linux-kernel - Re: [PATCH] wifi: ath12k: fix layout of scan_flags in struct ath12k_wmi_scan_req

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Message-ID: <13582287-09b3-4da8-8d5e-5521777b2758@quicinc.com>
Date:   Mon, 27 Nov 2023 12:20:43 -0800
From:   Jeff Johnson <quic_jjohnson@...cinc.com>
To:     Nicolas Escande <nico.escande@...il.com>,
        Kalle Valo <kvalo@...nel.org>
CC:     <linux-wireless@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <ath12k@...ts.infradead.org>
Subject: Re: [PATCH] wifi: ath12k: fix layout of scan_flags in struct
 ath12k_wmi_scan_req_arg

On 11/27/2023 10:04 AM, Nicolas Escande wrote:
> There is a layout mismatch between the bitfield representing scan_flags in
> struct ath12k_wmi_scan_req_arg & the bits as defined in the WMI_SCAN_XXX
> macros. Fix it by making the biefield match de #define values.
> 
> I especialy checked by adding WMI_SCAN_FLAG_FORCE_ACTIVE_ON_DFS to
> scan_flags and the firmware started to unconditionnaly send probe request
> on DFS channels during scan.
> 
> Tested-on: QCN9274 hw2.0 PCI CI_WLAN.WBE.1.2.1-00148.1-QCAHKSWPL_SILICONZ-7
> 
> Signed-off-by: Nicolas Escande <nico.escande@...il.com>
> ---
>  drivers/net/wireless/ath/ath12k/wmi.h | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/wireless/ath/ath12k/wmi.h b/drivers/net/wireless/ath/ath12k/wmi.h
> index 629373d67421..2b5b46f8898e 100644
> --- a/drivers/net/wireless/ath/ath12k/wmi.h
> +++ b/drivers/net/wireless/ath/ath12k/wmi.h
> @@ -3307,17 +3307,17 @@ struct ath12k_wmi_scan_req_arg {
>  			    scan_f_filter_prb_req:1,
>  			    scan_f_bypass_dfs_chn:1,
>  			    scan_f_continue_on_err:1,
> +			    scan_f_promisc_mode:1,
> +			    scan_f_force_active_dfs_chn:1,
> +			    scan_f_add_tpc_ie_in_probe:1,
> +			    scan_f_add_ds_ie_in_probe:1,
> +			    scan_f_add_spoofed_mac_in_probe:1,
>  			    scan_f_offchan_mgmt_tx:1,
>  			    scan_f_offchan_data_tx:1,
> -			    scan_f_promisc_mode:1,
>  			    scan_f_capture_phy_err:1,
>  			    scan_f_strict_passive_pch:1,
>  			    scan_f_half_rate:1,
>  			    scan_f_quarter_rate:1,
> -			    scan_f_force_active_dfs_chn:1,
> -			    scan_f_add_tpc_ie_in_probe:1,
> -			    scan_f_add_ds_ie_in_probe:1,
> -			    scan_f_add_spoofed_mac_in_probe:1,
>  			    scan_f_add_rand_seq_in_probe:1,
>  			    scan_f_en_ie_whitelist_in_probe:1,
>  			    scan_f_forced:1,

+ath12k mailing list

Repeating my same message from the ath11k patch:

You are convoluting two different data structures.

struct ath12k_wmi_scan_req_arg is used to represent a scan request
within the host driver. This does not use the WMI_SCAN_XXX macros.

struct wmi_start_scan_cmd is used to represent the scan request command
sent to firmware. This struct uses the WMI_SCAN_XXX macros to fill some
members of this struct in ath12k_wmi_copy_scan_event_cntrl_flags().

So your change has no effect on the driver operation and incorrectly
tries to foist the firmware definition upon the host internal
representation.

So NAK to this patch.

/jeff