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staging: usbip: let client choose device configuration 

Since usbip-host is now a device driver and the client
has full access to the shared device, it makes sense to
let the client choose device configuration.

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 2014-03-08 14:53:32 +02:00 committed by Greg Kroah-Hartman
parent 435d948c2b
commit 2c8c981589
2 changed files with 8 additions and 28 deletions
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10
drivers/staging/usbip/stub_dev.c
View File

@ -337,7 +337,7 @@ static int stub_probe(struct usb_device *udev)
{
struct stub_device *sdev = NULL;
const char *udev_busid = dev_name(&udev->dev);
int err = 0, config;
int err = 0;
struct bus_id_priv *busid_priv;
dev_dbg(&udev->dev, "Enter\n");
@ -383,14 +383,6 @@ static int stub_probe(struct usb_device *udev)
busid_priv->shutdown_busid = 0;
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;

26
drivers/staging/usbip/stub_rx.c
View File

@ -142,31 +142,19 @@ static int tweak_set_interface_cmd(struct urb *urb)
static int tweak_set_configuration_cmd(struct urb *urb)
{
struct stub_priv *priv = (struct stub_priv *) urb->context;
struct stub_device *sdev = priv->sdev;
struct usb_ctrlrequest *req;
__u16 config;
int err;
req = (struct usb_ctrlrequest *) urb->setup_packet;
config = le16_to_cpu(req->wValue);
/*
* I have never seen a multi-config device. Very rare.
* For most devices, this will be called to choose a default
* configuration only once in an initialization phase.
*
* set_configuration may change a device configuration and its device
* drivers will be unbound and assigned for a new device configuration.
* This means this usbip driver will be also unbound when called, then
* eventually reassigned to the device as far as driver matching
* condition is kept.
*
* Unfortunately, an existing usbip connection will be dropped
* due to this driver unbinding. So, skip here.
* A user may need to set a special configuration value before
* exporting the device.
*/
dev_info(&urb->dev->dev, "usb_set_configuration %d to %s... skip!\n",
config, dev_name(&urb->dev->dev));
err = usb_set_configuration(sdev->udev, config);
if (err && err != -ENODEV)
dev_err(&sdev->udev->dev, "can't set config #%d, error %d\n",
config, err);
return 0;
}