From 78e3e6094220a71504e7136c42b49fc8ed3a72b4 Mon Sep 17 00:00:00 2001
From: Wen Gong <quic_wgong@quicinc.com>
Date: Mon, 21 Mar 2022 13:17:03 +0200
Subject: [PATCH] ath11k: Add hw-restart option to simulate_fw_crash
Git-commit: 78e3e6094220a71504e7136c42b49fc8ed3a72b4
Patch-mainline: v5.19-rc1
References: bsc#1206451

Add hw-restart to directly restart wlan. Like UTF mode start it will
restart hardware and download firmware again.

Usage: 
1. Run command:
   echo hw-restart > /sys/kernel/debug/ath11k/qca6390\ hw2.0/simulate_fw_crash
   echo hw-restart > /sys/kernel/debug/ath11k/wcn6855\ hw2.0/simulate_fw_crash
2. wlan will be restart and do recovery process and success.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03003-QCAHSPSWPL_V1_V2_SILICONZ_LITE-2

Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220228064606.8981-4-quic_wgong@quicinc.com
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/ath/ath11k/debugfs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/ath/ath11k/debugfs.c b/drivers/net/wireless/ath/ath11k/debugfs.c
index a82266c8befc..9648e0017393 100644
--- a/drivers/net/wireless/ath/ath11k/debugfs.c
+++ b/drivers/net/wireless/ath/ath11k/debugfs.c
@@ -596,6 +596,10 @@ static ssize_t ath11k_write_simulate_fw_crash(struct file *file,
 		ret = ath11k_wmi_force_fw_hang_cmd(ar,
 						   ATH11K_WMI_FW_HANG_ASSERT_TYPE,
 						   ATH11K_WMI_FW_HANG_DELAY);
+	} else if (!strcmp(buf, "hw-restart")) {
+		ath11k_info(ab, "user requested hw restart\n");
+		queue_work(ab->workqueue_aux, &ab->reset_work);
+		ret = 0;
 	} else {
 		ret = -EINVAL;
 		goto exit;
-- 
2.35.3