From f2ddf340940c989c0218d988f6eda3c0816df098 Mon Sep 17 00:00:00 2001
From: Stephen Dickey <dickey@codeaurora.org>
Date: Wed, 6 May 2020 11:16:50 -0700
Subject: [PATCH] devfreq: memlat: correct null pointer derference

alloc_attr() might return NULL on memory allocation
failure which would lead to NULL pointer
de-reference, fix it by adding NULL check.

Change-Id: Iec7fee76a29c85355142a8bb475e2416807debd5
Signed-off-by: Stephen Dickey <dickey@codeaurora.org>
---
 drivers/devfreq/arm-memlat-mon.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/devfreq/arm-memlat-mon.c b/drivers/devfreq/arm-memlat-mon.c
index 2b4598ba0f0f..c5ba138e9490 100644
--- a/drivers/devfreq/arm-memlat-mon.c
+++ b/drivers/devfreq/arm-memlat-mon.c
@@ -366,6 +366,9 @@ static int memlat_hp_restart_events(unsigned int cpu, bool cpu_up)
 	unsigned int idx;
 	struct event_data *common_evs;
 
+	if (!attr)
+		return -ENOMEM;
+
 	if (!cpu_grp)
 		goto exit;