CVS commit: src/sys/dev/pci

["SAITOH Masanobu" <msaitoh%netbsd.org@localhost>]

Module Name:    src
Committed By:   msaitoh
Date:           Fri Nov  2 08:04:42 UTC 2018

Modified Files:
        src/sys/dev/pci: if_wm.c

Log Message:
 Fix a PCH2 specific bug that wrong register value can be read when boot.
When a wrong value is read when boot, the read device ID was incorrect and
ukphy(3) is attached instead of ihphy(4). The bug might also result in
MDIC read/write error.

 How to reproduce:

  0) Boot Windows.
  1) Leave some minutes.
  2) Reboot to NetBSD.

 To fix this problem, adding extra 100us delay at the end of
wm_gmii_mdic_{read,write}reg() on PCH2. Same as FreeBSD and linux.

 Reported by David Brownlee a few days ago and also reported by jmcneill
a half year ago. Tested with my own Thinkpad X220.

XXX pullup-[78]


To generate a diff of this commit:
cvs rdiff -u -r1.591 -r1.592 src/sys/dev/pci/if_wm.c

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