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authorWen Gong <wgong@codeaurora.org>2021-09-30 04:15:33 -0400
committerJohannes Berg <johannes.berg@intel.com>2021-10-21 17:25:16 +0200
commit97981d89a1d47942a2d7517631d2400b99fe3f93 (patch)
tree37492dae2e3cd18b5cacc2d8dedf7448f3135561 /net/wireless/scan.c
parentf2622138f9352a2be7a45dfe430c88bbfe6218d3 (diff)
cfg80211: separate get channel number from ies
Get channel number from ies is a common logic, so separate it to a new function, which could also be used by lower driver. Signed-off-by: Wen Gong <wgong@codeaurora.org> Link: https://lore.kernel.org/r/20210930081533.4898-1-wgong@codeaurora.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless/scan.c')
-rw-r--r--net/wireless/scan.c41
1 files changed, 26 insertions, 15 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 0273f20291c4..e4f79b23f7f6 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1791,25 +1791,13 @@ 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);
@@ -1830,6 +1818,29 @@ 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)
+{
+ 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 */
return channel;