Author: eadler
Date: Thu Mar 1 05:53:55 2018
New Revision: 330176
URL: https://svnweb.freebsd.org/changeset/base/330176
Log:
MFC r313416:
[iwm] Only for family 7000 power-down busmaster DMA clocks when stopping.
Modified:
stable/11/sys/dev/iwm/if_iwm.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/dev/iwm/if_iwm.c
==============================================================================
--- stable/11/sys/dev/iwm/if_iwm.c Thu Mar 1 05:53:12 2018
(r330175)
+++ stable/11/sys/dev/iwm/if_iwm.c Thu Mar 1 05:53:55 2018
(r330176)
@@ -1401,11 +1401,12 @@ iwm_stop_device(struct iwm_softc *sc)
for (qid = 0; qid < nitems(sc->txq); qid++)
iwm_reset_tx_ring(sc, &sc->txq[qid]);
- /*
- * Power-down device's busmaster DMA clocks
- */
- iwm_write_prph(sc, IWM_APMG_CLK_DIS_REG, IWM_APMG_CLK_VAL_DMA_CLK_RQT);
- DELAY(5);
+ if (sc->cfg->device_family == IWM_DEVICE_FAMILY_7000) {
+ /* Power-down device's busmaster DMA clocks */
+ iwm_write_prph(sc, IWM_APMG_CLK_DIS_REG,
+ IWM_APMG_CLK_VAL_DMA_CLK_RQT);
+ DELAY(5);
+ }
/* Make sure (redundant) we've released our request to stay awake */
IWM_CLRBITS(sc, IWM_CSR_GP_CNTRL,
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