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| author | Feng Tian <feng.tian@intel.com> | 2016-11-23 09:46:32 +0800 |
|---|---|---|
| committer | Feng Tian <feng.tian@intel.com> | 2016-11-24 12:44:50 +0800 |
| commit | 26b85012802ed8a2ff3db96d102121323aabcc0c (patch) | |
| tree | 311cb016369a40fdad613964bac0df2088925764 /BaseTools/Source/Python/Eot/EotToolError.py | |
| parent | 7fa1376c5c97d18eac719f35e5e85356d3c1b033 (diff) | |
| download | edk2-platforms-26b85012802ed8a2ff3db96d102121323aabcc0c.tar.xz | |
MdeModulePkg/Xhci: Add 10ms delay before sending SendAddr cmd to dev
We send ADDRESS DEVICE CMD in XhcInitializeDeviceSlot(), which will
cause XHC issue a USB SET_ADDRESS request to the USB Device.
According to USB spec, there should have a 10ms delay before this
operation after resetting a given port.
But in original code, there is a possible path which may have no such
10ms delay:
UsbHubResetPort()->UsbHubSetPortFeature()->Stall(20)->UsbHubGetPortSt
atus()->XhcPollPortStatusChange()->(if RESET_C bit is set)->
XhcInitializeDeviceSlot()->(if RESET_C bit is set)->Stall(10)
So this patch is used to fix above issue.
Cc: Star Zeng <star.zeng@intel.com>
Cc: Baraneedharan Anbazhagan <anbazhagan@hp.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Feng Tian <feng.tian@intel.com>
Tested-by: Baraneedharan Anbazhagan <anbazhagan@hp.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Diffstat (limited to 'BaseTools/Source/Python/Eot/EotToolError.py')
0 files changed, 0 insertions, 0 deletions