0;
- unsigned int insize = 0, rsize = 0;
+ unsigned int rsize = 0;
char *rdesc;
- int n, len;
- struct usbhid_device *usbhid;
+ int ret, n;
quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
le16_to_cpu(dev->descriptor.idProduct));
@@ -725,40 +792,44 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
}
if (quirks & HID_QUIRK_IGNORE)
- return NULL;
+ return -ENODEV;
if ((quirks & HID_QUIRK_IGNORE_MOUSE) &&
(interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE))
- return NULL;
-
+ return -ENODEV;
if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
(!interface->desc.bNumEndpoints ||
usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
dbg_hid("class descriptor not present\n");
- return NULL;
+ return -ENODEV;
}
+ hid->version = le16_to_cpu(hdesc->bcdHID);
+ hid->country = hdesc->bCountryCode;
+
for (n = 0; n < hdesc->bNumDescriptors; n++)
if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
dbg_hid("weird size of report descriptor (%u)\n", rsize);
- return NULL;
+ return -EINVAL;
}
if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
dbg_hid("couldn't allocate rdesc memory\n");
- return NULL;
+ return -ENOMEM;
}
hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
- if ((n = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, HID_DT_REPORT, rdesc, rsize)) < 0) {
+ ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
+ HID_DT_REPORT, rdesc, rsize);
+ if (ret < 0) {
dbg_hid("reading report descriptor failed\n");
kfree(rdesc);
- return NULL;
+ goto err;
}
usbhid_fixup_report_descriptor(le16_to_cpu(dev->descriptor.idVendor),
@@ -770,24 +841,36 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
dbg_hid_line("\n");
- hid = hid_allocate_device();
- if (IS_ERR(hid)) {
- kfree(rdesc);
- return NULL;
- }
-
- if (hid_parse_report(hid, rdesc, n)) {
+ ret = hid_parse_report(hid, rdesc, rsize);
+ kfree(rdesc);
+ if (ret) {
dbg_hid("parsing report descriptor failed\n");
- hid_destroy_device(hid);
- kfree(rdesc);
- return NULL;
+ goto err;
}
- kfree(rdesc);
hid->quirks = quirks;
- if (!(usbhid = kzalloc(sizeof(struct usbhid_device), GFP_KERNEL)))
- goto fail_no_usbhid;
+ return 0;
+err:
+ return ret;
+}
+
+static int usbhid_start(struct hid_device *hid)
+{
+ struct usb_interface *intf = to_usb_interface(hid->dev.parent);
+ struct usb_host_interface *interface = intf->cur_altsetting;
+ struct usb_device *dev = interface_to_usbdev(intf);
+ struct usbhid_device *usbhid;
+ unsigned int n, insize = 0;
+ int ret;
+
+ WARN_ON(hid->driver_data);
+
+ usbhid = kzalloc(sizeof(struct usbhid_device), GFP_KERNEL);
+ if (usbhid == NULL) {
+ ret = -ENOMEM;
+ goto err;
+ }
hid->driver_data = usbhid;
usbhid->hid = hid;
@@ -805,27 +888,12 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
if (insize > HID_MAX_BUFFER_SIZE)
insize = HID_MAX_BUFFER_SIZE;
- if (hid_alloc_buffers(dev, hid))
+ if (hid_alloc_buffers(dev, hid)) {
+ ret = -ENOMEM;
goto fail;
-
- hid->name[0] = 0;
-
- if (dev->manufacturer)
- strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
-
- if (dev->product) {
- if (dev->manufacturer)
- strlcat(hid->name, " ", sizeof(hid->name));
- strlcat(hid->name, dev->product, sizeof(hid->name));
}
- if (!strlen(hid->name))
- snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
- le16_to_cpu(dev->descriptor.idVendor),
- le16_to_cpu(dev->descriptor.idProduct));
-
for (n = 0; n < interface->desc.bNumEndpoints; n++) {
-
struct usb_endpoint_descriptor *endpoint;
int pipe;
int interval;
@@ -837,7 +905,7 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
interval = endpoint->bInterval;
/* Some vendors give fullspeed interval on highspeed devides */
- if (quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
+ if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
dev->speed == USB_SPEED_HIGH) {
interval = fls(endpoint->bInterval*8);
printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
@@ -848,6 +916,7 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
interval = hid_mousepoll_interval;
+ ret = -ENOMEM;
if (usb_endpoint_dir_in(endpoint)) {
if (usbhid->urbin)
continue;
@@ -873,6 +942,7 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
if (!usbhid->urbin) {
err_hid("couldn't find an input interrupt endpoint");
+ ret = -ENODEV;
goto fail;
}
@@ -884,44 +954,26 @@ static struct hid_device *usb_hid_configure(struct usb_interface *intf)
spin_lock_init(&usbhid->outlock);
spin_lock_init(&usbhid->ctrllock);
- hid->version = le16_to_cpu(hdesc->bcdHID);
- hid->country = hdesc->bCountryCode;
- hid->dev.parent = &intf->dev;
usbhid->intf = intf;
usbhid->ifnum = interface->desc.bInterfaceNumber;
- hid->bus = BUS_USB;
- hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
- hid->product = le16_to_cpu(dev->descriptor.idProduct);
-
- usb_make_path(dev, hid->phys, sizeof(hid->phys));
- strlcat(hid->phys, "/input", sizeof(hid->phys));
- len = strlen(hid->phys);
- if (len < sizeof(hid->phys) - 1)
- snprintf(hid->phys + len, sizeof(hid->phys) - len,
- "%d", intf->altsetting[0].desc.bInterfaceNumber);
-
- if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
- hid->uniq[0] = 0;
-
usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
- if (!usbhid->urbctrl)
+ if (!usbhid->urbctrl) {
+ ret = -ENOMEM;
goto fail;
+ }
usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
usbhid->ctrlbuf, 1, hid_ctrl, hid);
usbhid->urbctrl->setup_dma = usbhid->cr_dma;
usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
- hid->hidinput_input_event = usb_hidinput_input_event;
- hid->hid_open = usbhid_open;
- hid->hid_close = usbhid_close;
-#ifdef CONFIG_USB_HIDDEV
- hid->hiddev_hid_event = hiddev_hid_event;
- hid->hiddev_report_event = hiddev_report_event;
-#endif
- hid->hid_output_raw_report = usbhid_output_raw_report;
- return hid;
+
+ ret = usbhid_start_finish(hid);
+ if (ret)
+ goto fail;
+
+ return 0;
fail:
usb_free_urb(usbhid->urbin);
@@ -929,24 +981,18 @@ fail:
usb_free_urb(usbhid->urbctrl);
hid_free_buffers(dev, hid);
kfree(usbhid);
-fail_no_usbhid:
- hid_destroy_device(hid);
-
- return NULL;
+err:
+ return ret;
}
-static void hid_disconnect(struct usb_interface *intf)
+static void usbhid_stop(struct hid_device *hid)
{
- struct hid_device *hid = usb_get_intfdata (intf);
- struct usbhid_device *usbhid;
+ struct usbhid_device *usbhid = hid->driver_data;
- if (!hid)
+ if (WARN_ON(!usbhid))
return;
- usbhid = hid->driver_data;
-
spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
- usb_set_intfdata(intf, NULL);
set_bit(HID_DISCONNECTED, &usbhid->iofl);
spin_unlock_irq(&usbhid->inlock);
usb_kill_urb(usbhid->urbin);
@@ -963,93 +1009,99 @@ static void hid_disconnect(struct usb_interface *intf)
if (hid->claimed & HID_CLAIMED_HIDRAW)
hidraw_disconnect(hid);
+ hid->claimed = 0;
+
usb_free_urb(usbhid->urbin);
usb_free_urb(usbhid->urbctrl);
usb_free_urb(usbhid->urbout);
hid_free_buffers(hid_to_usb_dev(hid), hid);
kfree(usbhid);
- hid_destroy_device(hid);
+ hid->driver_data = NULL;
}
+static struct hid_ll_driver usb_hid_driver = {
+ .parse = usbhid_parse,
+ .start = usbhid_start,
+ .stop = usbhid_stop,
+ .open = usbhid_open,
+ .close = usbhid_close,
+ .hidinput_input_event = usb_hidinput_input_event,
+};
+
static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
+ struct usb_device *dev = interface_to_usbdev(intf);
struct hid_device *hid;
- char path[64];
- int i, ret;
- char *c;
+ size_t len;
+ int ret;
dbg_hid("HID probe called for ifnum %d\n",
intf->altsetting->desc.bInterfaceNumber);
- if (!(hid = usb_hid_configure(intf)))
- return -ENODEV;
-
- usbhid_init_reports(hid);
- hid_dump_device(hid);
- if (hid->quirks & HID_QUIRK_RESET_LEDS)
- usbhid_set_leds(hid);
-
- if (!hidinput_connect(hid))
- hid->claimed |= HID_CLAIMED_INPUT;
- if (!hiddev_connect(hid))
- hid->claimed |= HID_CLAIMED_HIDDEV;
- if (!hidraw_connect(hid))
- hid->claimed |= HID_CLAIMED_HIDRAW;
+ hid = hid_allocate_device();
+ if (IS_ERR(hid))
+ return PTR_ERR(hid);
usb_set_intfdata(intf, hid);
+ hid->ll_driver = &usb_hid_driver;
+ hid->hid_output_raw_report = usbhid_output_raw_report;
+#ifdef CONFIG_USB_HIDDEV
+ hid->hiddev_hid_event = hiddev_hid_event;
+ hid->hiddev_report_event = hiddev_report_event;
+#endif
+ hid->dev.parent = &intf->dev;
+ hid->bus = BUS_USB;
+ hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
+ hid->product = le16_to_cpu(dev->descriptor.idProduct);
+ hid->name[0] = 0;
- if (!hid->claimed) {
- printk ("HID device claimed by neither input, hiddev nor hidraw\n");
- hid_disconnect(intf);
- return -ENODEV;
- }
-
- if ((hid->claimed & HID_CLAIMED_INPUT))
- hid_ff_init(hid);
-
- if (hid->quirks & HID_QUIRK_SONY_PS3_CONTROLLER)
- hid_fixup_sony_ps3_controller(interface_to_usbdev(intf),
- intf->cur_altsetting->desc.bInterfaceNumber);
-
- printk(KERN_INFO);
-
- if (hid->claimed & HID_CLAIMED_INPUT)
- printk("input");
- if ((hid->claimed & HID_CLAIMED_INPUT) && ((hid->claimed & HID_CLAIMED_HIDDEV) ||
- hid->claimed & HID_CLAIMED_HIDRAW))
- printk(",");
- if (hid->claimed & HID_CLAIMED_HIDDEV)
- printk("hiddev%d", hid->minor);
- if ((hid->claimed & HID_CLAIMED_INPUT) && (hid->claimed & HID_CLAIMED_HIDDEV) &&
- (hid->claimed & HID_CLAIMED_HIDRAW))
- printk(",");
- if (hid->claimed & HID_CLAIMED_HIDRAW)
- printk("hidraw%d", ((struct hidraw*)hid->hidraw)->minor);
+ if (dev->manufacturer)
+ strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
- c = "Device";
- for (i = 0; i < hid->maxcollection; i++) {
- if (hid->collection[i].type == HID_COLLECTION_APPLICATION &&
- (hid->collection[i].usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
- (hid->collection[i].usage & 0xffff) < ARRAY_SIZE(hid_types)) {
- c = hid_types[hid->collection[i].usage & 0xffff];
- break;
- }
+ if (dev->product) {
+ if (dev->manufacturer)
+ strlcat(hid->name, " ", sizeof(hid->name));
+ strlcat(hid->name, dev->product, sizeof(hid->name));
}
- usb_make_path(interface_to_usbdev(intf), path, 63);
+ if (!strlen(hid->name))
+ snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
+ le16_to_cpu(dev->descriptor.idVendor),
+ le16_to_cpu(dev->descriptor.idProduct));
- printk(": USB HID v%x.%02x %s [%s] on %s\n",
- hid->version >> 8, hid->version & 0xff, c, hid->name, path);
+ usb_make_path(dev, hid->phys, sizeof(hid->phys));
+ strlcat(hid->phys, "/input", sizeof(hid->phys));
+ len = strlen(hid->phys);
+ if (len < sizeof(hid->phys) - 1)
+ snprintf(hid->phys + len, sizeof(hid->phys) - len,
+ "%d", intf->altsetting[0].desc.bInterfaceNumber);
+
+ if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
+ hid->uniq[0] = 0;
ret = hid_add_device(hid);
if (ret) {
dev_err(&intf->dev, "can't add hid device: %d\n", ret);
- hid_disconnect(intf);
+ goto err;
}
+
+ return 0;
+err:
+ hid_destroy_device(hid);
return ret;
}
+static void hid_disconnect(struct usb_interface *intf)
+{
+ struct hid_device *hid = usb_get_intfdata(intf);
+
+ if (WARN_ON(!hid))
+ return;
+
+ hid_destroy_device(hid);
+}
+
static int hid_suspend(struct usb_interface *intf, pm_message_t message)
{
struct hid_device *hid = usb_get_intfdata (intf);