[PATCH] wifi: ath10k: fix the stack frame size warning in ath10k_remain_on_channel

[Miaoqing Pan <quic_miaoqing@xxxxxxxxxxx>]

Fix the following W=1 kernel build warning:

drivers/net/wireless/ath/ath10k/mac.c: In function ‘ath10k_remain_on_channel’:
drivers/net/wireless/ath/ath10k/mac.c:7980:1: warning: the frame size of 1064 bytes is larger than 1024 bytes [-Wframe-larger-than=]

Compile tested only.

Signed-off-by: Miaoqing Pan <quic_miaoqing@xxxxxxxxxxx>
---
 drivers/net/wireless/ath/ath10k/mac.c | 35 ++++++++++++++++-----------
 1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index a5da32e87106..9bfa55dede31 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -7899,7 +7899,7 @@ static int ath10k_remain_on_channel(struct ieee80211_hw *hw,
 {
 	struct ath10k *ar = hw->priv;
 	struct ath10k_vif *arvif = (void *)vif->drv_priv;
-	struct wmi_start_scan_arg arg;
+	struct wmi_start_scan_arg *arg = NULL;
 	int ret = 0;
 	u32 scan_time_msec;
 
@@ -7936,20 +7936,25 @@ static int ath10k_remain_on_channel(struct ieee80211_hw *hw,
 
 	scan_time_msec = ar->hw->wiphy->max_remain_on_channel_duration * 2;
 
-	memset(&arg, 0, sizeof(arg));
-	ath10k_wmi_start_scan_init(ar, &arg);
-	arg.vdev_id = arvif->vdev_id;
-	arg.scan_id = ATH10K_SCAN_ID;
-	arg.n_channels = 1;
-	arg.channels[0] = chan->center_freq;
-	arg.dwell_time_active = scan_time_msec;
-	arg.dwell_time_passive = scan_time_msec;
-	arg.max_scan_time = scan_time_msec;
-	arg.scan_ctrl_flags |= WMI_SCAN_FLAG_PASSIVE;
-	arg.scan_ctrl_flags |= WMI_SCAN_FILTER_PROBE_REQ;
-	arg.burst_duration_ms = duration;
+	arg = kzalloc(sizeof(*arg), GFP_KERNEL);
+	if (!arg) {
+		ret = -ENOMEM;
+		goto exit;
+	}
 
-	ret = ath10k_start_scan(ar, &arg);
+	ath10k_wmi_start_scan_init(ar, arg);
+	arg->vdev_id = arvif->vdev_id;
+	arg->scan_id = ATH10K_SCAN_ID;
+	arg->n_channels = 1;
+	arg->channels[0] = chan->center_freq;
+	arg->dwell_time_active = scan_time_msec;
+	arg->dwell_time_passive = scan_time_msec;
+	arg->max_scan_time = scan_time_msec;
+	arg->scan_ctrl_flags |= WMI_SCAN_FLAG_PASSIVE;
+	arg->scan_ctrl_flags |= WMI_SCAN_FILTER_PROBE_REQ;
+	arg->burst_duration_ms = duration;
+
+	ret = ath10k_start_scan(ar, arg);
 	if (ret) {
 		ath10k_warn(ar, "failed to start roc scan: %d\n", ret);
 		spin_lock_bh(&ar->data_lock);
@@ -7975,6 +7980,8 @@ static int ath10k_remain_on_channel(struct ieee80211_hw *hw,
 
 	ret = 0;
 exit:
+	kfree(arg);
+
 	mutex_unlock(&ar->conf_mutex);
 	return ret;
 }
-- 
2.25.1