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staging: usbip: convert usbip-host driver to usb_device_driver

Browse source 
This driver was previously an interface driver. Since USB/IP
exports a whole device, not just an interface, it would make
sense to be a device driver.

This patch also modifies the way userspace sees and uses a
shared device:

* the usbip_status file is no longer created for interface 0, but for
the whole device (such as
/sys/devices/pci0000:00/0000:00:01.2/usb1/1-1/usbip_status).
* per interface information, such as interface class or protocol, is
no longer sent/received; only device specific information is
transmitted.
* since the driver was moved one level below in the USB architecture,
there is no need to bind/unbind each interface, just the device as a
whole.

Signed-off-by: Valentina Manea <valentina.manea.m@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Valentina Manea 2014-01-23 23:12:29 +02:00 committed by Greg Kroah-Hartman
parent a6646ea683
commit b7945b77cd
12 changed files with 156 additions and 294 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/staging/usbip/stub.h
View file

@ -93,7 +93,7 @@ struct bus_id_priv {
extern struct kmem_cache *stub_priv_cache;
/* stub_dev.c */
extern struct usb_driver stub_driver;
extern struct usb_device_driver stub_driver;
/* stub_main.c */
struct bus_id_priv *get_busid_priv(const char *busid);

150
drivers/staging/usbip/stub_dev.c
View file

@ -279,21 +279,19 @@ static void stub_device_unusable(struct usbip_device *ud)
*
* Allocates and initializes a new stub_device struct.
*/
static struct stub_device *stub_device_alloc(struct usb_device *udev,
struct usb_interface *interface)
static struct stub_device *stub_device_alloc(struct usb_device *udev)
{
struct stub_device *sdev;
int busnum = interface_to_busnum(interface);
int devnum = interface_to_devnum(interface);
int busnum = udev->bus->busnum;
int devnum = udev->devnum;
dev_dbg(&interface->dev, "allocating stub device");
dev_dbg(&udev->dev, "allocating stub device");
/* yes, it's a new device */
sdev = kzalloc(sizeof(struct stub_device), GFP_KERNEL);
if (!sdev)
return NULL;
sdev->interface = usb_get_intf(interface);
sdev->udev = usb_get_dev(udev);
/*
@ -322,7 +320,7 @@ static struct stub_device *stub_device_alloc(struct usb_device *udev,
usbip_start_eh(&sdev->ud);
dev_dbg(&interface->dev, "register new interface\n");
dev_dbg(&udev->dev, "register new device\n");
return sdev;
}
@ -332,32 +330,20 @@ static void stub_device_free(struct stub_device *sdev)
kfree(sdev);
}
/*
* If a usb device has multiple active interfaces, this driver is bound to all
* the active interfaces. However, usbip exports *a* usb device (i.e., not *an*
* active interface). Currently, a userland program must ensure that it
* looks at the usbip's sysfs entries of only the first active interface.
*
* TODO: use "struct usb_device_driver" to bind a usb device.
* However, it seems it is not fully supported in mainline kernel yet
* (2.6.19.2).
*/
static int stub_probe(struct usb_interface *interface,
const struct usb_device_id *id)
static int stub_probe(struct usb_device *udev)
{
struct usb_device *udev = interface_to_usbdev(interface);
struct stub_device *sdev = NULL;
const char *udev_busid = dev_name(interface->dev.parent);
int err = 0;
const char *udev_busid = dev_name(&udev->dev);
int err = 0, config;
struct bus_id_priv *busid_priv;
dev_dbg(&interface->dev, "Enter\n");
dev_dbg(&udev->dev, "Enter\n");
/* check we should claim or not by busid_table */
busid_priv = get_busid_priv(udev_busid);
if (!busid_priv || (busid_priv->status == STUB_BUSID_REMOV) ||
(busid_priv->status == STUB_BUSID_OTHER)) {
dev_info(&interface->dev,
dev_info(&udev->dev,
"%s is not in match_busid table... skip!\n",
udev_busid);
@ -383,60 +369,36 @@ static int stub_probe(struct usb_interface *interface,
return -ENODEV;
}
if (busid_priv->status == STUB_BUSID_ALLOC) {
sdev = busid_priv->sdev;
if (!sdev)
return -ENODEV;
busid_priv->interf_count++;
dev_info(&interface->dev,
"usbip-host: register new interface (bus %u dev %u ifn %u)\n",
udev->bus->busnum, udev->devnum,
interface->cur_altsetting->desc.bInterfaceNumber);
/* set private data to usb_interface */
usb_set_intfdata(interface, sdev);
err = stub_add_files(&interface->dev);
if (err) {
dev_err(&interface->dev, "stub_add_files for %s\n",
udev_busid);
usb_set_intfdata(interface, NULL);
busid_priv->interf_count--;
return err;
}
usb_get_intf(interface);
return 0;
}
/* ok, this is my device */
sdev = stub_device_alloc(udev, interface);
sdev = stub_device_alloc(udev);
if (!sdev)
return -ENOMEM;
dev_info(&interface->dev,
"usbip-host: register new device (bus %u dev %u ifn %u)\n",
udev->bus->busnum, udev->devnum,
interface->cur_altsetting->desc.bInterfaceNumber);
dev_info(&udev->dev,
"usbip-host: register new device (bus %u dev %u)\n",
udev->bus->busnum, udev->devnum);
busid_priv->interf_count = 0;
busid_priv->shutdown_busid = 0;
/* set private data to usb_interface */
usb_set_intfdata(interface, sdev);
busid_priv->interf_count++;
config = usb_choose_configuration(udev);
if (config >= 0) {
err = usb_set_configuration(udev, config);
if (err && err != -ENODEV)
dev_err(&udev->dev, "can't set config #%d, error %d\n",
config, err);
}
/* set private data to usb_device */
dev_set_drvdata(&udev->dev, sdev);
busid_priv->sdev = sdev;
err = stub_add_files(&interface->dev);
err = stub_add_files(&udev->dev);
if (err) {
dev_err(&interface->dev, "stub_add_files for %s\n", udev_busid);
usb_set_intfdata(interface, NULL);
usb_put_intf(interface);
dev_err(&udev->dev, "stub_add_files for %s\n", udev_busid);
dev_set_drvdata(&udev->dev, NULL);
usb_put_dev(udev);
kthread_stop_put(sdev->ud.eh);
busid_priv->interf_count = 0;
busid_priv->sdev = NULL;
stub_device_free(sdev);
return err;
@ -461,13 +423,13 @@ static void shutdown_busid(struct bus_id_priv *busid_priv)
* called in usb_disconnect() or usb_deregister()
* but only if actconfig(active configuration) exists
*/
static void stub_disconnect(struct usb_interface *interface)
static void stub_disconnect(struct usb_device *udev)
{
struct stub_device *sdev;
const char *udev_busid = dev_name(interface->dev.parent);
const char *udev_busid = dev_name(&udev->dev);
struct bus_id_priv *busid_priv;
dev_dbg(&interface->dev, "Enter\n");
dev_dbg(&udev->dev, "Enter\n");
busid_priv = get_busid_priv(udev_busid);
if (!busid_priv) {
@ -475,41 +437,29 @@ static void stub_disconnect(struct usb_interface *interface)
return;
}
sdev = usb_get_intfdata(interface);
sdev = dev_get_drvdata(&udev->dev);
/* get stub_device */
if (!sdev) {
dev_err(&interface->dev, "could not get device");
dev_err(&udev->dev, "could not get device");
return;
}
usb_set_intfdata(interface, NULL);
dev_set_drvdata(&udev->dev, NULL);
/*
* NOTE: rx/tx threads are invoked for each usb_device.
*/
stub_remove_files(&interface->dev);
stub_remove_files(&udev->dev);
/* If usb reset is called from event handler */
if (busid_priv->sdev->ud.eh == current) {
busid_priv->interf_count--;
if (busid_priv->sdev->ud.eh == current)
return;
}
if (busid_priv->interf_count > 1) {
busid_priv->interf_count--;
shutdown_busid(busid_priv);
usb_put_intf(interface);
return;
}
busid_priv->interf_count = 0;
/* shutdown the current connection */
shutdown_busid(busid_priv);
usb_put_dev(sdev->udev);
usb_put_intf(interface);
/* free sdev */
busid_priv->sdev = NULL;
@ -523,28 +473,34 @@ static void stub_disconnect(struct usb_interface *interface)
}
}
/*
* Presence of pre_reset and post_reset prevents the driver from being unbound
* when the device is being reset
*/
#ifdef CONFIG_PM
static int stub_pre_reset(struct usb_interface *interface)
/* These functions need usb_port_suspend and usb_port_resume,
* which reside in drivers/usb/core/usb.h. Skip for now. */
static int stub_suspend(struct usb_device *udev, pm_message_t message)
{
dev_dbg(&interface->dev, "pre_reset\n");
dev_dbg(&udev->dev, "stub_suspend\n");
return 0;
}
static int stub_post_reset(struct usb_interface *interface)
static int stub_resume(struct usb_device *udev, pm_message_t message)
{
dev_dbg(&interface->dev, "post_reset\n");
dev_dbg(&udev->dev, "stub_resume\n");
return 0;
}
struct usb_driver stub_driver = {
#endif /* CONFIG_PM */
struct usb_device_driver stub_driver = {
.name = "usbip-host",
.probe = stub_probe,
.disconnect = stub_disconnect,
.id_table = stub_table,
.pre_reset = stub_pre_reset,
.post_reset = stub_post_reset,
#ifdef CONFIG_PM
.suspend = stub_suspend,
.resume = stub_resume,
#endif
.supports_autosuspend = 0,
};

6
drivers/staging/usbip/stub_main.c
View file

@ -254,7 +254,7 @@ static int __init usbip_host_init(void)
return -ENOMEM;
}
ret = usb_register(&stub_driver);
ret = usb_register_device_driver(&stub_driver, THIS_MODULE);
if (ret) {
pr_err("usb_register failed %d\n", ret);
goto err_usb_register;
@ -271,7 +271,7 @@ static int __init usbip_host_init(void)
return ret;
err_create_file:
usb_deregister(&stub_driver);
usb_deregister_device_driver(&stub_driver);
err_usb_register:
kmem_cache_destroy(stub_priv_cache);
return ret;
@ -286,7 +286,7 @@ static void __exit usbip_host_exit(void)
* deregister() calls stub_disconnect() for all devices. Device
* specific data is cleared in stub_disconnect().
*/
usb_deregister(&stub_driver);
usb_deregister_device_driver(&stub_driver);
kmem_cache_destroy(stub_priv_cache);
}

2
drivers/staging/usbip/stub_rx.c
View file

@ -550,7 +550,7 @@ static void stub_rx_pdu(struct usbip_device *ud)
int ret;
struct usbip_header pdu;
struct stub_device *sdev = container_of(ud, struct stub_device, ud);
struct device *dev = &sdev->interface->dev;
struct device *dev = &sdev->udev->dev;
usbip_dbg_stub_rx("Enter\n");

45
drivers/staging/usbip/userspace/libsrc/usbip_host_driver.c
View file

@ -32,7 +32,6 @@ struct usbip_host_driver *host_driver;
#define SYSFS_OPEN_RETRIES 100
/* only the first interface value is true! */
static int32_t read_attr_usbip_status(struct usbip_usb_device *udev)
{
char attrpath[SYSFS_PATH_MAX];
@ -56,8 +55,8 @@ static int32_t read_attr_usbip_status(struct usbip_usb_device *udev)
* usbip_status to reappear.
*/
snprintf(attrpath, SYSFS_PATH_MAX, "%s/%s:%d.%d/usbip_status",
udev->path, udev->busid, udev->bConfigurationValue, 0);
snprintf(attrpath, SYSFS_PATH_MAX, "%s/usbip_status",
udev->path);
while (retries > 0) {
if (stat(attrpath, &s) == 0)
@ -168,19 +167,18 @@ static void delete_nothing(void *unused_data)
static int refresh_exported_devices(void)
{
/* sysfs_device of usb_interface */
struct sysfs_device *suintf;
struct dlist *suintf_list;
/* sysfs_device of usb_device */
struct sysfs_device *sudev;
struct dlist *sudev_list;
struct dlist *sudev_unique_list;
struct usbip_exported_device *edev;
sudev_list = dlist_new_with_delete(sizeof(struct sysfs_device),
delete_nothing);
sudev_unique_list = dlist_new_with_delete(sizeof(struct sysfs_device),
delete_nothing);
suintf_list = sysfs_get_driver_devices(host_driver->sysfs_driver);
if (!suintf_list) {
sudev_list = sysfs_get_driver_devices(host_driver->sysfs_driver);
if (!sudev_list) {
/*
* Not an error condition. There are simply no devices bound to
* the driver yet.
@ -190,23 +188,13 @@ static int refresh_exported_devices(void)
return 0;
}
/* collect unique USB devices (not interfaces) */
dlist_for_each_data(suintf_list, suintf, struct sysfs_device) {
/* get usb device of this usb interface */
sudev = sysfs_get_device_parent(suintf);
if (!sudev) {
dbg("sysfs_get_device_parent failed: %s", suintf->name);
continue;
}
dlist_for_each_data(sudev_list, sudev, struct sysfs_device)
if (check_new(sudev_unique_list, sudev))
dlist_unshift(sudev_unique_list, sudev);
if (check_new(sudev_list, sudev)) {
/* insert item at head of list */
dlist_unshift(sudev_list, sudev);
}
}
dlist_for_each_data(sudev_list, sudev, struct sysfs_device) {
dlist_for_each_data(sudev_unique_list, sudev, struct sysfs_device) {
edev = usbip_exported_device_new(sudev->path);
if (!edev) {
dbg("usbip_exported_device_new failed");
continue;
@ -216,7 +204,7 @@ static int refresh_exported_devices(void)
host_driver->ndevs++;
}
dlist_destroy(sudev_list);
dlist_destroy(sudev_unique_list);
return 0;
}
@ -356,9 +344,8 @@ int usbip_host_export_device(struct usbip_exported_device *edev, int sockfd)
}
/* only the first interface is true */
snprintf(attr_path, sizeof(attr_path), "%s/%s:%d.%d/%s",
edev->udev.path, edev->udev.busid,
edev->udev.bConfigurationValue, 0, attr_name);
snprintf(attr_path, sizeof(attr_path), "%s/%s",
edev->udev.path, attr_name);
attr = sysfs_open_attribute(attr_path);
if (!attr) {

154
drivers/staging/usbip/userspace/src/usbip_bind.c
View file

@ -52,12 +52,8 @@ static int bind_usbip(char *busid)
char attr_name[] = "bind";
char sysfs_mntpath[SYSFS_PATH_MAX];
char bind_attr_path[SYSFS_PATH_MAX];
char intf_busid[SYSFS_BUS_ID_SIZE];
struct sysfs_device *busid_dev;
struct sysfs_attribute *bind_attr;
struct sysfs_attribute *bConfValue;
struct sysfs_attribute *bNumIntfs;
int i, failed = 0;
int failed = 0;
int rc, ret = -1;
rc = sysfs_get_mnt_path(sysfs_mntpath, SYSFS_PATH_MAX);
@ -76,39 +72,15 @@ static int bind_usbip(char *busid)
return -1;
}
busid_dev = sysfs_open_device(bus_type, busid);
if (!busid_dev) {
dbg("sysfs_open_device %s failed: %s", busid, strerror(errno));
goto err_close_bind_attr;
}
bConfValue = sysfs_get_device_attr(busid_dev, "bConfigurationValue");
bNumIntfs = sysfs_get_device_attr(busid_dev, "bNumInterfaces");
if (!bConfValue || !bNumIntfs) {
dbg("problem getting device attributes: %s",
strerror(errno));
goto err_close_busid_dev;
}
for (i = 0; i < atoi(bNumIntfs->value); i++) {
snprintf(intf_busid, SYSFS_BUS_ID_SIZE, "%s:%.1s.%d", busid,
bConfValue->value, i);
rc = sysfs_write_attribute(bind_attr, intf_busid,
SYSFS_BUS_ID_SIZE);
if (rc < 0) {
dbg("bind driver at %s failed", intf_busid);
failed = 1;
}
rc = sysfs_write_attribute(bind_attr, busid, SYSFS_BUS_ID_SIZE);
if (rc < 0) {
dbg("bind driver at %s failed", busid);
failed = 1;
}
if (!failed)
ret = 0;
err_close_busid_dev:
sysfs_close_device(busid_dev);
err_close_bind_attr:
sysfs_close_attribute(bind_attr);
return ret;
@ -118,15 +90,12 @@ err_close_bind_attr:
static int unbind_other(char *busid)
{
char bus_type[] = "usb";
char intf_busid[SYSFS_BUS_ID_SIZE];
struct sysfs_device *busid_dev;
struct sysfs_device *intf_dev;
struct sysfs_driver *intf_drv;
struct sysfs_device *dev;
struct sysfs_driver *drv;
struct sysfs_attribute *unbind_attr;
struct sysfs_attribute *bConfValue;
struct sysfs_attribute *bDevClass;
struct sysfs_attribute *bNumIntfs;
int i, rc;
int rc;
enum unbind_status status = UNBIND_ST_OK;
busid_dev = sysfs_open_device(bus_type, busid);
@ -134,12 +103,11 @@ static int unbind_other(char *busid)
dbg("sysfs_open_device %s failed: %s", busid, strerror(errno));
return -1;
}
dbg("busid path: %s", busid_dev->path);
bConfValue = sysfs_get_device_attr(busid_dev, "bConfigurationValue");
bDevClass = sysfs_get_device_attr(busid_dev, "bDeviceClass");
bNumIntfs = sysfs_get_device_attr(busid_dev, "bNumInterfaces");
if (!bConfValue || !bDevClass || !bNumIntfs) {
dbg("problem getting device attributes: %s",
if (!bDevClass) {
dbg("problem getting device attribute: %s",
strerror(errno));
goto err_close_busid_dev;
}
@ -149,62 +117,62 @@ static int unbind_other(char *busid)
goto err_close_busid_dev;
}
for (i = 0; i < atoi(bNumIntfs->value); i++) {
snprintf(intf_busid, SYSFS_BUS_ID_SIZE, "%s:%.1s.%d", busid,
bConfValue->value, i);
intf_dev = sysfs_open_device(bus_type, intf_busid);
if (!intf_dev) {
dbg("could not open interface device: %s",
strerror(errno));
goto err_close_busid_dev;
}
dbg("%s -> %s", intf_dev->name, intf_dev->driver_name);
if (!strncmp("unknown", intf_dev->driver_name, SYSFS_NAME_LEN))
/* unbound interface */
continue;
if (!strncmp(USBIP_HOST_DRV_NAME, intf_dev->driver_name,
SYSFS_NAME_LEN)) {
/* already bound to usbip-host */
status = UNBIND_ST_USBIP_HOST;
continue;
}
/* unbinding */
intf_drv = sysfs_open_driver(bus_type, intf_dev->driver_name);
if (!intf_drv) {
dbg("could not open interface driver on %s: %s",
intf_dev->name, strerror(errno));
goto err_close_intf_dev;
}
unbind_attr = sysfs_get_driver_attr(intf_drv, "unbind");
if (!unbind_attr) {
dbg("problem getting interface driver attribute: %s",
strerror(errno));
goto err_close_intf_drv;
}
rc = sysfs_write_attribute(unbind_attr, intf_dev->bus_id,
SYSFS_BUS_ID_SIZE);
if (rc < 0) {
/* NOTE: why keep unbinding other interfaces? */
dbg("unbind driver at %s failed", intf_dev->bus_id);
status = UNBIND_ST_FAILED;
}
sysfs_close_driver(intf_drv);
sysfs_close_device(intf_dev);
dev = sysfs_open_device(bus_type, busid);
if (!dev) {
dbg("could not open device: %s",
strerror(errno));
goto err_close_busid_dev;
}
dbg("%s -> %s", dev->name, dev->driver_name);
if (!strncmp("unknown", dev->driver_name, SYSFS_NAME_LEN)) {
/* unbound interface */
sysfs_close_device(dev);
goto out;
}
if (!strncmp(USBIP_HOST_DRV_NAME, dev->driver_name,
SYSFS_NAME_LEN)) {
/* already bound to usbip-host */
status = UNBIND_ST_USBIP_HOST;
sysfs_close_device(dev);
goto out;
}
/* unbinding */
drv = sysfs_open_driver(bus_type, dev->driver_name);
if (!drv) {
dbg("could not open device driver on %s: %s",
dev->name, strerror(errno));
goto err_close_intf_dev;
}
dbg("device driver: %s", drv->path);
unbind_attr = sysfs_get_driver_attr(drv, "unbind");
if (!unbind_attr) {
dbg("problem getting device driver attribute: %s",
strerror(errno));
goto err_close_intf_drv;
}
rc = sysfs_write_attribute(unbind_attr, dev->bus_id,
SYSFS_BUS_ID_SIZE);
if (rc < 0) {
/* NOTE: why keep unbinding other interfaces? */
dbg("unbind driver at %s failed", dev->bus_id);
status = UNBIND_ST_FAILED;
}
sysfs_close_driver(drv);
sysfs_close_device(dev);
goto out;
err_close_intf_drv:
sysfs_close_driver(intf_drv);
sysfs_close_driver(drv);
err_close_intf_dev:
sysfs_close_device(intf_dev);
sysfs_close_device(dev);
err_close_busid_dev:
status = UNBIND_ST_FAILED;
out:

19
drivers/staging/usbip/userspace/src/usbip_list.c
View file

@ -52,9 +52,8 @@ static int get_exported_devices(char *host, int sockfd)
struct op_devlist_reply reply;
uint16_t code = OP_REP_DEVLIST;
struct usbip_usb_device udev;
struct usbip_usb_interface uintf;
unsigned int i;
int j, rc;
int rc;
rc = usbip_net_send_op_common(sockfd, OP_REQ_DEVLIST, 0);
if (rc < 0) {
@ -104,22 +103,6 @@ static int get_exported_devices(char *host, int sockfd)
printf("%11s: %s\n", "", udev.path);
printf("%11s: %s\n", "", class_name);
for (j = 0; j < udev.bNumInterfaces; j++) {
rc = usbip_net_recv(sockfd, &uintf, sizeof(uintf));
if (rc < 0) {
dbg("usbip_net_recv failed: usbip_usb_intf[%d]",
j);
return -1;
}
usbip_net_pack_usb_interface(0, &uintf);
usbip_names_get_class(class_name, sizeof(class_name),
uintf.bInterfaceClass,
uintf.bInterfaceSubClass,
uintf.bInterfaceProtocol);
printf("%11s: %2d - %s\n", "", j, class_name);
}
printf("\n");
}

51
drivers/staging/usbip/userspace/src/usbip_unbind.c
View file

@ -47,12 +47,10 @@ static int unbind_device(char *busid)
int verified = 0;
int rc, ret = -1;
char attr_name[] = "bConfigurationValue";
char attr_name[] = "unbind";
char sysfs_mntpath[SYSFS_PATH_MAX];
char busid_attr_path[SYSFS_PATH_MAX];
struct sysfs_attribute *busid_attr;
char *val = NULL;
int len;
char unbind_attr_path[SYSFS_PATH_MAX];
struct sysfs_attribute *unbind_attr;
/* verify the busid device is using usbip-host */
usbip_host_drv = sysfs_open_driver(bus_type, USBIP_HOST_DRV_NAME);
@ -99,55 +97,34 @@ static int unbind_device(char *busid)
return -1;
}
snprintf(busid_attr_path, sizeof(busid_attr_path), "%s/%s/%s/%s/%s/%s",
sysfs_mntpath, SYSFS_BUS_NAME, bus_type, SYSFS_DEVICES_NAME,
busid, attr_name);
snprintf(unbind_attr_path, sizeof(unbind_attr_path), "%s/%s/%s/%s/%s/%s",
sysfs_mntpath, SYSFS_BUS_NAME, bus_type, SYSFS_DRIVERS_NAME,
USBIP_HOST_DRV_NAME, attr_name);
/* read a device attribute */
busid_attr = sysfs_open_attribute(busid_attr_path);
if (!busid_attr) {
unbind_attr = sysfs_open_attribute(unbind_attr_path);
if (!unbind_attr) {
err("could not open %s/%s: %s", busid, attr_name,
strerror(errno));
return -1;
}
if (sysfs_read_attribute(busid_attr) < 0) {
err("problem reading attribute: %s", strerror(errno));
goto err_out;
}
len = busid_attr->len;
val = malloc(len);
*val = *busid_attr->value;
sysfs_close_attribute(busid_attr);
/* notify driver of unbind */
rc = modify_match_busid(busid, 0);
if (rc < 0) {
err("unable to unbind device on %s", busid);
goto err_out;
}
/* write the device attribute */
busid_attr = sysfs_open_attribute(busid_attr_path);
if (!busid_attr) {
err("could not open %s/%s: %s", busid, attr_name,
strerror(errno));
return -1;
}
rc = sysfs_write_attribute(busid_attr, val, len);
if (rc < 0) {
err("problem writing attribute: %s", strerror(errno));
goto err_out;
}
sysfs_close_attribute(busid_attr);
rc = sysfs_write_attribute(unbind_attr, busid,
SYSFS_BUS_ID_SIZE);
if (rc < 0) {
dbg("bind driver at %s failed", busid);
}
sysfs_close_attribute(unbind_attr);
ret = 0;
printf("unbind device on busid %s: complete\n", busid);
err_out:
free(val);
err_close_usbip_host_drv:
sysfs_close_driver(usbip_host_drv);

15
drivers/staging/usbip/userspace/src/usbipd.c
View file

@ -159,9 +159,7 @@ static int send_reply_devlist(int connfd)
{
struct usbip_exported_device *edev;
struct usbip_usb_device pdu_udev;
struct usbip_usb_interface pdu_uinf;
struct op_devlist_reply reply;
int i;
int rc;
reply.ndev = 0;
@ -196,19 +194,6 @@ static int send_reply_devlist(int connfd)
dbg("usbip_net_send failed: pdu_udev");
return -1;
}
for (i = 0; i < edev->udev.bNumInterfaces; i++) {
dump_usb_interface(&edev->uinf[i]);
memcpy(&pdu_uinf, &edev->uinf[i], sizeof(pdu_uinf));
usbip_net_pack_usb_interface(1, &pdu_uinf);
rc = usbip_net_send(connfd, &pdu_uinf,
sizeof(pdu_uinf));
if (rc < 0) {
dbg("usbip_net_send failed: pdu_uinf");
return -1;
}
}
}
return 0;

1
drivers/usb/core/generic.c
View file

@ -155,6 +155,7 @@ int usb_choose_configuration(struct usb_device *udev)
}
return i;
}
EXPORT_SYMBOL_GPL(usb_choose_configuration);
static int generic_probe(struct usb_device *udev)
{

1
drivers/usb/core/message.c
View file

@ -1920,6 +1920,7 @@ free_interfaces:
usb_autosuspend_device(dev);
return 0;
}
EXPORT_SYMBOL_GPL(usb_set_configuration);
static LIST_HEAD(set_config_list);
static DEFINE_SPINLOCK(set_config_lock);

4
include/linux/usb.h
View file

@ -1668,6 +1668,10 @@ extern void usb_reset_endpoint(struct usb_device *dev, unsigned int epaddr);
/* this request isn't really synchronous, but it belongs with the others */
extern int usb_driver_set_configuration(struct usb_device *udev, int config);
/* choose and set configuration for device */
extern int usb_choose_configuration(struct usb_device *udev);
extern int usb_set_configuration(struct usb_device *dev, int configuration);
/*
* timeouts, in milliseconds, used for sending/receiving control messages
* they typically complete within a few frames (msec) after they're issued