package/kernel/mac80211/patches/319-brcmfmac-consolidate-ifp-lookup-in-driver-core.patch

   1 From: Arend van Spriel <arend@broadcom.com>
   2 Date: Wed, 26 Aug 2015 22:14:53 +0200
   3 Subject: [PATCH] brcmfmac: consolidate ifp lookup in driver core
   4
   5 In rx path the firmware provide an interface index which is used to
   6 map to a struct brcmf_if instance. However, this involves some trick
   7 that is done in two places. This is changed by having driver core
   8 providing brcmf_get_ifp() function.
   9
  10 Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
  11 Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
  12 Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
  13 Signed-off-by: Arend van Spriel <arend@broadcom.com>
  14 ---
  15
  16 --- a/drivers/net/wireless/brcm80211/brcmfmac/bcdc.c
  17 +++ b/drivers/net/wireless/brcm80211/brcmfmac/bcdc.c
  18 @@ -276,6 +276,7 @@ brcmf_proto_bcdc_hdrpull(struct brcmf_pu
  19                          struct sk_buff *pktbuf)
  20  {
  21         struct brcmf_proto_bcdc_header *h;
  22 +       struct brcmf_if *ifp;
  23
  24         brcmf_dbg(BCDC, "Enter\n");
  25
  26 @@ -289,30 +290,21 @@ brcmf_proto_bcdc_hdrpull(struct brcmf_pu
  27         trace_brcmf_bcdchdr(pktbuf->data);
  28         h = (struct brcmf_proto_bcdc_header *)(pktbuf->data);
  29
  30 -       *ifidx = BCDC_GET_IF_IDX(h);
  31 -       if (*ifidx >= BRCMF_MAX_IFS) {
  32 -               brcmf_err("rx data ifnum out of range (%d)\n", *ifidx);
  33 +       ifp = brcmf_get_ifp(drvr, BCDC_GET_IF_IDX(h));
  34 +       if (IS_ERR_OR_NULL(ifp)) {
  35 +               brcmf_dbg(INFO, "no matching ifp found\n");
  36                 return -EBADE;
  37         }
  38 -       /* The ifidx is the idx to map to matching netdev/ifp. When receiving
  39 -        * events this is easy because it contains the bssidx which maps
  40 -        * 1-on-1 to the netdev/ifp. But for data frames the ifidx is rcvd.
  41 -        * bssidx 1 is used for p2p0 and no data can be received or
  42 -        * transmitted on it. Therefor bssidx is ifidx + 1 if ifidx > 0
  43 -        */
  44 -       if (*ifidx)
  45 -               (*ifidx)++;
  46 -
  47         if (((h->flags & BCDC_FLAG_VER_MASK) >> BCDC_FLAG_VER_SHIFT) !=
  48             BCDC_PROTO_VER) {
  49                 brcmf_err("%s: non-BCDC packet received, flags 0x%x\n",
  50 -                         brcmf_ifname(drvr, *ifidx), h->flags);
  51 +                         brcmf_ifname(drvr, ifp->ifidx), h->flags);
  52                 return -EBADE;
  53         }
  54
  55         if (h->flags & BCDC_FLAG_SUM_GOOD) {
  56                 brcmf_dbg(BCDC, "%s: BDC rcv, good checksum, flags 0x%x\n",
  57 -                         brcmf_ifname(drvr, *ifidx), h->flags);
  58 +                         brcmf_ifname(drvr, ifp->ifidx), h->flags);
  59                 pktbuf->ip_summed = CHECKSUM_UNNECESSARY;
  60         }
  61
  62 @@ -320,12 +312,15 @@ brcmf_proto_bcdc_hdrpull(struct brcmf_pu
  63
  64         skb_pull(pktbuf, BCDC_HEADER_LEN);
  65         if (do_fws)
  66 -               brcmf_fws_hdrpull(drvr, *ifidx, h->data_offset << 2, pktbuf);
  67 +               brcmf_fws_hdrpull(drvr, ifp->ifidx, h->data_offset << 2,
  68 +                                 pktbuf);
  69         else
  70                 skb_pull(pktbuf, h->data_offset << 2);
  71
  72         if (pktbuf->len == 0)
  73                 return -ENODATA;
  74 +
  75 +       *ifidx = ifp->ifidx;
  76         return 0;
  77  }
  78
  79 --- a/drivers/net/wireless/brcm80211/brcmfmac/core.c
  80 +++ b/drivers/net/wireless/brcm80211/brcmfmac/core.c
  81 @@ -83,6 +83,25 @@ char *brcmf_ifname(struct brcmf_pub *drv
  82         return "<if_none>";
  83  }
  84
  85 +struct brcmf_if *brcmf_get_ifp(struct brcmf_pub *drvr, int ifidx)
  86 +{
  87 +       if (ifidx < 0 || ifidx >= BRCMF_MAX_IFS) {
  88 +               brcmf_err("ifidx %d out of range\n", ifidx);
  89 +               return ERR_PTR(-ERANGE);
  90 +       }
  91 +
  92 +       /* The ifidx is the idx to map to matching netdev/ifp. When receiving
  93 +        * events this is easy because it contains the bssidx which maps
  94 +        * 1-on-1 to the netdev/ifp. But for data frames the ifidx is rcvd.
  95 +        * bssidx 1 is used for p2p0 and no data can be received or
  96 +        * transmitted on it. Therefor bssidx is ifidx + 1 if ifidx > 0
  97 +        */
  98 +       if (ifidx)
  99 +               ifidx++;
 100 +
 101 +       return drvr->iflist[ifidx];
 102 +}
 103 +
 104  static void _brcmf_set_multicast_list(struct work_struct *work)
 105  {
 106         struct brcmf_if *ifp;
 107 --- a/drivers/net/wireless/brcm80211/brcmfmac/core.h
 108 +++ b/drivers/net/wireless/brcm80211/brcmfmac/core.h
 109 @@ -202,7 +202,7 @@ int brcmf_netdev_wait_pend8021x(struct b
 110
 111  /* Return pointer to interface name */
 112  char *brcmf_ifname(struct brcmf_pub *drvr, int idx);
 113 -
 114 +struct brcmf_if *brcmf_get_ifp(struct brcmf_pub *drvr, int ifidx);
 115  int brcmf_net_attach(struct brcmf_if *ifp, bool rtnl_locked);
 116  struct brcmf_if *brcmf_add_if(struct brcmf_pub *drvr, s32 bssidx, s32 ifidx,
 117                               char *name, u8 *mac_addr);
 118 --- a/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
 119 +++ b/drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
 120 @@ -1081,16 +1081,8 @@ brcmf_msgbuf_rx_skb(struct brcmf_msgbuf
 121  {
 122         struct brcmf_if *ifp;
 123
 124 -       /* The ifidx is the idx to map to matching netdev/ifp. When receiving
 125 -        * events this is easy because it contains the bssidx which maps
 126 -        * 1-on-1 to the netdev/ifp. But for data frames the ifidx is rcvd.
 127 -        * bssidx 1 is used for p2p0 and no data can be received or
 128 -        * transmitted on it. Therefor bssidx is ifidx + 1 if ifidx > 0
 129 -        */
 130 -       if (ifidx)
 131 -               (ifidx)++;
 132 -       ifp = msgbuf->drvr->iflist[ifidx];
 133 -       if (!ifp || !ifp->ndev) {
 134 +       ifp = brcmf_get_ifp(msgbuf->drvr, ifidx);
 135 +       if (IS_ERR_OR_NULL(ifp) || !ifp->ndev) {
 136                 brcmf_err("Received pkt for invalid ifidx %d\n", ifidx);
 137                 brcmu_pkt_buf_free_skb(skb);
 138                 return;