On Sun, 5 May 2013 18:31:20 +0200 Rafał Miłecki <zaj...@gmail.com> wrote:
> Still worth considering is my previous e-mail. Why writing (for > example) 1 to RXSTOPINDEX doesn't stop firmware from using slot 1? What makes you think this register does not work? Do you write a 1 to the register, or do you mean "the offset that corresponds to slot 1"? > Can it be because it's "too late"? For example: > 1) Firmware writes to slot 0, changes "curr descr" to 1 > 2) Firmware grabs slot 1 > 3) Firmware generates IRQ > 4) Driver reads slot 0 > 5) Driver writes RX stop index 1 The stop index is the index that the firmware does _not_ write to. If you set it _after_ it already wrote, you clearly are too late (for this ring wrapping). -- Michael
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