releases/4.14.33/arm-8746-1-vfp-go-back-to-clearing-vfp_current_hw_state.patch

   1 From 1328f02005bbbaed15b9d5b7f3ab5ec9d4d5268a Mon Sep 17 00:00:00 2001
   2 From: Fabio Estevam <festevam@gmail.com>
   3 Date: Mon, 22 Jan 2018 12:20:26 +0100
   4 Subject: ARM: 8746/1: vfp: Go back to clearing vfp_current_hw_state[]
   5
   6 From: Fabio Estevam <festevam@gmail.com>
   7
   8 commit 1328f02005bbbaed15b9d5b7f3ab5ec9d4d5268a upstream.
   9
  10 Commit 384b38b66947 ("ARM: 7873/1: vfp: clear vfp_current_hw_state
  11 for dying cpu") fixed the cpu dying notifier by clearing
  12 vfp_current_hw_state[]. However commit e5b61bafe704 ("arm: Convert VFP
  13 hotplug notifiers to state machine") incorrectly used the original
  14 vfp_force_reload() function in the cpu dying notifier.
  15
  16 Fix it by going back to clearing vfp_current_hw_state[].
  17
  18 Fixes: e5b61bafe704 ("arm: Convert VFP hotplug notifiers to state machine")
  19 Cc: linux-stable <stable@vger.kernel.org>
  20 Reported-by: Kohji Okuno <okuno.kohji@jp.panasonic.com>
  21 Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
  22 Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
  23 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  24
  25 ---
  26  arch/arm/vfp/vfpmodule.c |    2 +-
  27  1 file changed, 1 insertion(+), 1 deletion(-)
  28
  29 --- a/arch/arm/vfp/vfpmodule.c
  30 +++ b/arch/arm/vfp/vfpmodule.c
  31 @@ -648,7 +648,7 @@ int vfp_restore_user_hwstate(struct user
  32   */
  33  static int vfp_dying_cpu(unsigned int cpu)
  34  {
  35 -       vfp_force_reload(cpu, current_thread_info());
  36 +       vfp_current_hw_state[cpu] = NULL;
  37         return 0;
  38  }
  39