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: 799684448e ("net: ethernet: mtk_wed: introduce wed wo support")
Fixes: 4c5de09eb0 ("net: ethernet: mtk_wed: add configure wed wo support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Lorenzo Bianconi 2022-12-07 15:04:54 +01:00 коммит произвёл Jakub Kicinski
Родитель 3df96774a4
Коммит c79e0af5ae
2 изменённых файлов: 11 добавлений и 5 удалений

Просмотреть файл

@ -174,9 +174,10 @@ mtk_wed_wo_reset(struct mtk_wed_device *dev)
mtk_wdma_tx_reset(dev); mtk_wdma_tx_reset(dev);
mtk_wed_reset(dev, MTK_WED_RESET_WED); mtk_wed_reset(dev, MTK_WED_RESET_WED);
mtk_wed_mcu_send_msg(wo, MTK_WED_MODULE_ID_WO, if (mtk_wed_mcu_send_msg(wo, MTK_WED_MODULE_ID_WO,
MTK_WED_WO_CMD_CHANGE_STATE, &state, MTK_WED_WO_CMD_CHANGE_STATE, &state,
sizeof(state), false); sizeof(state), false))
return;
if (readx_poll_timeout(mtk_wed_wo_read_status, dev, val, if (readx_poll_timeout(mtk_wed_wo_read_status, dev, val,
val == MTK_WED_WOIF_DISABLE_DONE, val == MTK_WED_WOIF_DISABLE_DONE,
@ -590,8 +591,10 @@ mtk_wed_detach(struct mtk_wed_device *dev)
mtk_wed_free_tx_rings(dev); mtk_wed_free_tx_rings(dev);
if (mtk_wed_get_rx_capa(dev)) { if (mtk_wed_get_rx_capa(dev)) {
if (hw->wed_wo)
mtk_wed_wo_reset(dev); mtk_wed_wo_reset(dev);
mtk_wed_free_rx_rings(dev); mtk_wed_free_rx_rings(dev);
if (hw->wed_wo)
mtk_wed_wo_deinit(hw); mtk_wed_wo_deinit(hw);
} }

Просмотреть файл

@ -207,6 +207,9 @@ int mtk_wed_mcu_msg_update(struct mtk_wed_device *dev, int id, void *data,
if (dev->hw->version == 1) if (dev->hw->version == 1)
return 0; return 0;
if (WARN_ON(!wo))
return -ENODEV;
return mtk_wed_mcu_send_msg(wo, MTK_WED_MODULE_ID_WO, id, data, len, return mtk_wed_mcu_send_msg(wo, MTK_WED_MODULE_ID_WO, id, data, len,
true); true);
} }