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authorJim Lin <jilin@nvidia.com>2019-06-03 13:53:43 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-06-05 12:54:38 +0300
commit4998f1efd1904dd21697aeeead270e3eb97691dd (patch)
treec099adeec7515e42f6cbdecdbd0074328fc8da80 /include/linux/usb.h
parent32adeab3e3b5bc01ebb7746600e7c734482230d7 (diff)
downloadlinux-4998f1efd1904dd21697aeeead270e3eb97691dd.tar.xz
usb: Add devaddr in struct usb_device
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>
Diffstat (limited to 'include/linux/usb.h')
-rw-r--r--include/linux/usb.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h
index ae82d9d1112b..83d35d993e8c 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -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;