Get channel number from ies is a common logic, so seperate it to a new
function, which could also be used by lower driver.
Signed-off-by: Wen Gong <wgong@xxxxxxxxxxxxxx>
---
include/net/cfg80211.h | 9 +++++++++
net/wireless/scan.c | 41 ++++++++++++++++++++++++++---------------
2 files changed, 35 insertions(+), 15 deletions(-)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 911fae42b0c0..2ed677d203a7 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -6268,6 +6268,15 @@ static inline void cfg80211_gen_new_bssid(const u8 *bssid, u8 max_bssid,
u64_to_ether_addr(new_bssid_u64, new_bssid);
}
+/**
+ * cfg80211_get_ies_channel_number - returns the channel number from ies
+ * @ie: ies
+ * @ielen: length of IEs
+ * @band: enum nl80211_band of the channel
+ */
+int cfg80211_get_ies_channel_number(const u8 *ie, size_t ielen,
+ enum nl80211_band band);
+
/**
* cfg80211_is_element_inherited - returns if element ID should be inherited
* @element: element to check
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 019952d4fc7d..a0dd4fa136eb 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1782,25 +1782,13 @@ cfg80211_bss_update(struct cfg80211_registered_device *rdev,
return NULL;
}
-/*
- * Update RX channel information based on the available frame payload
- * information. This is mainly for the 2.4 GHz band where frames can be received
- * from neighboring channels and the Beacon frames use the DSSS Parameter Set
- * element to indicate the current (transmitting) channel, but this might also
- * be needed on other bands if RX frequency does not match with the actual
- * operating channel of a BSS.
- */
-static struct ieee80211_channel *
-cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen,
- struct ieee80211_channel *channel,
- enum nl80211_bss_scan_width scan_width)
+int cfg80211_get_ies_channel_number(const u8 *ie, size_t ielen,
+ enum nl80211_band band)
{
const u8 *tmp;
- u32 freq;
int channel_number = -1;
- struct ieee80211_channel *alt_channel;
- if (channel->band == NL80211_BAND_S1GHZ) {
+ if (band == NL80211_BAND_S1GHZ) {
tmp = cfg80211_find_ie(WLAN_EID_S1G_OPERATION, ie, ielen);
if (tmp && tmp[1] >= sizeof(struct ieee80211_s1g_oper_ie)) {
struct ieee80211_s1g_oper_ie *s1gop = (void *)(tmp + 2);
@@ -1820,6 +1808,29 @@ cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen,
}
}
}
+ return channel_number;
+}
+EXPORT_SYMBOL(cfg80211_get_ies_channel_number);
+
+/*
+ * Update RX channel information based on the available frame payload
+ * information. This is mainly for the 2.4 GHz band where frames can be received
+ * from neighboring channels and the Beacon frames use the DSSS Parameter Set
+ * element to indicate the current (transmitting) channel, but this might also
+ * be needed on other bands if RX frequency does not match with the actual
+ * operating channel of a BSS.
+ */
+static struct ieee80211_channel *
+cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen,
+ struct ieee80211_channel *channel,
+ enum nl80211_bss_scan_width scan_width)
+{
+ const u8 *tmp;
+ u32 freq;
+ int channel_number;
+ struct ieee80211_channel *alt_channel;
+
+ channel_number = cfg80211_get_ies_channel_number(ie, ielen, channel->band);
if (channel_number < 0) {
/* No channel information in frame payload */
--
2.31.1
