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Commit fc73697b authored by Jiri Kosina's avatar Jiri Kosina
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Merge branch 'upstream' into for-linus 

Conflicts:
	drivers/hid/hid-ids.h
parents 1c5474a6 8c8b01c3
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Showing with 276 additions and 74 deletions
drivers/hid/Kconfig
View file @ fc73697b
......@@ -148,6 +148,12 @@ config HID_EGALAX
---help---
Support for the eGalax dual-touch panel.
config HID_ELECOM
tristate "ELECOM"
depends on BT_HIDP
---help---
Support for the ELECOM BM084 (bluetooth mouse).
config HID_EZKEY
tristate "Ezkey" if EMBEDDED
depends on USB_HID
......
drivers/hid/Makefile
View file @ fc73697b
......@@ -32,6 +32,7 @@ obj-$(CONFIG_HID_CHICONY) += hid-chicony.o
obj-$(CONFIG_HID_CYPRESS) += hid-cypress.o
obj-$(CONFIG_HID_DRAGONRISE) += hid-drff.o
obj-$(CONFIG_HID_EGALAX) += hid-egalax.o
obj-$(CONFIG_HID_ELECOM) += hid-elecom.o
obj-$(CONFIG_HID_EZKEY) += hid-ezkey.o
obj-$(CONFIG_HID_GYRATION) += hid-gyration.o
obj-$(CONFIG_HID_KENSINGTON) += hid-kensington.o
......
drivers/hid/hid-core.c
View file @ fc73697b
......@@ -1294,6 +1294,7 @@ static const struct hid_device_id hid_blacklist[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, USB_DEVICE_ID_CYPRESS_MOUSE) },
{ HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006) },
{ HID_USB_DEVICE(USB_VENDOR_ID_DWAV, USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084) },
{ HID_USB_DEVICE(USB_VENDOR_ID_EZKEY, USB_DEVICE_ID_BTC_8193) },
{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR) },
{ HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR) },
......
drivers/hid/hid-elecom.c 0 → 100644
View file @ fc73697b
/*
* HID driver for Elecom BM084 (bluetooth mouse).
* Removes a non-existing horizontal wheel from
* the HID descriptor.
* (This module is based on "hid-ortek".)
*
* Copyright (c) 2010 Richard Nauber <Richard.Nauber@gmail.com>
*/
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*/
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/module.h>
#include "hid-ids.h"
static void elecom_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int rsize)
{
if (rsize >= 48 && rdesc[46] == 0x05 && rdesc[47] == 0x0c) {
dev_info(&hdev->dev, "Fixing up Elecom BM084 "
"report descriptor.\n");
rdesc[47] = 0x00;
}
}
static const struct hid_device_id elecom_devices[] = {
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ELECOM, USB_DEVICE_ID_ELECOM_BM084)},
{ }
};
MODULE_DEVICE_TABLE(hid, elecom_devices);
static struct hid_driver elecom_driver = {
.name = "elecom",
.id_table = elecom_devices,
.report_fixup = elecom_report_fixup
};
static int __init elecom_init(void)
{
return hid_register_driver(&elecom_driver);
}
static void __exit elecom_exit(void)
{
hid_unregister_driver(&elecom_driver);
}
module_init(elecom_init);
module_exit(elecom_exit);
MODULE_LICENSE("GPL");
drivers/hid/hid-ids.h
View file @ fc73697b
......@@ -187,18 +187,21 @@
#define USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER 0x0001
#define USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH 0x480d
#define USB_VENDOR_ID_ELECOM 0x056e
#define USB_DEVICE_ID_ELECOM_BM084 0x0061
#define USB_VENDOR_ID_ELO 0x04E7
#define USB_DEVICE_ID_ELO_TS2700 0x0020
#define USB_VENDOR_ID_ESSENTIAL_REALITY 0x0d7f
#define USB_DEVICE_ID_ESSENTIAL_REALITY_P5 0x0100
#define USB_VENDOR_ID_ETURBOTOUCH 0x22b9
#define USB_DEVICE_ID_ETURBOTOUCH 0x0006
#define USB_VENDOR_ID_ETT 0x0664
#define USB_DEVICE_ID_TC5UH 0x0309
#define USB_VENDOR_ID_ETURBOTOUCH 0x22b9
#define USB_DEVICE_ID_ETURBOTOUCH 0x0006
#define USB_VENDOR_ID_EZKEY 0x0518
#define USB_DEVICE_ID_BTC_8193 0x0002
......@@ -296,9 +299,16 @@
#define USB_VENDOR_ID_KBGEAR 0x084e
#define USB_DEVICE_ID_KBGEAR_JAMSTUDIO 0x1001
#define USB_VENDOR_ID_KENSINGTON 0x047d
#define USB_DEVICE_ID_KS_SLIMBLADE 0x2041
#define USB_VENDOR_ID_KWORLD 0x1b80
#define USB_DEVICE_ID_KWORLD_RADIO_FM700 0xd700
#define USB_VENDOR_ID_KYE 0x0458
#define USB_DEVICE_ID_KYE_ERGO_525V 0x0087
#define USB_DEVICE_ID_KYE_GPEN_560 0x5003
#define USB_VENDOR_ID_LABTEC 0x1020
#define USB_DEVICE_ID_LABTEC_WIRELESS_KEYBOARD 0x0006
......@@ -318,9 +328,6 @@
#define USB_DEVICE_ID_LD_POWERCONTROL 0x2030
#define USB_DEVICE_ID_LD_MACHINETEST 0x2040
#define USB_VENDOR_ID_KENSINGTON 0x047d
#define USB_DEVICE_ID_KS_SLIMBLADE 0x2041
#define USB_VENDOR_ID_LOGITECH 0x046d
#define USB_DEVICE_ID_LOGITECH_RECEIVER 0xc101
#define USB_DEVICE_ID_LOGITECH_HARMONY_FIRST 0xc110
......@@ -376,16 +383,16 @@
#define USB_VENDOR_ID_MONTEREY 0x0566
#define USB_DEVICE_ID_GENIUS_KB29E 0x3004
#define USB_VENDOR_ID_NCR 0x0404
#define USB_DEVICE_ID_NCR_FIRST 0x0300
#define USB_DEVICE_ID_NCR_LAST 0x03ff
#define USB_VENDOR_ID_NATIONAL_SEMICONDUCTOR 0x0400
#define USB_DEVICE_ID_N_S_HARMONY 0xc359
#define USB_VENDOR_ID_NATSU 0x08b7
#define USB_DEVICE_ID_NATSU_GAMEPAD 0x0001
#define USB_VENDOR_ID_NCR 0x0404
#define USB_DEVICE_ID_NCR_FIRST 0x0300
#define USB_DEVICE_ID_NCR_LAST 0x03ff
#define USB_VENDOR_ID_NEC 0x073e
#define USB_DEVICE_ID_NEC_USB_GAME_PAD 0x0301
......@@ -439,16 +446,16 @@
#define USB_VENDOR_ID_PRODIGE 0x05af
#define USB_DEVICE_ID_PRODIGE_CORDLESS 0x3062
#define USB_VENDOR_ID_QUANTA 0x0408
#define USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH 0x3000
#define USB_DEVICE_ID_PIXART_IMAGING_INC_OPTICAL_TOUCH_SCREEN 0x3001
#define USB_VENDOR_ID_ROCCAT 0x1e7d
#define USB_DEVICE_ID_ROCCAT_KONE 0x2ced
#define USB_VENDOR_ID_SAITEK 0x06a3
#define USB_DEVICE_ID_SAITEK_RUMBLEPAD 0xff17
#define USB_VENDOR_ID_QUANTA 0x0408
#define USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH 0x3000
#define USB_DEVICE_ID_PIXART_IMAGING_INC_OPTICAL_TOUCH_SCREEN 0x3001
#define USB_VENDOR_ID_SAMSUNG 0x0419
#define USB_DEVICE_ID_SAMSUNG_IR_REMOTE 0x0001
#define USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE 0x0600
......@@ -472,15 +479,15 @@
#define USB_VENDOR_ID_THRUSTMASTER 0x044f
#define USB_VENDOR_ID_TOUCHPACK 0x1bfd
#define USB_DEVICE_ID_TOUCHPACK_RTS 0x1688
#define USB_VENDOR_ID_TOPMAX 0x0663
#define USB_DEVICE_ID_TOPMAX_COBRAPAD 0x0103
#define USB_VENDOR_ID_TOPSEED 0x0766
#define USB_DEVICE_ID_TOPSEED_CYBERLINK 0x0204
#define USB_VENDOR_ID_TOUCHPACK 0x1bfd
#define USB_DEVICE_ID_TOUCHPACK_RTS 0x1688
#define USB_VENDOR_ID_TURBOX 0x062a
#define USB_DEVICE_ID_TURBOX_KEYBOARD 0x0201
......@@ -522,9 +529,5 @@
#define USB_VENDOR_ID_ZYDACRON 0x13EC
#define USB_DEVICE_ID_ZYDACRON_REMOTE_CONTROL 0x0006
#define USB_VENDOR_ID_KYE 0x0458
#define USB_DEVICE_ID_KYE_ERGO_525V 0x0087
#define USB_DEVICE_ID_KYE_GPEN_560 0x5003
#endif
drivers/hid/hid-input.c
View file @ fc73697b
......@@ -301,6 +301,9 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
case HID_UP_DIGITIZER:
switch (usage->hid & 0xff) {
case 0x00: /* Undefined */
goto ignore;
case 0x30: /* TipPressure */
if (!test_bit(BTN_TOUCH, input->keybit)) {
device->quirks |= HID_QUIRK_NOTOUCH;
......
drivers/hid/hid-picolcd.c
View file @ fc73697b
......@@ -127,6 +127,26 @@ static const struct fb_var_screeninfo picolcdfb_var = {
.height = 26,
.bits_per_pixel = 1,
.grayscale = 1,
.red = {
.offset = 0,
.length = 1,
.msb_right = 0,
},
.green = {
.offset = 0,
.length = 1,
.msb_right = 0,
},
.blue = {
.offset = 0,
.length = 1,
.msb_right = 0,
},
.transp = {
.offset = 0,
.length = 0,
.msb_right = 0,
},
};
#endif /* CONFIG_HID_PICOLCD_FB */
......@@ -188,6 +208,7 @@ struct picolcd_data {
/* Framebuffer stuff */
u8 fb_update_rate;
u8 fb_bpp;
u8 fb_force;
u8 *fb_vbitmap; /* local copy of what was sent to PicoLCD */
u8 *fb_bitmap; /* framebuffer */
struct fb_info *fb_info;
......@@ -346,7 +367,7 @@ static int picolcd_fb_update_tile(u8 *vbitmap, const u8 *bitmap, int bpp,
const u8 *bdata = bitmap + tile * 256 + chip * 8 + b * 32;
for (i = 0; i < 64; i++) {
tdata[i] <<= 1;
tdata[i] |= (bdata[i/8] >> (7 - i % 8)) & 0x01;
tdata[i] |= (bdata[i/8] >> (i % 8)) & 0x01;
}
}
} else if (bpp == 8) {
......@@ -399,13 +420,10 @@ static int picolcd_fb_reset(struct picolcd_data *data, int clear)
if (data->fb_bitmap) {
if (clear) {
memset(data->fb_vbitmap, 0xff, PICOLCDFB_SIZE);
memset(data->fb_vbitmap, 0, PICOLCDFB_SIZE);
memset(data->fb_bitmap, 0, PICOLCDFB_SIZE*data->fb_bpp);
} else {
/* invert 1 byte in each tile to force resend */
for (i = 0; i < PICOLCDFB_SIZE; i += 64)
data->fb_vbitmap[i] = ~data->fb_vbitmap[i];
}
data->fb_force = 1;
}
/* schedule first output of framebuffer */
......@@ -421,6 +439,9 @@ static void picolcd_fb_update(struct picolcd_data *data)
int chip, tile, n;
unsigned long flags;
if (!data)
return;
spin_lock_irqsave(&data->lock, flags);
if (!(data->status & PICOLCD_READY_FB)) {
spin_unlock_irqrestore(&data->lock, flags);
......@@ -440,14 +461,18 @@ static void picolcd_fb_update(struct picolcd_data *data)
for (chip = 0; chip < 4; chip++)
for (tile = 0; tile < 8; tile++)
if (picolcd_fb_update_tile(data->fb_vbitmap,
data->fb_bitmap, data->fb_bpp, chip, tile)) {
data->fb_bitmap, data->fb_bpp, chip, tile) ||
data->fb_force) {
n += 2;
if (!data->fb_info->par)
return; /* device lost! */
if (n >= HID_OUTPUT_FIFO_SIZE / 2) {
usbhid_wait_io(data->hdev);
n = 0;
}
picolcd_fb_send_tile(data->hdev, chip, tile);
}
data->fb_force = false;
if (n)
usbhid_wait_io(data->hdev);
}
......@@ -511,11 +536,23 @@ static int picolcd_fb_blank(int blank, struct fb_info *info)
static void picolcd_fb_destroy(struct fb_info *info)
{
struct picolcd_data *data = info->par;
u32 *ref_cnt = info->pseudo_palette;
int may_release;
info->par = NULL;
if (data)
data->fb_info = NULL;
fb_deferred_io_cleanup(info);
ref_cnt--;
mutex_lock(&info->lock);
(*ref_cnt)--;
may_release = !ref_cnt;
mutex_unlock(&info->lock);
if (may_release) {
framebuffer_release(info);
vfree((u8 *)info->fix.smem_start);
}
}
static int picolcd_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
......@@ -526,17 +563,26 @@ static int picolcd_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *i
/* only allow 1/8 bit depth (8-bit is grayscale) */
*var = picolcdfb_var;
var->activate = activate;
if (bpp >= 8)
if (bpp >= 8) {
var->bits_per_pixel = 8;
else
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
} else {
var->bits_per_pixel = 1;
var->red.length = 1;
var->green.length = 1;
var->blue.length = 1;
}
return 0;
}
static int picolcd_set_par(struct fb_info *info)
{
struct picolcd_data *data = info->par;
u8 *o_fb, *n_fb;
u8 *tmp_fb, *o_fb;
if (!data)
return -ENODEV;
if (info->var.bits_per_pixel == data->fb_bpp)
return 0;
/* switch between 1/8 bit depths */
......@@ -544,11 +590,10 @@ static int picolcd_set_par(struct fb_info *info)
return -EINVAL;
o_fb = data->fb_bitmap;
n_fb = vmalloc(PICOLCDFB_SIZE*info->var.bits_per_pixel);
if (!n_fb)
tmp_fb = kmalloc(PICOLCDFB_SIZE*info->var.bits_per_pixel, GFP_KERNEL);
if (!tmp_fb)
return -ENOMEM;
fb_deferred_io_cleanup(info);
/* translate FB content to new bits-per-pixel */
if (info->var.bits_per_pixel == 1) {
int i, b;
......@@ -558,24 +603,87 @@ static int picolcd_set_par(struct fb_info *info)
p <<= 1;
p |= o_fb[i*8+b] ? 0x01 : 0x00;
}
tmp_fb[i] = p;
}
memcpy(o_fb, tmp_fb, PICOLCDFB_SIZE);
info->fix.visual = FB_VISUAL_MONO01;
info->fix.line_length = PICOLCDFB_WIDTH / 8;
} else {
int i;
memcpy(tmp_fb, o_fb, PICOLCDFB_SIZE);
for (i = 0; i < PICOLCDFB_SIZE * 8; i++)
n_fb[i] = o_fb[i/8] & (0x01 << (7 - i % 8)) ? 0xff : 0x00;
info->fix.visual = FB_VISUAL_TRUECOLOR;
o_fb[i] = tmp_fb[i/8] & (0x01 << (7 - i % 8)) ? 0xff : 0x00;
info->fix.visual = FB_VISUAL_DIRECTCOLOR;
info->fix.line_length = PICOLCDFB_WIDTH;
}
data->fb_bitmap = n_fb;
kfree(tmp_fb);
data->fb_bpp = info->var.bits_per_pixel;
info->screen_base = (char __force __iomem *)n_fb;
info->fix.smem_start = (unsigned long)n_fb;
info->fix.smem_len = PICOLCDFB_SIZE*data->fb_bpp;
fb_deferred_io_init(info);
vfree(o_fb);
return 0;
}
/* Do refcounting on our FB and cleanup per worker if FB is
* closed after unplug of our device
* (fb_release holds info->lock and still touches info after
* we return so we can't release it immediately.
*/
struct picolcd_fb_cleanup_item {
struct fb_info *info;
struct picolcd_fb_cleanup_item *next;
};
static struct picolcd_fb_cleanup_item *fb_pending;
DEFINE_SPINLOCK(fb_pending_lock);
static void picolcd_fb_do_cleanup(struct work_struct *data)
{
struct picolcd_fb_cleanup_item *item;
unsigned long flags;
do {
spin_lock_irqsave(&fb_pending_lock, flags);
item = fb_pending;
fb_pending = item ? item->next : NULL;
spin_unlock_irqrestore(&fb_pending_lock, flags);
if (item) {
u8 *fb = (u8 *)item->info->fix.smem_start;
/* make sure we do not race against fb core when
* releasing */
mutex_lock(&item->info->lock);
mutex_unlock(&item->info->lock);
framebuffer_release(item->info);
vfree(fb);
}
} while (item);
}
DECLARE_WORK(picolcd_fb_cleanup, picolcd_fb_do_cleanup);
static int picolcd_fb_open(struct fb_info *info, int u)
{
u32 *ref_cnt = info->pseudo_palette;
ref_cnt--;
(*ref_cnt)++;
return 0;
}
static int picolcd_fb_release(struct fb_info *info, int u)
{
u32 *ref_cnt = info->pseudo_palette;
ref_cnt--;
(*ref_cnt)++;
if (!*ref_cnt) {
unsigned long flags;
struct picolcd_fb_cleanup_item *item = (struct picolcd_fb_cleanup_item *)ref_cnt;
item--;
spin_lock_irqsave(&fb_pending_lock, flags);
item->next = fb_pending;
fb_pending = item;
spin_unlock_irqrestore(&fb_pending_lock, flags);
schedule_work(&picolcd_fb_cleanup);
}
return 0;
}
......@@ -583,6 +691,8 @@ static int picolcd_set_par(struct fb_info *info)
static struct fb_ops picolcdfb_ops = {
.owner = THIS_MODULE,
.fb_destroy = picolcd_fb_destroy,
.fb_open = picolcd_fb_open,
.fb_release = picolcd_fb_release,
.fb_read = fb_sys_read,
.fb_write = picolcd_fb_write,
.fb_blank = picolcd_fb_blank,
......@@ -660,11 +770,12 @@ static int picolcd_init_framebuffer(struct picolcd_data *data)
{
struct device *dev = &data->hdev->dev;
struct fb_info *info = NULL;
int error = -ENOMEM;
int i, error = -ENOMEM;
u8 *fb_vbitmap = NULL;
u8 *fb_bitmap = NULL;
u32 *palette;
fb_bitmap = vmalloc(PICOLCDFB_SIZE*picolcdfb_var.bits_per_pixel);
fb_bitmap = vmalloc(PICOLCDFB_SIZE*8);
if (fb_bitmap == NULL) {
dev_err(dev, "can't get a free page for framebuffer\n");
goto err_nomem;
......@@ -678,18 +789,29 @@ static int picolcd_init_framebuffer(struct picolcd_data *data)
data->fb_update_rate = PICOLCDFB_UPDATE_RATE_DEFAULT;
data->fb_defio = picolcd_fb_defio;
info = framebuffer_alloc(0, dev);
/* The extra memory is:
* - struct picolcd_fb_cleanup_item
* - u32 for ref_count
* - 256*u32 for pseudo_palette
*/
info = framebuffer_alloc(257 * sizeof(u32) + sizeof(struct picolcd_fb_cleanup_item), dev);
if (info == NULL) {
dev_err(dev, "failed to allocate a framebuffer\n");
goto err_nomem;
}
palette = info->par + sizeof(struct picolcd_fb_cleanup_item);
*palette = 1;
palette++;
for (i = 0; i < 256; i++)
palette[i] = i > 0 && i < 16 ? 0xff : 0;
info->pseudo_palette = palette;
info->fbdefio = &data->fb_defio;
info->screen_base = (char __force __iomem *)fb_bitmap;
info->fbops = &picolcdfb_ops;
info->var = picolcdfb_var;
info->fix = picolcdfb_fix;
info->fix.smem_len = PICOLCDFB_SIZE;
info->fix.smem_len = PICOLCDFB_SIZE*8;
info->fix.smem_start = (unsigned long)fb_bitmap;
info->par = data;
info->flags = FBINFO_FLAG_DEFAULT;
......@@ -707,18 +829,20 @@ static int picolcd_init_framebuffer(struct picolcd_data *data)
dev_err(dev, "failed to create sysfs attributes\n");
goto err_cleanup;
}
fb_deferred_io_init(info);
data->fb_info = info;
error = register_framebuffer(info);
if (error) {
dev_err(dev, "failed to register framebuffer\n");
goto err_sysfs;
}
fb_deferred_io_init(info);
/* schedule first output of framebuffer */
data->fb_force = 1;
schedule_delayed_work(&info->deferred_work, 0);
return 0;
err_sysfs:
fb_deferred_io_cleanup(info);
device_remove_file(dev, &dev_attr_fb_update_rate);
err_cleanup:
data->fb_vbitmap = NULL;
......@@ -737,19 +861,17 @@ static void picolcd_exit_framebuffer(struct picolcd_data *data)
{
struct fb_info *info = data->fb_info;
u8 *fb_vbitmap = data->fb_vbitmap;
u8 *fb_bitmap = data->fb_bitmap;
if (!info)
return;
info->par = NULL;
device_remove_file(&data->hdev->dev, &dev_attr_fb_update_rate);
unregister_framebuffer(info);
data->fb_vbitmap = NULL;
data->fb_bitmap = NULL;
data->fb_bpp = 0;
data->fb_info = NULL;
device_remove_file(&data->hdev->dev, &dev_attr_fb_update_rate);
fb_deferred_io_cleanup(info);
unregister_framebuffer(info);
vfree(fb_bitmap);
kfree(fb_vbitmap);
}
......@@ -2566,6 +2688,13 @@ static void picolcd_remove(struct hid_device *hdev)
spin_lock_irqsave(&data->lock, flags);
data->status |= PICOLCD_FAILED;
spin_unlock_irqrestore(&data->lock, flags);
#ifdef CONFIG_HID_PICOLCD_FB
/* short-circuit FB as early as possible in order to
* avoid long delays if we host console.
*/
if (data->fb_info)
data->fb_info->par = NULL;
#endif
picolcd_exit_devfs(data);
device_remove_file(&hdev->dev, &dev_attr_operation_mode);
......@@ -2623,6 +2752,10 @@ static int __init picolcd_init(void)
static void __exit picolcd_exit(void)
{
hid_unregister_driver(&picolcd_driver);
#ifdef CONFIG_HID_PICOLCD_FB
flush_scheduled_work();
WARN_ON(fb_pending);
#endif
}
module_init(picolcd_init);
......
drivers/hid/hidraw.c
View file @ fc73697b
......@@ -46,7 +46,6 @@ static ssize_t hidraw_read(struct file *file, char __user *buffer, size_t count,
{
struct hidraw_list *list = file->private_data;
int ret = 0, len;
char *report;
DECLARE_WAITQUEUE(wait, current);
mutex_lock(&list->read_mutex);
......@@ -84,7 +83,6 @@ static ssize_t hidraw_read(struct file *file, char __user *buffer, size_t count,
if (ret)
goto out;
report = list->buffer[list->tail].value;
len = list->buffer[list->tail].len > count ?
count : list->buffer[list->tail].len;
......
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