target/linux/bcm27xx/patches-5.4/950-0084-hci_h5-Don-t-send-conf_req-when-ACTIVE.patch

   1 From 34cb3c9d88a81018a291d3ed37f081d5cc41d00e Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Thu, 17 Dec 2015 13:37:07 +0000
   4 Subject: [PATCH] hci_h5: Don't send conf_req when ACTIVE
   5
   6 Without this patch, a modem and kernel can continuously bombard each
   7 other with conf_req and conf_rsp messages, in a demented game of tag.
   8 ---
   9  drivers/bluetooth/hci_h5.c | 3 ++-
  10  1 file changed, 2 insertions(+), 1 deletion(-)
  11
  12 --- a/drivers/bluetooth/hci_h5.c
  13 +++ b/drivers/bluetooth/hci_h5.c
  14 @@ -342,7 +342,8 @@ static void h5_handle_internal_rx(struct
  15                 h5_link_control(hu, conf_req, 3);
  16         } else if (memcmp(data, conf_req, 2) == 0) {
  17                 h5_link_control(hu, conf_rsp, 2);
  18 -               h5_link_control(hu, conf_req, 3);
  19 +               if (h5->state != H5_ACTIVE)
  20 +                   h5_link_control(hu, conf_req, 3);
  21         } else if (memcmp(data, conf_rsp, 2) == 0) {
  22                 if (H5_HDR_LEN(hdr) > 2)
  23                         h5->tx_win = (data[2] & 0x07);