CVS commit: src/sys/dev/ic

["Jaromir Dolecek" <jdolecek%netbsd.org@localhost>]

Module Name:    src
Committed By:   jdolecek
Date:           Thu May 21 09:24:17 UTC 2020

Modified Files:
        src/sys/dev/ic: wdc.c

Log Message:
in wdctimeout(), do not schedule another timeout handler, as that only
creates race with eventual xfer resubmission - the c_intr()
method does all the necessary handling, including re-scheduling of the
timeout handler if appropriate

also make sure to clear ATACH_IRQ_WAIT before calling c_intr(), same
as real interrupt does; this is important so that eventual spurious timeout
would not interfere with xfer handling in the atabus thread

fixes another race in the atabus thread found by KASAN, reported by Paul Ripke


To generate a diff of this commit:
cvs rdiff -u -r1.300 -r1.301 src/sys/dev/ic/wdc.c

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