Re: "Fix ATAPI transfer lengths" causes CD writing regression

> Just to make sure I'm not misunderstanding it.  So, PDC202xx will lock
> up if you transfer allocation size, reset and then try to drain, but
> it's okay to keep draining as part of continued PIO transfer, right?

The following hang mine:

	PIO transfer
	Reset state machine
	Read data register


	DMA transfer in progress
	Read data register

And this does not

	PIO transfer
	Keep reading data register while checking DRQ

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• References:
  • "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Daniel Drake <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Alan Cox <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Daniel Drake <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Alan Cox <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Daniel Drake <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Alan Cox <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Jens Axboe <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Jeff Garzik <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Alan Cox <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Jeff Garzik <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Alan Cox <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Daniel Drake <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Tejun Heo <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Daniel Drake <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Tejun Heo <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Daniel Drake <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Tejun Heo <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Albert Lee <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Alan Cox <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Tejun Heo <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Alan Cox <[email protected]>
  • Re: "Fix ATAPI transfer lengths" causes CD writing regression
    • From: Tejun Heo <[email protected]>

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