[src/trunk]: src/sys/dev/pci - Remove an extra register read in wm_kmrn_lock_...

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

details:   https://anonhg.NetBSD.org/src/rev/d8f5f7a06cac
branches:  trunk
changeset: 995893:d8f5f7a06cac
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Wed Jan 09 08:28:22 2019 +0000

description:
- Remove an extra register read in wm_kmrn_lock_loss_workaround_ich8lan().
- Don't leave the MDICNFG register modified when the Power Management
  capability offset can't get.

diffstat:

 sys/dev/pci/if_wm.c |  14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)

diffs (49 lines):

diff -r 48a5d596bd78 -r d8f5f7a06cac sys/dev/pci/if_wm.c
--- a/sys/dev/pci/if_wm.c       Wed Jan 09 07:55:23 2019 +0000
+++ b/sys/dev/pci/if_wm.c       Wed Jan 09 08:28:22 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_wm.c,v 1.614 2019/01/07 01:43:22 msaitoh Exp $      */
+/*     $NetBSD: if_wm.c,v 1.615 2019/01/09 08:28:22 msaitoh Exp $      */
 
 /*
  * Copyright (c) 2001, 2002, 2003, 2004 Wasabi Systems, Inc.
@@ -83,7 +83,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.614 2019/01/07 01:43:22 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.615 2019/01/09 08:28:22 msaitoh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_net_mpsafe.h"
@@ -15128,7 +15128,6 @@
        if (__SHIFTOUT(status, STATUS_SPEED) != STATUS_SPEED_1000)
                return;
 
-       reg = CSR_READ(sc, WMREG_PHY_CTRL);
        for (i = 0; i < 10; i++) {
                /* read twice */
                reg = mii->mii_readreg(sc->sc_dev, 1, IGP3_KMRN_DIAG);
@@ -15837,6 +15836,11 @@
        bool wa_done = false;
        int i;
 
+       /* Get Power Management cap offset */
+       if (pci_get_capability(sc->sc_pc, sc->sc_pcitag, PCI_CAP_PWRMGMT,
+           &pmreg, NULL) == 0)
+               return;
+
        /* Save WUC and MDICNFG registers */
        wuc = CSR_READ(sc, WMREG_WUC);
        mdicnfg = CSR_READ(sc, WMREG_MDICNFG);
@@ -15848,10 +15852,6 @@
                nvmword = INVM_DEFAULT_AL;
        tmp_nvmword = nvmword | INVM_PLL_WO_VAL;
 
-       /* Get Power Management cap offset */
-       if (pci_get_capability(sc->sc_pc, sc->sc_pcitag, PCI_CAP_PWRMGMT,
-               &pmreg, NULL) == 0)
-               return;
        for (i = 0; i < WM_MAX_PLL_TRIES; i++) {
                phyval = wm_gmii_gs40g_readreg(sc->sc_dev, 1,
                    GS40G_PHY_PLL_FREQ_PAGE | GS40G_PHY_PLL_FREQ_REG);