Patch "ARM: 8746/1: vfp: Go back to clearing vfp_current_hw_state[]" has been added to the 4.9-stable tree

Patch "ARM: 8746/1: vfp: Go back to clearing vfp_current_hw_state[]" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ARM: 8746/1: vfp: Go back to clearing vfp_current_hw_state[]

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm-8746-1-vfp-go-back-to-clearing-vfp_current_hw_state.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 1328f02005bbbaed15b9d5b7f3ab5ec9d4d5268a Mon Sep 17 00:00:00 2001
From: Fabio Estevam <festevam@gmail.com>
Date: Mon, 22 Jan 2018 12:20:26 +0100
Subject: ARM: 8746/1: vfp: Go back to clearing vfp_current_hw_state[]

From: Fabio Estevam <festevam@gmail.com>

commit 1328f02005bbbaed15b9d5b7f3ab5ec9d4d5268a upstream.

Commit 384b38b66947 ("ARM: 7873/1: vfp: clear vfp_current_hw_state
for dying cpu") fixed the cpu dying notifier by clearing
vfp_current_hw_state[]. However commit e5b61bafe704 ("arm: Convert VFP
hotplug notifiers to state machine") incorrectly used the original
vfp_force_reload() function in the cpu dying notifier.

Fix it by going back to clearing vfp_current_hw_state[].

Fixes: e5b61bafe704 ("arm: Convert VFP hotplug notifiers to state machine")
Cc: linux-stable <stable@vger.kernel.org>
Reported-by: Kohji Okuno <okuno.kohji@jp.panasonic.com>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm/vfp/vfpmodule.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -648,7 +648,7 @@ int vfp_restore_user_hwstate(struct user
  */
 static int vfp_dying_cpu(unsigned int cpu)
 {
-	vfp_force_reload(cpu, current_thread_info());
+	vfp_current_hw_state[cpu] = NULL;
 	return 0;
 }
 


Patches currently in stable-queue which might be from festevam@gmail.com are

queue-4.9/arm-8746-1-vfp-go-back-to-clearing-vfp_current_hw_state.patch