diff options
| author | Yingying Tang <yintang@codeaurora.org> | 2019-05-02 21:36:50 +0800 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2019-05-07 17:03:47 +0300 |
| commit | 9e7251fa38978b85108c44743e1436d48e8d0d76 (patch) | |
| tree | a6ad160e5b8f3372eca3442a8a6551a731dcc1ad /drivers/net/wireless/ath/ath10k | |
| parent | 49ed34b835e231aa941257394716bc689bc98d9f (diff) | |
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: Yingying Tang <yintang@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/ath/ath10k')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/debugfs_sta.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath10k/debugfs_sta.c b/drivers/net/wireless/ath/ath10k/debugfs_sta.c index c704ae371c4d..42931a669b02 100644 --- a/drivers/net/wireless/ath/ath10k/debugfs_sta.c +++ b/drivers/net/wireless/ath/ath10k/debugfs_sta.c @@ -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++) { |