Dear all:
I found something interesting.
I use usb_control_message to send 2000 vendor specific setup token to
device, the speed of each return is quite slow.
But if I just add "printk(".");" each time before I call
usb_control_message, the speed of each return will be faster.
I know there is a wait complete in usb_control_message, does that mean
the printk will fasten the reaction time of wait complete?
appreciate your help,
miloody
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