Date: Thu, 1 Mar 2018 05:53:55 +0000 (UTC) From: Eitan Adler <eadler@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r330176 - stable/11/sys/dev/iwm Message-ID: <201803010553.w215rtVX036807@repo.freebsd.org>
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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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