Displaying 1 result from an estimated 1 matches for "interrtupt".
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interrrupt
2006 Dec 08
1
RE: [PATCH]UHC should not generate interrupt when USBdevice returns NAK
...have data to transfer and a interrupt on complete will generate at the end of the frame in which this interrupt transfer is completed. In fact, most of these interrupts are useless and time-consuming.
UHC should let a TD active if receiving an NAK (in non-setup transaction) and will not generate an interrtupt on complete for this TD. But current UHC emulator in qemu-dm behaves like this:
1)update int_mask when a TD is fetched
2)check int_mask to decide to generate an interrupt or not after this TD is executed.If NAK is return when executing this TD, an interrupt on complete, which is unwanted, will s...