target/linux/layerscape/patches-5.4/701-net-0052-sdk_dpaa-ceetm-remove-tc-class-reference-counting.patch

   1 From 024d664114310fe103c2c31f2253bed58238951d Mon Sep 17 00:00:00 2001
   2 From: Camelia Groza <camelia.groza@nxp.com>
   3 Date: Wed, 17 Jan 2018 16:47:07 +0200
   4 Subject: [PATCH] sdk_dpaa: ceetm: remove tc class reference counting
   5
   6 Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
   7 ---
   8  .../ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c   | 38 +++-------------------
   9  .../ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.h   |  1 -
  10  2 files changed, 4 insertions(+), 35 deletions(-)
  11
  12 --- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
  13 +++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.c
  14 @@ -774,7 +774,6 @@ static int ceetm_init_prio(struct Qdisc
  15                 }
  16
  17                 child_cl->common.classid = TC_H_MAKE(sch->handle, (i + 1));
  18 -               child_cl->refcnt = 1;
  19                 child_cl->parent = sch;
  20                 child_cl->type = CEETM_PRIO;
  21                 child_cl->shaped = priv->shaped;
  22 @@ -986,7 +985,6 @@ static int ceetm_init_wbfs(struct Qdisc
  23                 }
  24
  25                 child_cl->common.classid = TC_H_MAKE(sch->handle, (i + 1));
  26 -               child_cl->refcnt = 1;
  27                 child_cl->parent = sch;
  28                 child_cl->type = CEETM_WBFS;
  29                 child_cl->shaped = priv->shaped;
  30 @@ -1297,29 +1295,9 @@ static void ceetm_attach(struct Qdisc *s
  31         }
  32  }
  33
  34 -static unsigned long ceetm_cls_get(struct Qdisc *sch, u32 classid)
  35 +static unsigned long ceetm_cls_search(struct Qdisc *sch, u32 handle)
  36  {
  37 -       struct ceetm_class *cl;
  38 -
  39 -       pr_debug(KBUILD_BASENAME " : %s : classid %X from qdisc %X\n",
  40 -                __func__, classid, sch->handle);
  41 -       cl = ceetm_find(classid, sch);
  42 -
  43 -       if (cl)
  44 -               cl->refcnt++; /* Will decrement in put() */
  45 -       return (unsigned long)cl;
  46 -}
  47 -
  48 -static void ceetm_cls_put(struct Qdisc *sch, unsigned long arg)
  49 -{
  50 -       struct ceetm_class *cl = (struct ceetm_class *)arg;
  51 -
  52 -       pr_debug(KBUILD_BASENAME " : %s : classid %X from qdisc %X\n",
  53 -                __func__, cl->common.classid, sch->handle);
  54 -       cl->refcnt--;
  55 -
  56 -       if (cl->refcnt == 0)
  57 -               ceetm_cls_destroy(sch, cl);
  58 +       return (unsigned long)ceetm_find(handle, sch);
  59  }
  60
  61  static int ceetm_cls_change_root(struct ceetm_class *cl,
  62 @@ -1540,7 +1518,6 @@ static int ceetm_cls_change(struct Qdisc
  63         cl->root.tbl = copt->tbl;
  64
  65         cl->common.classid = classid;
  66 -       cl->refcnt = 1;
  67         cl->parent = sch;
  68         cl->root.child = NULL;
  69         cl->root.wbfs_grp_a = false;
  70 @@ -1696,15 +1673,9 @@ static int ceetm_cls_delete(struct Qdisc
  71
  72         sch_tree_lock(sch);
  73         qdisc_class_hash_remove(&priv->clhash, &cl->common);
  74 -       cl->refcnt--;
  75 -
  76 -       /* The refcnt should be at least 1 since we have incremented it in
  77 -        * get(). Will decrement again in put() where we will call destroy()
  78 -        * to actually free the memory if it reaches 0.
  79 -        */
  80 -       WARN_ON(cl->refcnt == 0);
  81
  82         sch_tree_unlock(sch);
  83 +       ceetm_cls_destroy(sch, cl);
  84         return 0;
  85  }
  86
  87 @@ -1824,8 +1795,7 @@ static void ceetm_tcf_unbind(struct Qdis
  88  const struct Qdisc_class_ops ceetm_cls_ops = {
  89         .graft          =       ceetm_cls_graft,
  90         .leaf           =       ceetm_cls_leaf,
  91 -       .get            =       ceetm_cls_get,
  92 -       .put            =       ceetm_cls_put,
  93 +       .find           =       ceetm_cls_search,
  94         .change         =       ceetm_cls_change,
  95         .delete         =       ceetm_cls_delete,
  96         .walk           =       ceetm_cls_walk,
  97 --- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.h
  98 +++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_ceetm.h
  99 @@ -191,7 +191,6 @@ struct wbfs_c {
 100
 101  struct ceetm_class {
 102         struct Qdisc_class_common common;
 103 -       int refcnt; /* usage count of this class */
 104         struct tcf_proto *filter_list; /* class attached filters */
 105         struct tcf_block *block;
 106         struct Qdisc *parent;