Dear all,
I was trying to do a stress test on module insertion and removal. 1st
time modprobe g_hid and rmmod g_hid works. second time when doing
insmod g_hid crashes the core.
crash trace
----------------
root@imx6ulevk:~# modprobe ci_hdrc ci_hdrc.0: Device No Response
g_hid
Unable to handle kernel paging request at virtual address 7f09b664
pgd = 88a78000
[7f09b664] *pgd=88576811, *pte=00000000, *ppte=00000000
Internal error: Oops: 807 [#1] PREEMPT SMP ARM
Modules linked in: g_hid(+) usb_f_hid libcomposite configfs
ci_hdrc_imx usbmisc_imx ci_hdrc evbug uio_pdrv_genirq uio [last
unloaded: g_hid]
CPU: 0 PID: 679 Comm: modprobe Not tainted 4.1.15-2.1.0+g30278ab #31
Hardware name: Freescale i.MX6 Ultralite (Device Tree)
task: 88434980 ti: 88ac2000 task.ti: 88ac2000
PC is at kobject_add_internal+0x78/0x2f0
LR is at preempt_count_add+0x98/0x134
pc : [<802b5a88>] lr : [<80053f44>] psr: 60010013
sp : 88ac3d98 ip : 00000000 fp : 00000124
r10: 77b2bedc r9 : 00000001 r8 : 00000000
r7 : 80bb2ed0 r6 : 00000000 r5 : 80bb2ed0 r4 : 7f0a7660
r3 : 7f0a7664 r2 : 8801fbc0 r1 : 7f09b664 r0 : 00000000
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Control: 10c53c7d Table: 88a7806a DAC: 00000015
Process modprobe (pid: 679, stack limit = 0x88ac2210)
Stack: (0x88ac3d98 to 0x88ac4000)
3d80: 00000124 88ac3e08
3da0: 00000007 80b84240 7f0a7660 7f0a7660 80bb2ed0 00000000 00000000 802b5d48
3dc0: 88595180 88ac3ddc 7f0a7660 7f0a7658 80bb2ec8 80388154 00000000 00000000
3de0: 80b89720 7f0a7648 88595180 7f0a7658 00000000 7f0a7648 88595180 7f0a7658
3e00: 00000000 00000001 77b2bedc 8038c03c 80b89720 80b89720 88595180 7f0aa000
3e20: 00000000 7f0aa00c 80b89720 80009718 8bc6bfa0 800e856c 00000003 88a7dfc0
3e40: 8040003e 00000001 00080000 800b6200 00000003 8040003e 8bc60a60 8bc6bfa0
3e60: 80b866bc 80b84230 88001f00 80b866bc 00000124 800e9d44 7f0a7958 00000001
3e80: 7f0a7958 00000001 88595280 7f0a7958 884d4140 807f228c 7f0a7958 884d4140
3ea0: 88ac3f58 00000001 884d4148 8009690c 7f0a7964 00007fff 8009394c 00000000
3ec0: 00000000 7f0a79a0 00000000 7f0a7aa0 a0b88bf8 7f0a7964 00000000 807ffa5c
3ee0: a0b86000 00002c48 0000007a 00000000 0b300002 00000000 00000000 00000000
3f00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
3f20: 00000000 00000000 00000000 00000000 00000018 00000000 00000003 00027cc0
3f40: 0000017b 8000f604 88ac2000 00000000 01d98dd0 80096d70 a0b86000 00002c48
3f60: a0b88720 a0b885d0 a0b87c20 00000acc 00000e0c 00000000 00000000 00000000
3f80: 0000001f 00000020 00000016 0000001a 00000011 00000000 00000000 000393a8
3fa0: 00000000 8000f480 00000000 000393a8 00000003 00027cc0 00000000 01d98db0
3fc0: 00000000 000393a8 00000000 0000017b 01d98e30 00000000 000393a8 01d98dd0
3fe0: 7ed0d9f0 7ed0d9e0 0001f2a4 76e5db60 60070010 00000003 00000010 00000628
[<802b5a88>] (kobject_add_internal) from [<802b5d48>] (kobject_add+0x48/0x94)
[<802b5d48>] (kobject_add) from [<80388154>] (device_add+0xd8/0x56c)
[<80388154>] (device_add) from [<8038c03c>] (platform_device_add+0x110/0x220)
[<8038c03c>] (platform_device_add) from [<7f0aa00c>]
(hidg_init+0xc/0x7c [g_hid])
[<7f0aa00c>] (hidg_init [g_hid]) from [<80009718>] (do_one_initcall+0x8c/0x1d4)
[<80009718>] (do_one_initcall) from [<807f228c>] (do_init_module+0x5c/0x1a8)
[<807f228c>] (do_init_module) from [<8009690c>] (load_module+0x1ba8/0x1e50)
[<8009690c>] (load_module) from [<80096d70>] (SyS_finit_module+0x80/0x90)
[<80096d70>] (SyS_finit_module) from [<8000f480>] (ret_fast_syscall+0x0/0x3c)
Code: e5921004 e5823004 e5842004 e5841008 (e5813000)
---[ end trace 4155b283fc24e686 ]---
note: modprobe[679] exited with preempt_count 1
Segmentation fault
kindly help
/*
* hid.c -- HID Composite driver
*
* Based on multi.c
*
* Copyright (C) 2010 Fabien Chouteau <fabien.chouteau@xxxxxxxxx>
*
* 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/kernel.h>
#include <linux/platform_device.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/usb/composite.h>
#include <linux/usb/g_hid.h>
#include "gadget_chips.h"
#define DRIVER_DESC "HID Gadget"
#define DRIVER_VERSION "2010/03/16"
#include "u_hid.h"
/*-------------------------------------------------------------------------*/
#define HIDG_VENDOR_NUM 0x0483
#define HIDG_PRODUCT_NUM 0xA1F8
/*-------------------------------------------------------------------------*/
struct hidg_func_node {
struct list_head node;
struct usb_function_instance *fi;
struct usb_function *f;
struct hidg_func_descriptor *func;
};
static LIST_HEAD(hidg_func_list);
/*-------------------------------------------------------------------------*/
USB_GADGET_COMPOSITE_OPTIONS();
static struct usb_device_descriptor device_desc = {
.bLength = sizeof device_desc,
.bDescriptorType = 1,
.bcdUSB = cpu_to_le16(0x0200),
/* .bDeviceClass = USB_CLASS_COMM, */
/* .bDeviceSubClass = 0, */
/* .bDeviceProtocol = 0, */
.bDeviceClass = 3,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.bMaxPacketSize0 = 64,
/* Vendor and product id can be overridden by module parameters. */
.idVendor = cpu_to_le16(HIDG_VENDOR_NUM),
.idProduct = cpu_to_le16(HIDG_PRODUCT_NUM),
.bcdDevice = 0x0300,
.iManufacturer = 1,
.iProduct = 2,
.iSerialNumber = 3,
.bNumConfigurations = 1,
};
//static const struct usb_descriptor_header *otg_desc[2];
static struct usb_otg_descriptor otg_descriptor = {
.bLength = sizeof otg_descriptor,
.bDescriptorType = USB_DT_OTG,
/* REVISIT SRP-only hardware is possible, although
* it would not be called "OTG" ...
*/
.bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
};
static const struct usb_descriptor_header *otg_desc[] = {
(struct usb_descriptor_header *) &otg_descriptor,
NULL,
};
/* string IDs are assigned dynamically */
static struct usb_string strings_dev[] = {
[USB_GADGET_MANUFACTURER_IDX].s = "",
[USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
[USB_GADGET_SERIAL_IDX].s = "",
{ } /* end of list */
};
static struct usb_gadget_strings stringtab_dev = {
.language = 0x0409, /* en-us */
.strings = strings_dev,
};
static struct usb_gadget_strings *dev_strings[] = {
&stringtab_dev,
NULL,
};
/****************************** Configurations ******************************/
static int do_config(struct usb_configuration *c)
{
struct hidg_func_node *e, *n;
int status = 0;
printk(" \n do config \n");
if (gadget_is_otg(c->cdev->gadget)) {
c->descriptors = otg_desc;
c->bmAttributes |= USB_CONFIG_ATT_SELFPOWER;
printk(" \n config as otg \n");
}
list_for_each_entry(e, &hidg_func_list, node) {
e->f = usb_get_function(e->fi);
if (IS_ERR(e->f))
goto put;
status = usb_add_function(c, e->f);
if (status < 0) {
usb_put_function(e->f);
goto put;
}
}
return 0;
put:
list_for_each_entry(n, &hidg_func_list, node) {
if (n == e)
break;
usb_remove_function(c, n->f);
usb_put_function(n->f);
}
return status;
}
static struct usb_configuration config_driver = {
.label = "encore HID Gadget",
.bConfigurationValue = 1,
/* .iConfiguration = DYNAMIC */
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
};
/****************************** Gadget Bind ******************************/
static int hid_bind(struct usb_composite_dev *cdev)
{
struct usb_gadget *gadget = cdev->gadget;
struct list_head *tmp;
struct hidg_func_node *n, *m;
struct f_hid_opts *hid_opts;
int status, funcs = 0;
list_for_each(tmp, &hidg_func_list)
funcs++;
if (!funcs)
return -ENODEV;
list_for_each_entry(n, &hidg_func_list, node) {
n->fi = usb_get_function_instance("hid");
if (IS_ERR(n->fi)) {
status = PTR_ERR(n->fi);
goto put;
}
hid_opts = container_of(n->fi, struct f_hid_opts, func_inst);
hid_opts->subclass = n->func->subclass;
hid_opts->protocol = n->func->protocol;
hid_opts->report_length = n->func->report_length;
hid_opts->report_desc_length = n->func->report_desc_length;
hid_opts->report_desc = n->func->report_desc;
}
/* Allocate string descriptor numbers ... note that string
* contents can be overridden by the composite_dev glue.
*/
status = usb_string_ids_tab(cdev, strings_dev);
if (status < 0)
goto put;
device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
if (gadget_is_otg(gadget) && !otg_desc[0]) {
struct usb_descriptor_header *usb_desc;
usb_desc = usb_otg_descriptor_alloc(gadget);
if (!usb_desc)
goto put;
usb_otg_descriptor_init(gadget, usb_desc);
otg_desc[0] = usb_desc;
otg_desc[1] = NULL;
}
/* register our configuration */
status = usb_add_config(cdev, &config_driver, do_config);
if (status < 0)
goto free_otg_desc;
usb_composite_overwrite_options(cdev, &coverwrite);
dev_info(&gadget->dev, DRIVER_DESC ", version: " DRIVER_VERSION "\n");
return 0;
free_otg_desc:
kfree(otg_desc[0]);
otg_desc[0] = NULL;
put:
list_for_each_entry(m, &hidg_func_list, node) {
if (m == n)
break;
usb_put_function_instance(m->fi);
}
return status;
}
static int hid_unbind(struct usb_composite_dev *cdev)
{
#if 1
struct hidg_func_node *n;
list_for_each_entry(n, &hidg_func_list, node) {
usb_put_function(n->f);
usb_put_function_instance(n->fi);
}
kfree(otg_desc[0]);
otg_desc[0] = NULL;
printk("hid unbind \n \n");
return 0;
#endif
}
static int hidg_plat_driver_probe(struct platform_device *pdev)
{
struct hidg_func_descriptor *func = dev_get_platdata(&pdev->dev);
struct hidg_func_node *entry;
if (!func) {
dev_err(&pdev->dev, "Platform data missing\n");
return -ENODEV;
}
#if 1
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
return -ENOMEM;
entry->func = func;
list_add_tail(&entry->node, &hidg_func_list);
#endif
return 0;
}
static int hidg_plat_driver_remove(struct platform_device *pdev)
{
struct hidg_func_node *e, *n;
#if 1
list_for_each_entry_safe(e, n, &hidg_func_list, node) {
list_del(&e->node);
kfree(e);
}
#endif
printk("highg driver remove \n \n");
return 0;
}
/****************************** Some noise ******************************/
static struct usb_composite_driver hidg_driver = {
.name = "g_hid",
.dev = &device_desc,
.strings = dev_strings,
.max_speed = USB_SPEED_HIGH,
.bind = hid_bind,
.unbind = __exit_p(hid_unbind),
};
static struct platform_driver hidg_plat_driver = {
.remove = hidg_plat_driver_remove,
.driver = {
.owner = THIS_MODULE,
.name = "hidg",
},
};
/* This is a quick and dirty hack to demonstrate the gadget hid driver.
Normally the platform_device descriptor would be part of the board
support for the device, e.g. in arch/arm/mach-omap2/devices.c,
but for convenience I am putting it in to the g_hid module to make
easier for testing.
The structures my_hid_data and my_hid are straight from
Documentation/usb/gadget_hid. txt
*/
/* hid descriptor for a keyboard */
#if 1
static struct hidg_func_descriptor my_hid_data = {
.subclass = 0,
.protocol = 0,
.report_length = 8,
.report_desc_length = 115,
.report_desc = {
0x06, 0xFF, 0x00, /* USAGE_PAGE (Vendor Page: 0xFF00) */
0x09, 0x01, /* USAGE (Demo Kit) */
0xa1, 0x01, /* COLLECTION (Application) */
/* 6 */
/* REPORT_ID 1 */ //For Graphite
0x85, 0x01, /* REPORT_ID (1) */
0x09, 0x01, /* USAGE (Graphite Command) */
0x15, 0x00, /* LOGICAL_MINIMUM (0) */
0x26, 0xff, 0x00, /* LOGICAL_MAXIMUM (255) */
0x75, 0x08, /* REPORT_SIZE (8) */
0x95, 0x3f, /* REPORT_COUNT (254) */
0xB1, 0x82, /* FEATURE (Data,Var,Abs,Vol) */
0x85, 0x01, /* REPORT_ID (1) */
0x09, 0x01, /* USAGE (Command) */
0x91, 0x82, /* OUTPUT (Data,Var,Abs,Vol) */
/* 26 */
/* REPORT_ID 2 */ //From Host Command
0x85, 0x02, /* REPORT_ID 2 */
0x09, 0x02, /* USAGE (Command) */
0x15, 0x00, /* LOGICAL_MINIMUM (0) */
0x26, 0xff, 0x00, /* LOGICAL_MAXIMUM (255) */
0x75, 0x08, /* REPORT_SIZE (8) */
0x95, 0x3f, /* REPORT_COUNT (254) */
0xB1, 0x82, /* FEATURE (Data,Var,Abs,Vol) */
0x85, 0x02, /* REPORT_ID (2) */
0x09, 0x02, /* USAGE (Command) */
0x91, 0x82, /* OUTPUT (Data,Var,Abs,Vol) */
/* 46 */
//------------------------------------------------------------------
/* REPORT_ID 3 */
0x85, 0x03, /* REPORT_ID 3 */
0x09, 0x03, /* USAGE (Command) */
0x15, 0x00, /* LOGICAL_MINIMUM (0) */
0x26, 0xff, 0x00, /* LOGICAL_MAXIMUM (255) */
0x75, 0x08, /* REPORT_SIZE (8) */
0x96, 0xff,0x07, /* REPORT_COUNT (2047) */
0xB1, 0x82, /* FEATURE (Data,Var,Abs,Vol) */
0x85, 0x03, /* REPORT_ID (3) */
0x09, 0x03, /* USAGE (Command) */
0x91, 0x82, /* OUTPUT (Data,Var,Abs,Vol) */
//-----------------------------------------------------------------
/* REPORT_ID 7 */
0x85, 0x07, // REPORT_ID (7)
0x09, 0x07, // USAGE (command)
0x15, 0x00, // LOGICAL_MINIMUM (0)
0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (255)
0x75, 0x08, // REPORT_SIZE (8)
0x95, 0x3e, // REPORT_COUNT (62) /* Set report size */
0xB1, 0x82, // FEATURE (Data,Var,Abs,Vol)
0x85, 0x07, // REPORT_ID (7)
0x09, 0x07, // USAGE (Command)
0x81, 0x82, // INPUT (Data,Var,Abs,Vol)
/* REPORT_ID 8 */
0x85, 0x08, /* REPORT_ID 8 */
0x09, 0x08, /* USAGE (Commnad) */
0x15, 0x00, /* LOGICAL_MINIMUM (0) */
0x26, 0xff, 0x00, /* LOGICAL_MAXIMUM (255) */
0x75, 0x08, /* REPORT_SIZE (8) */
0x96, 0xff,0x03, /* REPORT_COUNT (1023) */
0xB1, 0x82, /* FEATURE (Data,Var,Abs,Vol) */
0x85, 0x08, /* REPORT_ID (8) */
0x09, 0x08, /* USAGE (Command) */
0x81, 0x82, /* INPUT (Data,Var,Abs,Vol) */
0xc0 /* END_COLLECTION */
}
};
#endif
#if 0
/* hid descriptor for a keyboard */
static struct hidg_func_descriptor my_hid_data = {
.subclass = 0, /* No subclass */
.protocol = 1, /* Keyboard */
.report_length = 8,
.report_desc_length = 63,
.report_desc = {
0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */
0x09, 0x06, /* USAGE (Keyboard) */
0xa1, 0x01, /* COLLECTION (Application) */
0x05, 0x07, /* USAGE_PAGE (Keyboard) */
0x19, 0xe0, /* USAGE_MINIMUM (Keyboard LeftControl) */
0x29, 0xe7, /* USAGE_MAXIMUM (Keyboard Right GUI) */
0x15, 0x00, /* LOGICAL_MINIMUM (0) */
0x25, 0x01, /* LOGICAL_MAXIMUM (1) */
0x75, 0x01, /* REPORT_SIZE (1) */
0x95, 0x08, /* REPORT_COUNT (8) */
0x81, 0x02, /* INPUT (Data,Var,Abs) */
0x95, 0x01, /* REPORT_COUNT (1) */
0x75, 0x08, /* REPORT_SIZE (8) */
0x81, 0x03, /* INPUT (Cnst,Var,Abs) */
0x95, 0x05, /* REPORT_COUNT (5) */
0x75, 0x01, /* REPORT_SIZE (1) */
0x05, 0x08, /* USAGE_PAGE (LEDs) */
0x19, 0x01, /* USAGE_MINIMUM (Num Lock) */
0x29, 0x05, /* USAGE_MAXIMUM (Kana) */
0x91, 0x02, /* OUTPUT (Data,Var,Abs) */
0x95, 0x01, /* REPORT_COUNT (1) */
0x75, 0x03, /* REPORT_SIZE (3) */
0x91, 0x03, /* OUTPUT (Cnst,Var,Abs) */
0x95, 0x06, /* REPORT_COUNT (6) */
0x75, 0x08, /* REPORT_SIZE (8) */
0x15, 0x00, /* LOGICAL_MINIMUM (0) */
0x25, 0x65, /* LOGICAL_MAXIMUM (101) */
0x05, 0x07, /* USAGE_PAGE (Keyboard) */
0x19, 0x00, /* USAGE_MINIMUM (Reserved) */
0x29, 0x65, /* USAGE_MAXIMUM (Keyboard Application) */
0x81, 0x00, /* INPUT (Data,Ary,Abs) */
0xc0 /* END_COLLECTION */
}
};
#endif
static struct platform_device my_hid = {
.name = "hidg",
.id = 0,
.num_resources = 0,
.resource = 0,
.dev.platform_data = &my_hid_data,
};
/* End hack */
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_AUTHOR("Fabien Chouteau, Peter Korsgaard");
MODULE_LICENSE("GPL");
static int __init hidg_init(void)
{
int status;
status = platform_device_register(&my_hid);
if (status < 0)
{
printk("gHID:1 \n \n");
//platform_driver_unregister(&my_hid);
return status;
}
status = platform_driver_probe(&hidg_plat_driver,hidg_plat_driver_probe);
if (status < 0)
{
printk("Driver probe unsucess \n \n ");
return status;
}
status = usb_composite_probe(&hidg_driver);
if (status < 0)
{
printk("usb composite unsucess \n \n");
platform_driver_unregister(&hidg_plat_driver);
platform_device_unregister(&my_hid);
}
return status;
}
module_init(hidg_init);
static void __exit hidg_cleanup(void)
{
printk("exit hidg \n \n");
platform_driver_unregister(&hidg_plat_driver);
usb_composite_unregister(&hidg_driver);
platform_driver_unregister(&my_hid);
hidg_plat_driver_remove(&my_hid);
}
module_exit(hidg_cleanup);
