Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754590AbaFPIPk (ORCPT ); Mon, 16 Jun 2014 04:15:40 -0400 Received: from mail-gw2-out.broadcom.com ([216.31.210.63]:45791 "EHLO mail-gw2-out.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754272AbaFPIPh (ORCPT ); Mon, 16 Jun 2014 04:15:37 -0400 X-IronPort-AV: E=Sophos;i="5.01,485,1400050800"; d="scan'208";a="34644085" Message-ID: <539EA79C.7010206@broadcom.com> Date: Mon, 16 Jun 2014 10:15:24 +0200 From: Arend van Spriel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: "Fu, Zhonghui" , , Franky Lin , , , , , , , CC: , , , , , Russell King Subject: Re: [PATCH] brcmfmac: prevent watchdog from interfering with scanning and connecting References: <539E8559.3010601@linux.intel.com> In-Reply-To: <539E8559.3010601@linux.intel.com> Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 16-06-14 07:49, Fu, Zhonghui wrote: > From 14485894add32aedacb3e486ebb2cc2b73861abf Mon Sep 17 00:00:00 2001 > From: Fu zhonghui > Date: Wed, 11 Jun 2014 11:06:55 +0800 > Subject: [PATCH] brcmfmac: prevent watchdog from interfering with scanning and connecting > > Watchdog in brcmfmac driver may make WiFi chip enter sleep mode > before completion of scanning or connecting. > > This will lead to scanning or connecting failure. > > Increasing temporarily idle-time threshold during scanning or > connecting can ensure scanning or connecting success without > watchdog interference. Are you sure you are not having runtime PM enabled. That could be your problem as the host controller code disables sdio irqs. Please see this thread [1]. For our device runtime pm should not be enabled, but I am not sure if that is taken into account in mmc_attach_sdio() (see code below). Gr. AvS [1] http://www.spinics.net/lists/linux-mmc/msg25978.html --8<---------------------------------------------------------------- /* * Enable runtime PM only if supported by host+card+board */ if (host->caps & MMC_CAP_POWER_OFF_CARD) { /* * Let runtime PM core know our card is active */ err = pm_runtime_set_active(&card->dev); if (err) goto remove; /* * Enable runtime PM for this card */ pm_runtime_enable(&card->dev); } > Signed-off-by: Fu zhonghui > --- > drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c | 18 ++++++++++++++++-- > .../net/wireless/brcm80211/brcmfmac/wl_cfg80211.c | 3 ++- > 2 files changed, 18 insertions(+), 3 deletions(-) > > diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c > index 13c89a0..729deab 100644 > --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c > +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c > @@ -34,6 +34,7 @@ > #include > #include > #include > +#include > #include > #include > #include > @@ -43,6 +44,10 @@ > #include "sdio_host.h" > #include "chip.h" > #include "nvram.h" > +#include "dhd.h" > +#include "fwil_types.h" > +#include "p2p.h" > +#include "wl_cfg80211.h" > > #define DCMD_RESP_TIMEOUT 2000 /* In milli second */ > > @@ -307,6 +312,7 @@ struct rte_console { > * when idle > */ > #define BRCMF_IDLE_INTERVAL 1 > +#define BRCMF_IDLE_INTERVAL_SCANNING_CONNECTING 100 > > #define KSO_WAIT_US 50 > #define MAX_KSO_ATTEMPTS (PMU_MAX_TRANSITION_DLY/KSO_WAIT_US) > @@ -3613,9 +3619,9 @@ void brcmf_sdio_isr(struct brcmf_sdio *bus) > > static bool brcmf_sdio_bus_watchdog(struct brcmf_sdio *bus) > { > -#ifdef DEBUG > struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev); > -#endif /* DEBUG */ > + struct brcmf_cfg80211_info *cfg = bus_if->drvr->config; > + struct brcmf_if *ifp = cfg->pub->iflist[0]; > > brcmf_dbg(TIMER, "Enter\n"); > > @@ -3678,6 +3684,14 @@ static bool brcmf_sdio_bus_watchdog(struct brcmf_sdio *bus) > > /* On idle timeout clear activity flag and/or turn off clock */ > if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) { > + > + if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status) || > + test_bit(BRCMF_VIF_STATUS_CONNECTING, &ifp->vif->sme_state)) { > + bus->idletime = BRCMF_IDLE_INTERVAL_SCANNING_CONNECTING; > + } else { > + bus->idletime = BRCMF_IDLE_INTERVAL; > + } > + > if (++bus->idlecount >= bus->idletime) { > bus->idlecount = 0; > if (bus->activity) { > diff --git a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c > index be19852..e76517e 100644 > --- a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c > +++ b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c > @@ -913,6 +913,8 @@ brcmf_cfg80211_escan(struct wiphy *wiphy, struct brcmf_cfg80211_vif *vif, > return -EAGAIN; > } > > + set_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status); > + > /* If scan req comes for p2p0, send it over primary I/F */ > if (vif == cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif) > vif = cfg->p2p.bss_idx[P2PAPI_BSSCFG_PRIMARY].vif; > @@ -933,7 +935,6 @@ brcmf_cfg80211_escan(struct wiphy *wiphy, struct brcmf_cfg80211_vif *vif, > } > > cfg->scan_request = request; > - set_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status); > if (escan_req) { > cfg->escan_info.run = brcmf_run_escan; > err = brcmf_p2p_scan_prep(wiphy, request, vif); > -- 1.7.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/