diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2007-07-30 17:08:43 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-10-12 14:55:01 -0700 |
| commit | 4326ed0be93574dac5b5e475713015159108bd88 (patch) | |
| tree | 9d8ab9c40dc5909267f1c2c68a5e13c81be8e8e0 /drivers/usb/core/hub.c | |
| parent | 5e60a16139c2a48b9876b0ff910671eee5fb32ec (diff) | |
USB: address-0 handling during device initialization
This patch (as947) changes the device initialization and enumeration
code in hub.c; now udev->devnum will be set to 0 while the device is
being accessed at address 0. Until now this wasn't needed because the
address value was passed as part of urb->pipe; without that field the
device address must be stored elsewhere.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core/hub.c')
| -rw-r--r-- | drivers/usb/core/hub.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index c8a01f66df7..34be27a6cbb 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1481,6 +1481,7 @@ static int hub_port_reset(struct usb_hub *hub, int port1, case 0: /* TRSTRCY = 10 ms; plus some extra */ msleep(10 + 40); + udev->devnum = 0; /* Device now at address 0 */ /* FALL THROUGH */ case -ENOTCONN: case -ENODEV: @@ -2005,20 +2006,21 @@ static void ep0_reinit(struct usb_device *udev) #define usb_sndaddr0pipe() (PIPE_CONTROL << 30) #define usb_rcvaddr0pipe() ((PIPE_CONTROL << 30) | USB_DIR_IN) -static int hub_set_address(struct usb_device *udev) +static int hub_set_address(struct usb_device *udev, int devnum) { int retval; - if (udev->devnum == 0) + if (devnum <= 1) return -EINVAL; if (udev->state == USB_STATE_ADDRESS) return 0; if (udev->state != USB_STATE_DEFAULT) return -EINVAL; retval = usb_control_msg(udev, usb_sndaddr0pipe(), - USB_REQ_SET_ADDRESS, 0, udev->devnum, 0, + USB_REQ_SET_ADDRESS, 0, devnum, 0, NULL, 0, USB_CTRL_SET_TIMEOUT); if (retval == 0) { + udev->devnum = devnum; /* Device now using proper address */ usb_set_device_state(udev, USB_STATE_ADDRESS); ep0_reinit(udev); } @@ -2045,6 +2047,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1, unsigned delay = HUB_SHORT_RESET_TIME; enum usb_device_speed oldspeed = udev->speed; char *speed, *type; + int devnum = udev->devnum; /* root hub ports have a slightly longer reset period * (from USB 2.0 spec, section 7.1.7.5) @@ -2074,7 +2077,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1, goto fail; } oldspeed = udev->speed; - + /* USB 2.0 section 5.5.3 talks about ep0 maxpacket ... * it's fixed size except for full speed devices. * For Wireless USB devices, ep0 max packet is always 512 (tho @@ -2115,7 +2118,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1, dev_info (&udev->dev, "%s %s speed %sUSB device using %s and address %d\n", (udev->config) ? "reset" : "new", speed, type, - udev->bus->controller->driver->name, udev->devnum); + udev->bus->controller->driver->name, devnum); /* Set up TT records, if needed */ if (hdev->tt) { @@ -2202,7 +2205,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1, } for (j = 0; j < SET_ADDRESS_TRIES; ++j) { - retval = hub_set_address(udev); + retval = hub_set_address(udev, devnum); if (retval >= 0) break; msleep(200); @@ -2210,7 +2213,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1, if (retval < 0) { dev_err(&udev->dev, "device not accepting address %d, error %d\n", - udev->devnum, retval); + devnum, retval); goto fail; } @@ -2263,8 +2266,10 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1, retval = 0; fail: - if (retval) + if (retval) { hub_port_disable(hub, port1, 0); + udev->devnum = devnum; /* for disconnect processing */ + } mutex_unlock(&usb_address0_mutex); return retval; } |