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Commit 9e7251fa authored by Yingying Tang's avatar Yingying Tang Committed by Kalle Valo
Browse files

ath10k: Check tx_stats before use it 



tx_stats will be freed and set to NULL before debugfs_sta node is
removed in station disconnetion process. So if read the debugfs_sta
node there may be NULL pointer error. Add check for tx_stats before
use it to resove this issue.

Signed-off-by: default avatarYingying Tang <yintang@codeaurora.org>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent 49ed34b8

drivers/net/wireless/ath/ath10k/debugfs_sta.c

+7 −0
Original line number Diff line number Diff line
@@ -663,6 +663,13 @@ static ssize_t ath10k_dbg_sta_dump_tx_stats(struct file *file, 


	mutex_lock(&ar->conf_mutex);



	if (!arsta->tx_stats) {

		ath10k_warn(ar, "failed to get tx stats");

		mutex_unlock(&ar->conf_mutex);

		kfree(buf);

		return 0;

	}



	spin_lock_bh(&ar->data_lock);

	for (k = 0; k < ATH10K_STATS_TYPE_MAX; k++) {

		for (j = 0; j < ATH10K_COUNTER_TYPE_MAX; j++) {