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-rw-r--r--net/wireless/chan.c57
1 files changed, 49 insertions, 8 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index fd556ac05fd..50f6195c8b7 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -54,6 +54,8 @@ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
control_freq = chandef->chan->center_freq;
switch (chandef->width) {
+ case NL80211_CHAN_WIDTH_5:
+ case NL80211_CHAN_WIDTH_10:
case NL80211_CHAN_WIDTH_20:
case NL80211_CHAN_WIDTH_20_NOHT:
if (chandef->center_freq1 != control_freq)
@@ -152,6 +154,12 @@ static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c)
int width;
switch (c->width) {
+ case NL80211_CHAN_WIDTH_5:
+ width = 5;
+ break;
+ case NL80211_CHAN_WIDTH_10:
+ width = 10;
+ break;
case NL80211_CHAN_WIDTH_20:
case NL80211_CHAN_WIDTH_20_NOHT:
width = 20;
@@ -194,6 +202,16 @@ cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1,
if (c1->width == c2->width)
return NULL;
+ /*
+ * can't be compatible if one of them is 5 or 10 MHz,
+ * but they don't have the same width.
+ */
+ if (c1->width == NL80211_CHAN_WIDTH_5 ||
+ c1->width == NL80211_CHAN_WIDTH_10 ||
+ c2->width == NL80211_CHAN_WIDTH_5 ||
+ c2->width == NL80211_CHAN_WIDTH_10)
+ return NULL;
+
if (c1->width == NL80211_CHAN_WIDTH_20_NOHT ||
c1->width == NL80211_CHAN_WIDTH_20)
return c2;
@@ -264,11 +282,17 @@ static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy,
u32 bandwidth)
{
struct ieee80211_channel *c;
- u32 freq;
+ u32 freq, start_freq, end_freq;
+
+ if (bandwidth <= 20) {
+ start_freq = center_freq;
+ end_freq = center_freq;
+ } else {
+ start_freq = center_freq - bandwidth/2 + 10;
+ end_freq = center_freq + bandwidth/2 - 10;
+ }
- for (freq = center_freq - bandwidth/2 + 10;
- freq <= center_freq + bandwidth/2 - 10;
- freq += 20) {
+ for (freq = start_freq; freq <= end_freq; freq += 20) {
c = ieee80211_get_channel(wiphy, freq);
if (!c)
return -EINVAL;
@@ -310,11 +334,17 @@ static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy,
u32 prohibited_flags)
{
struct ieee80211_channel *c;
- u32 freq;
+ u32 freq, start_freq, end_freq;
+
+ if (bandwidth <= 20) {
+ start_freq = center_freq;
+ end_freq = center_freq;
+ } else {
+ start_freq = center_freq - bandwidth/2 + 10;
+ end_freq = center_freq + bandwidth/2 - 10;
+ }
- for (freq = center_freq - bandwidth/2 + 10;
- freq <= center_freq + bandwidth/2 - 10;
- freq += 20) {
+ for (freq = start_freq; freq <= end_freq; freq += 20) {
c = ieee80211_get_channel(wiphy, freq);
if (!c)
return false;
@@ -349,6 +379,12 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
control_freq = chandef->chan->center_freq;
switch (chandef->width) {
+ case NL80211_CHAN_WIDTH_5:
+ width = 5;
+ break;
+ case NL80211_CHAN_WIDTH_10:
+ width = 10;
+ break;
case NL80211_CHAN_WIDTH_20:
if (!ht_cap->ht_supported)
return false;
@@ -405,6 +441,11 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
if (width > 20)
prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
+ /* 5 and 10 MHz are only defined for the OFDM PHY */
+ if (width < 20)
+ prohibited_flags |= IEEE80211_CHAN_NO_OFDM;
+
+
if (!cfg80211_secondary_chans_ok(wiphy, chandef->center_freq1,
width, prohibited_flags))
return false;