Commit c79e0af5 authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Jakub Kicinski

net: ethernet: mtk_wed: fix some possible NULL pointer dereferences

Fix possible NULL pointer dereference in mtk_wed_detach routine checking
wo pointer is properly allocated before running mtk_wed_wo_reset() and
mtk_wed_wo_deinit().
Even if it is just a theoretical issue at the moment check wo pointer is
not NULL in mtk_wed_mcu_msg_update.
Moreover, honor mtk_wed_mcu_send_msg return value in mtk_wed_wo_reset()

Fixes: 79968444 ("net: ethernet: mtk_wed: introduce wed wo support")
Fixes: 4c5de09e ("net: ethernet: mtk_wed: add configure wed wo support")
Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: default avatarLeon Romanovsky <leonro@nvidia.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 3df96774
......@@ -174,9 +174,10 @@ mtk_wed_wo_reset(struct mtk_wed_device *dev)
mtk_wdma_tx_reset(dev);
mtk_wed_reset(dev, MTK_WED_RESET_WED);
mtk_wed_mcu_send_msg(wo, MTK_WED_MODULE_ID_WO,
MTK_WED_WO_CMD_CHANGE_STATE, &state,
sizeof(state), false);
if (mtk_wed_mcu_send_msg(wo, MTK_WED_MODULE_ID_WO,
MTK_WED_WO_CMD_CHANGE_STATE, &state,
sizeof(state), false))
return;
if (readx_poll_timeout(mtk_wed_wo_read_status, dev, val,
val == MTK_WED_WOIF_DISABLE_DONE,
......@@ -590,9 +591,11 @@ mtk_wed_detach(struct mtk_wed_device *dev)
mtk_wed_free_tx_rings(dev);
if (mtk_wed_get_rx_capa(dev)) {
mtk_wed_wo_reset(dev);
if (hw->wed_wo)
mtk_wed_wo_reset(dev);
mtk_wed_free_rx_rings(dev);
mtk_wed_wo_deinit(hw);
if (hw->wed_wo)
mtk_wed_wo_deinit(hw);
}
if (dev->wlan.bus_type == MTK_WED_BUS_PCIE) {
......
......@@ -207,6 +207,9 @@ int mtk_wed_mcu_msg_update(struct mtk_wed_device *dev, int id, void *data,
if (dev->hw->version == 1)
return 0;
if (WARN_ON(!wo))
return -ENODEV;
return mtk_wed_mcu_send_msg(wo, MTK_WED_MODULE_ID_WO, id, data, len,
true);
}
......
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