From: Vinod Koul <vinod.koul@intel.com>
Date: Thu, 12 May 2016 04:08:49 +0000 (+0530)
Subject: ASoC: rt298: fix null deref on acpi driver data
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bb7cb54b388d8d0fbb3af27f14b121ee9c92e867;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

ASoC: rt298: fix null deref on acpi driver data

ACPI driver data can be NULL so we need to check that before
dereference the driver data.

Signed-off-by: Senthilnathan Veppur <senthilnathanx.veppur@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Acked-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---

diff --git a/sound/soc/codecs/rt298.c b/sound/soc/codecs/rt298.c
index f0e6c06e89ac..52aacb1d5e4c 100644
--- a/sound/soc/codecs/rt298.c
+++ b/sound/soc/codecs/rt298.c
@@ -1184,7 +1184,7 @@ static int rt298_i2c_probe(struct i2c_client *i2c,
 
 	/* enable jack combo mode on supported devices */
 	acpiid = acpi_match_device(dev->driver->acpi_match_table, dev);
-	if (acpiid) {
+	if (acpiid && acpiid->driver_data) {
 		rt298->pdata = *(struct rt298_platform_data *)
 				acpiid->driver_data;
 	}