From: Vignesh Raghavendra <vigneshr@ti.com>
Date: Fri, 14 Feb 2020 12:22:17 +0000 (+0530)
Subject: misc: k3_avs: Fix possible NULL pointer deference
X-Git-Tag: v2020.04-rc4~33^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a8d03f88efadcfe5963bc72a03fedc9a04f7f5a;p=pandora-u-boot.git

misc: k3_avs: Fix possible NULL pointer deference

Its possible that k3_avs_priv is NULL because the driver may not have
been probed yet. Therefore check if pointer is valid before
dereferencing it.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---

diff --git a/drivers/misc/k3_avs.c b/drivers/misc/k3_avs.c
index 47e42738e04..90df3772505 100644
--- a/drivers/misc/k3_avs.c
+++ b/drivers/misc/k3_avs.c
@@ -191,6 +191,10 @@ int k3_avs_notify_freq(int dev_id, int clk_id, u32 freq)
 	struct k3_avs_privdata *priv = k3_avs_priv;
 	struct vd_data *vd;
 
+	/* Driver may not be probed yet */
+	if (!priv)
+		return -EINVAL;
+
 	for (vd = priv->vd_config->vds; vd->id >= 0; vd++) {
 		if (vd->dev_id != dev_id || vd->clk_id != clk_id)
 			continue;