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usb: Add devaddr in struct usb_device

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The Clear_TT_Buffer request sent to the hub includes the address of
the LS/FS child device in wValue field. usb_hub_clear_tt_buffer()
uses udev->devnum to set the address wValue. This won't work for
devices connected to xHC.

For other host controllers udev->devnum is the same as the address of
the usb device, chosen and set by usb core. With xHC the controller
hardware assigns the address, and won't be the same as devnum.

Here we add devaddr in "struct usb_device" for
usb_hub_clear_tt_buffer() to use.

Signed-off-by: Jim Lin <jilin@nvidia.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jim Lin
2019-06-03 18:53:43 +08:00
committed by Greg Kroah-Hartman
parent 32adeab3e3
commit 4998f1efd1
3 changed files with 7 additions and 1 deletions
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2
include/linux/usb.h
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@@ -578,6 +578,7 @@ struct usb3_lpm_parameters {
* @bus_mA: Current available from the bus
* @portnum: parent port number (origin 1)
* @level: number of USB hub ancestors
* @devaddr: device address, XHCI: assigned by HW, others: same as devnum
* @can_submit: URBs may be submitted
* @persist_enabled: USB_PERSIST enabled for this device
* @have_langid: whether string_langid is valid
@@ -661,6 +662,7 @@ struct usb_device {
unsigned short bus_mA;
u8 portnum;
u8 level;
u8 devaddr;
unsigned can_submit:1;
unsigned persist_enabled:1;