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MdeModulePkg/Usb: Adjust TPL to not block async transfer during usb enum.

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EDKII usb stack is using a TPL_CALLBACK timer to monitor async transfer
request and signal event if it's done. As usb enumeration and usb mass
storage block i/o read/write runs on TPL_CALLBACK and TPL_NOTIFY level
respectively, It blocks usb async transfer requests, usually usb mouse
/use kb, getting time to run.

Without this change, user couldn't get usb mouse/kb state in time (will
show a little lag from UI view) when there is other usb transactions, such
as a new usb device inserted.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18169 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Feng Tian
2015-08-06 07:13:16 +00:00
committed by erictian
parent ea0f431cec
commit 3cf6450eb5
4 changed files with 7 additions and 7 deletions
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2
MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c
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@ -1482,7 +1482,7 @@ UhciAllocateDev (
Status = gBS->CreateEvent (
EVT_TIMER | EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
TPL_NOTIFY,
UhciMonitorAsyncReqList,
Uhc,
&Uhc->AsyncIntMonitor