[PATCH 4/4] mwifiex: don't leak 'chan_stats' on reset
From: Brian Norris
Date: Fri Apr 14 2017 - 17:52:34 EST
'chan_stats' is (re)allocated in _mwifiex_fw_dpc() ->
mwifiex_init_channel_scan_gap(), which is called whenever the device is
initialized -- at probe or at reset.
But we only free it in we completely unregister the adapter, meaning we
leak a copy of it during every reset.
Let's free it in the shutdown / removal paths instead (and in the
error-handling path), to avoid the leak.
Ideally, we can eventually unify much of mwifiex_shutdown_sw() and
mwifiex_remove_card() (way too much copy-and-paste) to reduce the burden
on bugfixes like this. But that's work for tomorrow.
Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>
---
Technically a bugfix, but I don't know where to "blame" it.
drivers/net/wireless/marvell/mwifiex/main.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/marvell/mwifiex/main.c b/drivers/net/wireless/marvell/mwifiex/main.c
index 89eccd7adbe5..31fa62c4c148 100644
--- a/drivers/net/wireless/marvell/mwifiex/main.c
+++ b/drivers/net/wireless/marvell/mwifiex/main.c
@@ -149,7 +149,6 @@ static int mwifiex_unregister(struct mwifiex_adapter *adapter)
kfree(adapter->regd);
- vfree(adapter->chan_stats);
kfree(adapter);
return 0;
}
@@ -633,6 +632,7 @@ static int _mwifiex_fw_dpc(const struct firmware *firmware, void *context)
goto done;
err_add_intf:
+ vfree(adapter->chan_stats);
wiphy_unregister(adapter->wiphy);
wiphy_free(adapter->wiphy);
err_init_fw:
@@ -1417,6 +1417,7 @@ mwifiex_shutdown_sw(struct mwifiex_adapter *adapter)
mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
rtnl_unlock();
}
+ vfree(adapter->chan_stats);
mwifiex_dbg(adapter, INFO, "%s, successful\n", __func__);
exit_return:
@@ -1728,6 +1729,7 @@ int mwifiex_remove_card(struct mwifiex_adapter *adapter)
mwifiex_del_virtual_intf(adapter->wiphy, &priv->wdev);
rtnl_unlock();
}
+ vfree(adapter->chan_stats);
wiphy_unregister(adapter->wiphy);
wiphy_free(adapter->wiphy);
--
2.12.2.762.g0e3151a226-goog