package/kernel/mac80211/patches/365-0001-brcmfmac-check-brcmf_bus_get_memdump-result-for-erro.patch

   1 From f4737a62033d7f3e0db740c449fc62119da7ab8a Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
   3 Date: Mon, 30 Jan 2017 16:09:51 +0100
   4 Subject: [PATCH] brcmfmac: check brcmf_bus_get_memdump result for error
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 This method may be unsupported (see: USB bus) or may just fail (see:
  10 SDIO bus).
  11 While at it rework logic in brcmf_sdio_bus_get_memdump function to avoid
  12 too many conditional code nesting levels.
  13
  14 Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  15 Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  16 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  17 ---
  18  .../wireless/broadcom/brcm80211/brcmfmac/debug.c   | 23 +++++++++++++++-------
  19  1 file changed, 16 insertions(+), 7 deletions(-)
  20
  21 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.c
  22 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/debug.c
  23 @@ -32,16 +32,25 @@ static int brcmf_debug_create_memdump(st
  24  {
  25         void *dump;
  26         size_t ramsize;
  27 +       int err;
  28
  29         ramsize = brcmf_bus_get_ramsize(bus);
  30 -       if (ramsize) {
  31 -               dump = vzalloc(len + ramsize);
  32 -               if (!dump)
  33 -                       return -ENOMEM;
  34 -               memcpy(dump, data, len);
  35 -               brcmf_bus_get_memdump(bus, dump + len, ramsize);
  36 -               dev_coredumpv(bus->dev, dump, len + ramsize, GFP_KERNEL);
  37 +       if (!ramsize)
  38 +               return -ENOTSUPP;
  39 +
  40 +       dump = vzalloc(len + ramsize);
  41 +       if (!dump)
  42 +               return -ENOMEM;
  43 +
  44 +       memcpy(dump, data, len);
  45 +       err = brcmf_bus_get_memdump(bus, dump + len, ramsize);
  46 +       if (err) {
  47 +               vfree(dump);
  48 +               return err;
  49         }
  50 +
  51 +       dev_coredumpv(bus->dev, dump, len + ramsize, GFP_KERNEL);
  52 +
  53         return 0;
  54  }
  55