kernel: delete Linux 5.4 config and patches

[openwrt/staging/chunkeey.git] / target / linux / layerscape / patches-5.4 / 701-net-0065-sdk_dpaa-ceetm-avoid-use-after-free-scenarios.patch

diff --git a/target/linux/layerscape/patches-5.4/701-net-0065-sdk_dpaa-ceetm-avoid-use-after-free-scenarios.patch b/target/linux/layerscape/patches-5.4/701-net-0065-sdk_dpaa-ceetm-avoid-use-after-free-scenarios.patch
deleted file mode 100644 (file)
index f3d591e..0000000
--- a/target/linux/layerscape/patches-5.4/701-net-0065-sdk_dpaa-ceetm-avoid-use-after-free-scenarios.patch
+++ /dev/null
@@ -1,67 +0,0 @@
-From fad6f73dc4367adb852ce6953f93f12cbb97b894 Mon Sep 17 00:00:00 2001
-From: Camelia Groza <camelia.groza@nxp.com>
-Date: Fri, 18 May 2018 10:33:37 +0300
-Subject: [PATCH] sdk_dpaa: ceetm: avoid use-after-free scenarios
-
-Once the pfiofo qdiscs are grafted to the netdev queues, they are destroyed
-by the kernel when required. Remove references to the pfifo qdiscs after
-grafting, in order to avoid double free scenarios.
-
-Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
----
- .../ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c   | 23 +++++++++++++++++++---
- 1 file changed, 20 insertions(+), 3 deletions(-)
-
---- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
-+++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
-@@ -477,7 +477,9 @@ static void ceetm_destroy(struct Qdisc *
-               if (!priv->root.qdiscs)
-                       break;
- 
--              /* Remove the pfifo qdiscs */
-+              /* Destroy the pfifo qdiscs in case they haven't been attached
-+               * to the netdev queues yet.
-+               */
-               for (ntx = 0; ntx < dev->num_tx_queues; ntx++)
-                       if (priv->root.qdiscs[ntx])
-                               qdisc_destroy(priv->root.qdiscs[ntx]);
-@@ -608,7 +610,16 @@ static int ceetm_init_root(struct Qdisc
-               goto err_init_root;
-       }
- 
--      /* pre-allocate underlying pfifo qdiscs */
-+      /* Pre-allocate underlying pfifo qdiscs.
-+       *
-+       * We want to offload shaping and scheduling decisions to the hardware.
-+       * The pfifo qdiscs will be attached to the netdev queues and will
-+       * guide the traffic from the IP stack down to the driver with minimum
-+       * interference.
-+       *
-+       * The CEETM qdiscs and classes will be crossed when the traffic
-+       * reaches the driver.
-+       */
-       priv->root.qdiscs = kcalloc(dev->num_tx_queues,
-                                   sizeof(priv->root.qdiscs[0]),
-                                   GFP_KERNEL);
-@@ -1280,7 +1291,10 @@ static int ceetm_change(struct Qdisc *sc
-       return ret;
- }
- 
--/* Attach the underlying pfifo qdiscs */
-+/* Graft the underlying pfifo qdiscs to the netdev queues.
-+ * It's safe to remove our references at this point, since the kernel will
-+ * destroy the qdiscs on its own and no cleanup from our part is required.
-+ */
- static void ceetm_attach(struct Qdisc *sch)
- {
-       struct net_device *dev = qdisc_dev(sch);
-@@ -1296,6 +1310,9 @@ static void ceetm_attach(struct Qdisc *s
-               if (old_qdisc)
-                       qdisc_destroy(old_qdisc);
-       }
-+
-+      kfree(priv->root.qdiscs);
-+      priv->root.qdiscs = NULL;
- }
- 
- static unsigned long ceetm_cls_search(struct Qdisc *sch, u32 handle)