releases/4.14.60/bluetooth-hci_qca-fix-sleep-inside-atomic-section-warning.patch

   1 From foo@baz Sat Jul 28 10:25:26 CEST 2018
   2 From: Thierry Escande <thierry.escande@linaro.org>
   3 Date: Tue, 29 May 2018 18:37:16 +0200
   4 Subject: Bluetooth: hci_qca: Fix "Sleep inside atomic section" warning
   5
   6 From: Thierry Escande <thierry.escande@linaro.org>
   7
   8 [ Upstream commit 9960521c44a5d828f29636ceac0600603ecbddbf ]
   9
  10 This patch fixes the following warning during boot:
  11
  12  do not call blocking ops when !TASK_RUNNING; state=1 set at
  13  [<(ptrval)>] qca_setup+0x194/0x750 [hci_uart]
  14  WARNING: CPU: 2 PID: 1878 at kernel/sched/core.c:6135
  15  __might_sleep+0x7c/0x88
  16
  17 In qca_set_baudrate(), the current task state is set to
  18 TASK_UNINTERRUPTIBLE before going to sleep for 300ms. It was then
  19 restored to TASK_INTERRUPTIBLE. This patch sets the current task state
  20 back to TASK_RUNNING instead.
  21
  22 Signed-off-by: Thierry Escande <thierry.escande@linaro.org>
  23 Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
  24 Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
  25 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  26 ---
  27  drivers/bluetooth/hci_qca.c |    2 +-
  28  1 file changed, 1 insertion(+), 1 deletion(-)
  29
  30 --- a/drivers/bluetooth/hci_qca.c
  31 +++ b/drivers/bluetooth/hci_qca.c
  32 @@ -881,7 +881,7 @@ static int qca_set_baudrate(struct hci_d
  33          */
  34         set_current_state(TASK_UNINTERRUPTIBLE);
  35         schedule_timeout(msecs_to_jiffies(BAUDRATE_SETTLE_TIMEOUT_MS));
  36 -       set_current_state(TASK_INTERRUPTIBLE);
  37 +       set_current_state(TASK_RUNNING);
  38
  39         return 0;
  40  }