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70 lines
1.8 KiB
Diff
70 lines
1.8 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Fri, 7 Jun 2024 17:58:54 +0200
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Subject: [PATCH] wifi: cfg80211: add helper for checking if a chandef is
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valid on a radio
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Check if the full channel width is in the radio's frequency range.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/include/net/cfg80211.h
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+++ b/include/net/cfg80211.h
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@@ -6485,6 +6485,15 @@ static inline bool cfg80211_channel_is_p
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}
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/**
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+ * cfg80211_radio_chandef_valid - Check if the radio supports the chandef
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+ *
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+ * @radio: wiphy radio
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+ * @chandef: chandef for current channel
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+ */
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+bool cfg80211_radio_chandef_valid(const struct wiphy_radio *radio,
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+ const struct cfg80211_chan_def *chandef);
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+
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+/**
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* ieee80211_get_response_rate - get basic rate for a given rate
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*
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* @sband: the band to look for rates in
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--- a/net/wireless/util.c
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+++ b/net/wireless/util.c
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@@ -2884,3 +2884,38 @@ cfg80211_get_iftype_ext_capa(struct wiph
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return NULL;
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}
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EXPORT_SYMBOL(cfg80211_get_iftype_ext_capa);
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+
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+static bool
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+ieee80211_radio_freq_range_valid(const struct wiphy_radio *radio,
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+ u32 freq, u32 width)
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+{
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+ const struct wiphy_radio_freq_range *r;
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+ int i;
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+
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+ for (i = 0; i < radio->n_freq_range; i++) {
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+ r = &radio->freq_range[i];
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+ if (freq - width / 2 >= r->start_freq &&
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+ freq + width / 2 <= r->end_freq)
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+ return true;
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+ }
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+
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+ return false;
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+}
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+
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+bool cfg80211_radio_chandef_valid(const struct wiphy_radio *radio,
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+ const struct cfg80211_chan_def *chandef)
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+{
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+ u32 freq, width;
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+
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+ freq = ieee80211_chandef_to_khz(chandef);
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+ width = nl80211_chan_width_to_mhz(chandef->width);
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+ if (!ieee80211_radio_freq_range_valid(radio, freq, width))
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+ return false;
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+
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+ freq = MHZ_TO_KHZ(chandef->center_freq2);
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+ if (freq && !ieee80211_radio_freq_range_valid(radio, freq, width))
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+ return false;
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+
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+ return true;
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+}
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+EXPORT_SYMBOL(cfg80211_radio_chandef_valid);
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