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Non-HT frames can only be encoded in 20 MHz, however, they could be duplicated on all/some of the subchannels (mostly used for RTS/CTS), in which case the firmware will report and estimate of the overall used bandwidth based on energy detected. This could be confusing so don't report it that way, always use 20 MHz for non-HT/legacy frames instead. Note that currently the value doesn't appear to be used by mac80211, it never checks the bandwidth field for legacy encodings. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Reviewed-by: Benjamin Berg <benjamin.berg@intel.com> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com> Link: https://patch.msgid.link/20251019114304.23e6695039ca.I3da7c542bde6de4362755f200248dbcc12aa246e@changeid