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From: Christopher Pascoe (pascoecvs.openbsd.org)
Date: Tue Mar 20 2007 - 02:09:42 CDT
Module name: src
Changes by: pascoecvs.openbsd.org 2007/03/20 01:09:42
sys/dev/ata : atascsi.c atascsi.h
sys/dev/pci : ahci.c
Request "descriptor processed" interrupts only for PIO requests (inquiry,
etc), and request that the D2H FIS at the completion of all (DMA) commands
generate an interrupt.
This makes each data transfer generate one interrupt instead of two and
should guarantee that the interrupt that is generated actually arrives
after the command has completed.