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rsi: fix null pointer dereference during rsi_shutdown()

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Appearently the hw pointer can be NULL while the module is loaded and
in that case rsi_shutdown() crashes due to the unconditional dereference.

Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Martin Kepplinger 2020-01-29 14:02:59 +01:00 committed by Kalle Valo
parent 8299adec99
commit 16bbc3eb83
1 changed files with 6 additions and 3 deletions
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9
drivers/net/wireless/rsi/rsi_91x_sdio.c
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@ -1468,12 +1468,15 @@ static void rsi_shutdown(struct device *dev)
struct rsi_91x_sdiodev *sdev =
(struct rsi_91x_sdiodev *)adapter->rsi_dev;
struct ieee80211_hw *hw = adapter->hw;
struct cfg80211_wowlan *wowlan = hw->wiphy->wowlan_config;
rsi_dbg(ERR_ZONE, "SDIO Bus shutdown =====>\n");
if (rsi_config_wowlan(adapter, wowlan))
rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
if (hw) {
struct cfg80211_wowlan *wowlan = hw->wiphy->wowlan_config;
if (rsi_config_wowlan(adapter, wowlan))
rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
}
if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
adapter->priv->bt_adapter) {