[PATCH ath-next] wifi: ath12k: Add fallback for invalid channel number in PHY metadata

[Vasanthakumar Thiagarajan]

On 7/24/2025 12:36 AM, Aishwarya R wrote:
> From: Sriram R <quic_srirrama at quicinc.com>
> 
> Currently, ath12k_dp_rx_h_ppdu() determines the band and frequency
> based on the channel number and center frequency from the RX descriptor's
> PHY metadata. However, in rare cases, it is observed that frequency
> retrieved from the metadata may be invalid or unexpected especially for
> 6 GHz frames.
> This can result in a NULL sband, which prevents proper frequency assignment
> in rx_status and potentially leading to incorrect RX packet classification.
> 
> To fix this potential issue, add a fallback mechanism that uses
> ar->rx_channel to populate the band and frequency when the derived
> sband is invalid or missing.
> 
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
> 
> Fixes: d889913205cf ("wifi: ath12k: driver for Qualcomm Wi-Fi 7 devices")
> Signed-off-by: Sriram R <quic_srirrama at quicinc.com>
> Co-developed-by: Vinith Kumar R <quic_vinithku at quicinc.com>
> Signed-off-by: Vinith Kumar R <quic_vinithku at quicinc.com>
> Signed-off-by: Aishwarya R <aishwarya.r at oss.qualcomm.com>

Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan at oss.qualcomm.com>