CVS commit: src/sys/dev/eisa

["Jason R Thorpe" <thorpej%netbsd.org@localhost>]

Module Name:    src
Committed By:   thorpej
Date:           Sat Jul 24 15:52:16 UTC 2021

Modified Files:
        src/sys/dev/eisa: ahb.c

Log Message:
Don't blindly establish our interrupt handler as IST_LEVEL.  If the INTDEF
register has the INTHIGH bit set, the controller is going to keep the
line low when *not* asserting an interrupt, and since EISA level-tiggered
interrupts are active-low, this would result in a forever-interrupt-storm.

So, if INTHIGH is set in INTDEF, establish our interrupt handler as
IST_EDGE, which will program the EISA PIC to detect the interrupt on
the rising edge of the IRQ line.


To generate a diff of this commit:
cvs rdiff -u -r1.66 -r1.67 src/sys/dev/eisa/ahb.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.