[src/jdolecek-ncq]: src/sys/dev/ata some more notes for dump on unopened devi...

[jdolecek <jdolecek%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/1d291b1847fa
branches:  jdolecek-ncq
changeset: 822933:1d291b1847fa
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Tue Jun 20 21:55:09 2017 +0000

description:
some more notes for dump on unopened device (PR kern/16789)

diffstat:

 sys/dev/ata/TODO.ncq |  3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diffs (13 lines):

diff -r 0db8b5ac6961 -r 1d291b1847fa sys/dev/ata/TODO.ncq
--- a/sys/dev/ata/TODO.ncq      Tue Jun 20 21:00:47 2017 +0000
+++ b/sys/dev/ata/TODO.ncq      Tue Jun 20 21:55:09 2017 +0000
@@ -35,6 +35,9 @@
 while waiting for the command to finish; specifically, if WDF_LOADED is not
 set 
 - happens due to wd_get_params() with just AT_WAIT in wdopen()
+- not easy to fix, open needs to read disklabel and all this mechanics
+  is too much for emergency crash dump code path
+- old bug - kern/16789
 
 add nibble to control number of tags (1==disable NCQ)?