xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

brcmsmac: use channel flags to restrict OFDM

Browse Source 
brcmsmac cannot call freq_reg_info() during channel changes as it does
not hold cfg80211_lock, and as a result it generates a lockdep warning.
freq_reg_info() is being used to determine whether OFDM is allowed on
the current channel, so we can avoid the errant call by using the new
IEEE80211_CHAN_NO_OFDM for this purpose instead.

Reported-by: Josh Boyer <jwboyer@redhat.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Seth Forshee
2012-08-01 15:58:43 -05:00
committed by John W. Linville
parent 8c1057e43c
commit 7f38e5bc93
2 changed files with 3 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/net/wireless/brcm80211/brcmsmac/channel.c
View File

@@ -382,9 +382,7 @@ brcms_c_channel_set_chanspec(struct brcms_cm_info *wlc_cm, u16 chanspec,
{ {
struct brcms_c_info *wlc = wlc_cm->wlc; struct brcms_c_info *wlc = wlc_cm->wlc;
struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.channel; struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.channel;
const struct ieee80211_reg_rule *reg_rule;
struct txpwr_limits txpwr; struct txpwr_limits txpwr;
int ret;
brcms_c_channel_reg_limits(wlc_cm, chanspec, &txpwr); brcms_c_channel_reg_limits(wlc_cm, chanspec, &txpwr);
@@ -393,8 +391,7 @@ brcms_c_channel_set_chanspec(struct brcms_cm_info *wlc_cm, u16 chanspec,
); );
/* set or restore gmode as required by regulatory */ /* set or restore gmode as required by regulatory */
ret = freq_reg_info(wlc->wiphy, ch->center_freq, 0, &reg_rule); if (ch->flags & IEEE80211_CHAN_NO_OFDM)
if (!ret && (reg_rule->flags & NL80211_RRF_NO_OFDM))
brcms_c_set_gmode(wlc, GMODE_LEGACY_B, false); brcms_c_set_gmode(wlc, GMODE_LEGACY_B, false);
else else
brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false); brcms_c_set_gmode(wlc, wlc->protection->gmode_user, false);

3
drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
View File

@@ -121,7 +121,8 @@ static struct ieee80211_channel brcms_2ghz_chantable[] = {
IEEE80211_CHAN_NO_HT40PLUS), IEEE80211_CHAN_NO_HT40PLUS),
CHAN2GHZ(14, 2484, CHAN2GHZ(14, 2484,
IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_IBSS | IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_NO_IBSS |
IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS) IEEE80211_CHAN_NO_HT40PLUS | IEEE80211_CHAN_NO_HT40MINUS |
IEEE80211_CHAN_NO_OFDM)
}; };
static struct ieee80211_channel brcms_5ghz_nphy_chantable[] = { static struct ieee80211_channel brcms_5ghz_nphy_chantable[] = {