Hi,my dear friends.
I modify wdk’s usbsamp ,and the application program buffer equal to the driver’s MaximumTransferSize.my application program’s use ReadFile asynchronous read operation,but return 0,and getlasterror=ERROR_IO_PENDING,but i use GetOverlappedResult function can get the right return size.
why my driver return STATUS_PENDING? thank you.
KMDF marks all IO as pending
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From: xxxxx@lists.osr.com [xxxxx@lists.osr.com] on behalf of zhonghong200@163.com [zhonghong200@163.com]
Sent: Friday, August 27, 2010 8:46 PM
To: Windows System Software Devs Interest List
Subject: [ntdev] ReadFile asynchronous read operation,but return 0,and getlasterror=ERROR_IO_PENDING
Hi,my dear friends.
I modify wdk’s usbsamp ,and the application program buffer equal to the driver’s MaximumTransferSize.my application program’s use ReadFile asynchronous read operation,but return 0,and getlasterror=ERROR_IO_PENDING,but i use GetOverlappedResult function can get the right return size.
why my driver return STATUS_PENDING? thank you.
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