From: Felix Fietkau Date: Sun, 5 Mar 2023 16:25:34 +0000 (+0100) Subject: mediatek: backport more WED upstream fixes X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=26b8739b6839e80c836cff0172fb6005c407a520;p=openwrt%2Fstaging%2Fnbd.git mediatek: backport more WED upstream fixes Fixes hang if the WO firmware can't be loaded Signed-off-by: Felix Fietkau --- diff --git a/target/linux/generic/backport-5.15/730-16-v6.3-net-ethernet-mtk_wed-fix-some-possible-NULL-pointer-.patch b/target/linux/generic/backport-5.15/730-16-v6.3-net-ethernet-mtk_wed-fix-some-possible-NULL-pointer-.patch new file mode 100644 index 0000000000..e043a681da --- /dev/null +++ b/target/linux/generic/backport-5.15/730-16-v6.3-net-ethernet-mtk_wed-fix-some-possible-NULL-pointer-.patch @@ -0,0 +1,61 @@ +From: Lorenzo Bianconi +Date: Wed, 7 Dec 2022 15:04:54 +0100 +Subject: [PATCH] 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: 799684448e3e ("net: ethernet: mtk_wed: introduce wed wo support") +Fixes: 4c5de09eb0d0 ("net: ethernet: mtk_wed: add configure wed wo support") +Signed-off-by: Lorenzo Bianconi +Reviewed-by: Leon Romanovsky +Signed-off-by: Jakub Kicinski +--- + +--- a/drivers/net/ethernet/mediatek/mtk_wed.c ++++ b/drivers/net/ethernet/mediatek/mtk_wed.c +@@ -174,9 +174,10 @@ mtk_wed_wo_reset(struct mtk_wed_device * + 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, +@@ -632,9 +633,11 @@ mtk_wed_detach(struct mtk_wed_device *de + 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) { +--- a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c ++++ b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c +@@ -207,6 +207,9 @@ int mtk_wed_mcu_msg_update(struct mtk_we + 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); + } diff --git a/target/linux/generic/backport-5.15/730-17-v6.3-net-ethernet-mtk_wed-fix-possible-deadlock-if-mtk_we.patch b/target/linux/generic/backport-5.15/730-17-v6.3-net-ethernet-mtk_wed-fix-possible-deadlock-if-mtk_we.patch new file mode 100644 index 0000000000..d1c5fb6656 --- /dev/null +++ b/target/linux/generic/backport-5.15/730-17-v6.3-net-ethernet-mtk_wed-fix-possible-deadlock-if-mtk_we.patch @@ -0,0 +1,58 @@ +From: Lorenzo Bianconi +Date: Wed, 7 Dec 2022 15:04:55 +0100 +Subject: [PATCH] net: ethernet: mtk_wed: fix possible deadlock if + mtk_wed_wo_init fails + +Introduce __mtk_wed_detach() in order to avoid a deadlock in +mtk_wed_attach routine if mtk_wed_wo_init fails since both +mtk_wed_attach and mtk_wed_detach run holding hw_lock mutex. + +Fixes: 4c5de09eb0d0 ("net: ethernet: mtk_wed: add configure wed wo support") +Signed-off-by: Lorenzo Bianconi +Reviewed-by: Leon Romanovsky +Signed-off-by: Jakub Kicinski +--- + +--- a/drivers/net/ethernet/mediatek/mtk_wed.c ++++ b/drivers/net/ethernet/mediatek/mtk_wed.c +@@ -619,12 +619,10 @@ mtk_wed_deinit(struct mtk_wed_device *de + } + + static void +-mtk_wed_detach(struct mtk_wed_device *dev) ++__mtk_wed_detach(struct mtk_wed_device *dev) + { + struct mtk_wed_hw *hw = dev->hw; + +- mutex_lock(&hw_lock); +- + mtk_wed_deinit(dev); + + mtk_wdma_rx_reset(dev); +@@ -657,6 +655,13 @@ mtk_wed_detach(struct mtk_wed_device *de + module_put(THIS_MODULE); + + hw->wed_dev = NULL; ++} ++ ++static void ++mtk_wed_detach(struct mtk_wed_device *dev) ++{ ++ mutex_lock(&hw_lock); ++ __mtk_wed_detach(dev); + mutex_unlock(&hw_lock); + } + +@@ -1545,8 +1550,10 @@ mtk_wed_attach(struct mtk_wed_device *de + ret = mtk_wed_wo_init(hw); + } + out: +- if (ret) +- mtk_wed_detach(dev); ++ if (ret) { ++ dev_err(dev->hw->dev, "failed to attach wed device\n"); ++ __mtk_wed_detach(dev); ++ } + unlock: + mutex_unlock(&hw_lock); +