lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

USB: Add call to notify xHC of a device reset.

Browse Source 
Add a new host controller driver method, reset_device(), that the USB core
will use to notify the host of a successful device reset.  The call may
fail due to out-of-memory errors; attempt the port reset sequence again if
that happens.  Update hub_port_init() to allow resetting a configured
device.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sarah Sharp 2009-12-09 15:59:17 -08:00 committed by Greg Kroah-Hartman
parent 2a8f82c4ce
commit a5f0efaba4
4 changed files with 14 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/usb/core/hcd.h
View File

@ -286,6 +286,7 @@ struct hc_driver {
*/
int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
struct usb_tt *tt, gfp_t mem_flags);
int (*reset_device)(struct usb_hcd *, struct usb_device *);
};
extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);

19
drivers/usb/core/hub.c
View File

@ -2008,7 +2008,9 @@ static int hub_port_reset(struct usb_hub *hub, int port1,
struct usb_device *udev, unsigned int delay)
{
int i, status;
struct usb_hcd *hcd;
hcd = bus_to_hcd(udev->bus);
/* Block EHCI CF initialization during the port reset.
* Some companion controllers don't like it when they mix.
*/
@ -2036,6 +2038,14 @@ static int hub_port_reset(struct usb_hub *hub, int port1,
/* TRSTRCY = 10 ms; plus some extra */
msleep(10 + 40);
update_address(udev, 0);
if (hcd->driver->reset_device) {
status = hcd->driver->reset_device(hcd, udev);
if (status < 0) {
dev_err(&udev->dev, "Cannot reset "
"HCD device state\n");
break;
}
}
/* FALL THROUGH */
case -ENOTCONN:
case -ENODEV:
@ -2645,14 +2655,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
mutex_lock(&usb_address0_mutex);
if ((hcd->driver->flags & HCD_USB3) && udev->config) {
/* FIXME this will need special handling by the xHCI driver. */
dev_dbg(&udev->dev,
"xHCI reset of configured device "
"not supported yet.\n");
retval = -EINVAL;
goto fail;
} else if (!udev->config && oldspeed == USB_SPEED_SUPER) {
if (!udev->config && oldspeed == USB_SPEED_SUPER) {
/* Don't reset USB 3.0 devices during an initial setup */
usb_set_device_state(udev, USB_STATE_DEFAULT);
} else {

1
drivers/usb/host/xhci-pci.c
View File

@ -139,6 +139,7 @@ static const struct hc_driver xhci_pci_hc_driver = {
.reset_bandwidth = xhci_reset_bandwidth,
.address_device = xhci_address_device,
.update_hub_device = xhci_update_hub_device,
.reset_device = xhci_reset_device,
/*
* scheduling support

1
drivers/usb/host/xhci.h
View File

@ -1270,6 +1270,7 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep);
int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep);
void xhci_endpoint_reset(struct usb_hcd *hcd, struct usb_host_endpoint *ep);
int xhci_reset_device(struct usb_hcd *hcd, struct usb_device *udev);
int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev);
void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev);