linux-kernel - [PATCH ath-next v4 7/9] wifi: ath12k: handle ath12k_core

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Message-Id: <20250408-fix_reboot_issues_with_hw_grouping-v4-7-95e7bf048595@oss.qualcomm.com>
Date: Tue, 08 Apr 2025 11:36:35 +0530
From: Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>
To: Johannes Berg <johannes@...solutions.net>,
        Jeff Johnson <jjohnson@...nel.org>,
        Karthikeyan Periyasamy <quic_periyasa@...cinc.com>,
        Kalle Valo <kvalo@...nel.org>, Harshitha Prem <quic_hprem@...cinc.com>
Cc: Jeff Johnson <jeff.johnson@....qualcomm.com>,
        linux-wireless@...r.kernel.org, ath12k@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>
Subject: [PATCH ath-next v4 7/9] wifi: ath12k: handle ath12k_core_restart()
 with hardware grouping

Currently, when ath12k_core_restart() is called and the ab->is_reset flag
is set, it invokes ieee80211_restart_hw() for all hardware in the same
group. However, other hardware might still be in the recovery process,
making this call inappropriate with grouping into picture.

To address this, add a condition to check if the group is ready. If the
group is not ready, do not call ieee80211_restart_hw().

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>
---
 drivers/net/wireless/ath/ath12k/core.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/core.c b/drivers/net/wireless/ath/ath12k/core.c
index 0fb3e57cd254ede767528e47e1d9d183257e5b71..a1c9b8771e9c4c84548da2cb4054b0403aa8c759 100644
--- a/drivers/net/wireless/ath/ath12k/core.c
+++ b/drivers/net/wireless/ath/ath12k/core.c
@@ -1560,12 +1560,22 @@ static void ath12k_core_restart(struct work_struct *work)
 			ath12k_dbg(ab, ATH12K_DBG_BOOT, "reset success\n");
 		}
 
+		mutex_lock(&ag->mutex);
+
+		if (!ath12k_core_hw_group_start_ready(ag)) {
+			mutex_unlock(&ag->mutex);
+			goto exit_restart;
+		}
+
 		for (i = 0; i < ag->num_hw; i++) {
-			ah = ath12k_ag_to_ah(ab->ag, i);
+			ah = ath12k_ag_to_ah(ag, i);
 			ieee80211_restart_hw(ah->hw);
 		}
+
+		mutex_unlock(&ag->mutex);
 	}
 
+exit_restart:
 	complete(&ab->restart_completed);
 }
 

-- 
2.34.1