From: Fabio Estevam <festevam@gmail.com>
Date: Mon, 22 Jan 2018 11:20:26 +0000 (+0100)
Subject: ARM: 8746/1: vfp: Go back to clearing vfp_current_hw_state[]
X-Git-Tag: v4.9.93~102
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=da789f7d683cbce7da4c008c62668cd5912f2dec;p=platform%2Fkernel%2Flinux-amlogic.git

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

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>
---

diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index da0b33d..5629d75 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -648,7 +648,7 @@ int vfp_restore_user_hwstate(struct user_vfp __user *ufp,
  */
 static int vfp_dying_cpu(unsigned int cpu)
 {
-	vfp_force_reload(cpu, current_thread_info());
+	vfp_current_hw_state[cpu] = NULL;
 	return 0;
 }