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SubjectRe: [PATCH v10 1/2] usb: xhci : Add devaddr in struct usb_device
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Sorry, something went wrong.

The result is not as expected in one of the tests.

Abandon this series of patches.

Will debug and resubmit later.


Jim


On 2019年05月16日 22:56, Alan Stern wrote:
> On Thu, 16 May 2019, Jim Lin wrote:
>
>> 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>
>> ---
> Aside from the "xhci:" part of the Subject line (it's not really
> appropriate because this is a modification of the USB core more than of
> the xhci-hcd driver),
>
> Acked-by: Alan Stern <stern@rowland.harvard.edu>
>
>
>> v2: xhci_clear_tt_buffer_complete: add static, shorter indentation
>> , remove its claiming in xhci.h
>> v3: Add description for clearing_tt (xhci.h)
>> v4: Remove clearing_tt flag because hub_tt_work has hub->tt.lock
>> to protect for Clear_TT_Buffer to be run serially.
>> Remove xhci_clear_tt_buffer_complete as it's not necessary.
>> Same reason as the above.
>> Extend usb_hub_clear_tt_buffer parameter
>> v5: Not extending usb_hub_clear_tt_buffer parameter
>> Add description.
>> v6: Remove unused parameter slot_id from xhci_clear_hub_tt_buffer
>> v7: Add devaddr field in "struct usb_device"
>> v8: split as two patches, change type from int to u8 for devaddr.
>> v9: Use pahole to find place to put devaddr in struct usb_device.
>> Remove space between type cast and variable.
>> hub.c changed from v8
>> clear->devinfo |= (u16) (udev->devaddr << 4);
>> to
>> clear->devinfo |= ((u16)udev->devaddr) << 4;
>> to solve a problem if devaddr is larger than 16.
>> v10 Initialize devaddr in xhci_setup_device()
>> Move devaddr to be below "u8 level"
>>
>> drivers/usb/core/hub.c | 4 +++-
>> drivers/usb/host/xhci.c | 1 +
>> include/linux/usb.h | 2 ++
>> 3 files changed, 6 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
>> index 15a2934dc29d..0d4b289be103 100644
>> --- a/drivers/usb/core/hub.c
>> +++ b/drivers/usb/core/hub.c
>> @@ -873,7 +873,7 @@ int usb_hub_clear_tt_buffer(struct urb *urb)
>> /* info that CLEAR_TT_BUFFER needs */
>> clear->tt = tt->multi ? udev->ttport : 1;
>> clear->devinfo = usb_pipeendpoint (pipe);
>> - clear->devinfo |= udev->devnum << 4;
>> + clear->devinfo |= ((u16)udev->devaddr) << 4;
>> clear->devinfo |= usb_pipecontrol(pipe)
>> ? (USB_ENDPOINT_XFER_CONTROL << 11)
>> : (USB_ENDPOINT_XFER_BULK << 11);
>> @@ -2125,6 +2125,8 @@ static void update_devnum(struct usb_device *udev, int devnum)
>> /* The address for a WUSB device is managed by wusbcore. */
>> if (!udev->wusb)
>> udev->devnum = devnum;
>> + if (!udev->devaddr)
>> + udev->devaddr = (u8)devnum;
>> }
>>
>> static void hub_free_dev(struct usb_device *udev)
>> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
>> index 7fa58c99f126..68b393e5a453 100644
>> --- a/drivers/usb/host/xhci.c
>> +++ b/drivers/usb/host/xhci.c
>> @@ -4096,6 +4096,7 @@ static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev,
>> /* Zero the input context control for later use */
>> ctrl_ctx->add_flags = 0;
>> ctrl_ctx->drop_flags = 0;
>> + udev->devaddr = (u8)(le32_to_cpu(slot_ctx->dev_state) & DEV_ADDR_MASK);
>>
>> xhci_dbg_trace(xhci, trace_xhci_dbg_address,
>> "Internal device address = %d",
>> diff --git a/include/linux/usb.h b/include/linux/usb.h
>> index 4229eb74bd2c..af68e31118f8 100644
>> --- a/include/linux/usb.h
>> +++ b/include/linux/usb.h
>> @@ -580,6 +580,7 @@ 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
>> @@ -663,6 +664,7 @@ struct usb_device {
>> unsigned short bus_mA;
>> u8 portnum;
>> u8 level;
>> + u8 devaddr;
>>
>> unsigned can_submit:1;
>> unsigned persist_enabled:1;
>>

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