From 2d57aa7bb708ada6e902c200e103d1ece380fb9c Mon Sep 17 00:00:00 2001 From: Roland Vossen Date: Wed, 23 Feb 2011 12:48:53 +0100 Subject: [PATCH] staging: brcm80211: added locks in wl_mac80211.c Increasing robustness of the code, although no problem has been reported in the field. Several code paths were unshielded for multi thread access. Several lock acquisitions have been added to wl_mac80211.c Signed-off-by: Roland Vossen Reviewed-by: Arend van Spriel Reviewed-by: Brett Rudley Signed-off-by: Greg Kroah-Hartman --- drivers/staging/brcm80211/brcmsmac/wl_mac80211.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/staging/brcm80211/brcmsmac/wl_mac80211.c b/drivers/staging/brcm80211/brcmsmac/wl_mac80211.c index 791329cbc8a6..7645c6c972fd 100644 --- a/drivers/staging/brcm80211/brcmsmac/wl_mac80211.c +++ b/drivers/staging/brcm80211/brcmsmac/wl_mac80211.c @@ -172,7 +172,9 @@ static int wl_ops_start(struct ieee80211_hw *hw) */ ieee80211_wake_queues(hw); + WL_LOCK(wl); blocked = wl_rfkill_set_hw_state(wl); + WL_UNLOCK(wl); if (!blocked) wiphy_rfkill_stop_polling(wl->pub->ieee_hw->wiphy); @@ -351,7 +353,9 @@ wl_ops_bss_info_changed(struct ieee80211_hw *hw, val = 1; else val = 0; + WL_LOCK(wl); wlc_set(wl->wlc, WLC_SET_SHORTSLOT_OVERRIDE, val); + WL_UNLOCK(wl); } if (changed & BSS_CHANGED_HT) { @@ -380,8 +384,10 @@ wl_ops_bss_info_changed(struct ieee80211_hw *hw, /* BSSID changed, for whatever reason (IBSS and managed mode) */ WL_NONE("%s: new BSSID: aid %d bss:%pM\n", __func__, info->aid, info->bssid); + WL_LOCK(wl); wlc_set_addrmatch(wl->wlc, RCM_BSSID_OFFSET, info->bssid); + WL_UNLOCK(wl); } if (changed & BSS_CHANGED_BEACON) { /* Beacon data changed, retrieve new beacon (beaconing modes) */ @@ -609,6 +615,7 @@ wl_ops_ampdu_action(struct ieee80211_hw *hw, struct scb *scb = (struct scb *)sta->drv_priv; #endif struct wl_info *wl = hw->priv; + int status; ASSERT(scb->magic == SCB_MAGIC); switch (action) { @@ -619,7 +626,10 @@ wl_ops_ampdu_action(struct ieee80211_hw *hw, WL_NONE("%s: action = IEEE80211_AMPDU_RX_STOP\n", __func__); break; case IEEE80211_AMPDU_TX_START: - if (!wlc_aggregatable(wl->wlc, tid)) { + WL_LOCK(wl); + status = wlc_aggregatable(wl->wlc, tid); + WL_UNLOCK(wl); + if (!status) { /* WL_ERROR("START: tid %d is not agg' able, return FAILURE to stack\n", tid); */ return -1; } @@ -1215,6 +1225,7 @@ static void wl_remove(struct pci_dev *pdev) { struct wl_info *wl; struct ieee80211_hw *hw; + int status; hw = pci_get_drvdata(pdev); wl = HW_TO_WL(hw); @@ -1223,7 +1234,10 @@ static void wl_remove(struct pci_dev *pdev) return; } - if (!wlc_chipmatch(pdev->vendor, pdev->device)) { + WL_LOCK(wl); + status = wlc_chipmatch(pdev->vendor, pdev->device); + WL_UNLOCK(wl); + if (!status) { WL_ERROR("wl: wl_remove: wlc_chipmatch failed\n"); return; } -- 2.11.0