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wifi: ath11k: fix Tx power value during active CAC

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Tx power is fetched from firmware's pdev stats. However, during active
CAC, firmware does not fill the current Tx power and sends the max
initialised value filled during firmware init. If host sends this power
to user space, this is wrong since in certain situations, the Tx power
could be greater than the max allowed by the regulatory. Hence, host
should not be fetching the Tx power during an active CAC.

Fix this issue by returning -EAGAIN error so that user space knows that there's
no valid value available.

Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1

Fixes: 9a2aa68afe ("wifi: ath11k: add get_txpower mac ops")
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230912051857.2284-4-quic_adisi@quicinc.com
This commit is contained in:
Aditya Kumar Singh
2023-10-03 17:26:54 +03:00
committed by Kalle Valo
parent 69fcb52590
commit 77f1ee6fd8
1 changed files with 8 additions and 0 deletions
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8
drivers/net/wireless/ath/ath11k/mac.c
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@@ -9060,6 +9060,14 @@ static int ath11k_mac_op_get_txpower(struct ieee80211_hw *hw,
if (ar->state != ATH11K_STATE_ON)
goto err_fallback;
/* Firmware doesn't provide Tx power during CAC hence no need to fetch
* the stats.
*/
if (test_bit(ATH11K_CAC_RUNNING, &ar->dev_flags)) {
mutex_unlock(&ar->conf_mutex);
return -EAGAIN;
}
req_param.pdev_id = ar->pdev->pdev_id;
req_param.stats_id = WMI_REQUEST_PDEV_STAT;