package/kernel/mac80211/patches/313-v4.16-0001-brcmfmac-enlarge-buffer-size-of-caps-to-512-bytes.patch

   1 From 7762bb134e3b40e8ee2611365775b7432190a9c7 Mon Sep 17 00:00:00 2001
   2 From: Wright Feng <wright.feng@cypress.com>
   3 Date: Mon, 11 Dec 2017 15:38:21 +0800
   4 Subject: [PATCH] brcmfmac: enlarge buffer size of caps to 512 bytes
   5
   6 The buffer size of return of cap iovar is greater than 256 bytes in some
   7 firmwares. For instance, the return size of cap iovar is 271 bytes in 4373
   8 13.10.246.79 firmare. It makes feature capability parsing failed because
   9 caps buffer is default value.
  10 So we enlarge caps buffer size to 512 bytes and add the error print for
  11 cap iovar error.
  12
  13 Signed-off-by: Wright Feng <wright.feng@cypress.com>
  14 Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  15 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  16 ---
  17  drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c | 12 +++++++++---
  18  1 file changed, 9 insertions(+), 3 deletions(-)
  19
  20 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
  21 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/feature.c
  22 @@ -130,13 +130,19 @@ static void brcmf_feat_iovar_data_set(st
  23         }
  24  }
  25
  26 +#define MAX_CAPS_BUFFER_SIZE   512
  27  static void brcmf_feat_firmware_capabilities(struct brcmf_if *ifp)
  28  {
  29 -       char caps[256];
  30 +       char caps[MAX_CAPS_BUFFER_SIZE];
  31         enum brcmf_feat_id id;
  32 -       int i;
  33 +       int i, err;
  34 +
  35 +       err = brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
  36 +       if (err) {
  37 +               brcmf_err("could not get firmware cap (%d)\n", err);
  38 +               return;
  39 +       }
  40
  41 -       brcmf_fil_iovar_data_get(ifp, "cap", caps, sizeof(caps));
  42         brcmf_dbg(INFO, "[ %s]\n", caps);
  43
  44         for (i = 0; i < ARRAY_SIZE(brcmf_fwcap_map); i++) {