Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755036AbaFKDxh (ORCPT ); Tue, 10 Jun 2014 23:53:37 -0400 Received: from mga11.intel.com ([192.55.52.93]:4050 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751634AbaFKDxf (ORCPT ); Tue, 10 Jun 2014 23:53:35 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,455,1400050800"; d="scan'208,223";a="553609583" Message-ID: <5397D293.2000401@linux.intel.com> Date: Wed, 11 Jun 2014 11:52:51 +0800 From: "Fu, Zhonghui" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: [PATCH] brcmfmac: prevent watchdog from interfering with scanning and connecting Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >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. 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/