On 4/17/2025 1:09 PM, Rameshkumar Sundaram wrote:
When two split-phy devices that support overlapping frequency ranges within the same band are grouped into an ath12k hardware (HW) setup, they share a common wiphy instance. Consequently, the channel list (wiphy->bands[]) becomes unified across all associated radios (ar). For reference, the devices are: 2.4 GHz + 5 GHz Low Band 5 GHz High Band + 6 GHz The first radio probed within the 5 GHz range (say 5 GHz Low Band) updates its sband reference (&ar->mac.sbands[NL80211_BAND_5GHZ]) within wiphy->bands[]. However, when the second 5 GHz radio (5 GHz High Band) is probed, it replaces the existing wiphy->bands[] entry with its own sub-band reference. As a result, wiphy->bands[] always reflects the channel list from the most recently probed radio in that band, restricting supported channels to those within its specific range for upper-layer. Fix this by updating the wiphy->bands[] to just enable the channels of current radio when there exist a radio which already has set it. This will make sure wiphy->bands[] holds reference of first radio which got probed in 5 GHz band and subsequent radio just updates the channel list in the same address space. Since same sband memory space is shared between radios of a band, while determining the allowed frequency range of radio, its frequency limits (ar->freq_range.start_freq, end_freq) should be used. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1 Signed-off-by: Rameshkumar Sundaram <rameshkumar.sundaram@xxxxxxxxxxxxxxxx>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@xxxxxxxxxxxxxxxx>
