powerpc64 head -r314687 (PowerMac G5 so-called "Quad Core", clang based): CAM status: Command timeout (always?)

[Mark Millard]

When I tried to jump from head -r314479 to -r314687 the -r314687 kernel
the result failed by always(?) getting:

CAM status: Command timeout

for:

ATAPI_IDENTIFY
INQUIRY
DSM TRIM
READ_DMA48
SETFEATURES ENABLE RCACHE
WRITE_DMA48
etc.

at:

ada0:ata2:0:0:0
aprobe0:ata0:0:0:0

Booting with the older -r314479 works fine (same -r314687 world).

[FYI: It is a ufs context.]


The only thing that looks likely to me for
the change in behavior is. . .

Author: markj
Date: Fri Mar  3 20:51:57 2017
New Revision: 314624
URL: 
https://svnweb.freebsd.org/changeset/base/314624


Log:
  Reject userland CCBs that have CAM_UNLOCKED set.
  
  CAM_UNLOCKED is internal flag and cannot correctly be set by userland.
  Return EINVAL from CAMIOCOMMAND and CAMIOQUEUE if it is set.
  
  Also fix leaks in some of the error paths for CAMIOQUEUE.
  
  PR:		215356
  Reviewed by:	ken, mav
  MFC after:	1 week
  Differential Revision:	
https://reviews.freebsd.org/D9869


Modified:
  head/sys/cam/cam_xpt.c
  head/sys/cam/scsi/scsi_pass.c



[This may just mean that it exposes other problems.]


===
Mark Millard
markmi at dsl-only.net