disp: msm: dp: Fix incorrect NULL pointer check

Fix a typo where the correct pointer was not
being checked for NULL.

CRs-Fixed: 2511681
Change-Id: I1dde2914a7fca1f585fc7f51d8a8579fd9db2558
Signed-off-by: Fuad Hossain <fhossain@codeaurora.org>

msm/dp/dp_audio.c

@@ -377,7 +377,7 @@ static struct dp_audio_private *dp_audio_get_data(struct platform_device *pdev)
 	}
 
 	dp_audio = ext_data->intf_data;
-	if (!ext_data) {
+	if (!dp_audio) {
 		DP_ERR("invalid intf data\n");
 		return ERR_PTR(-EINVAL);
 	}
@@ -424,6 +424,11 @@ static int dp_audio_get_edid_blk(struct platform_device *pdev,
 	struct dp_audio_private *audio;
 	struct sde_edid_ctrl *edid;
 
+	if (!blk) {
+		DP_ERR("invalid input\n");
+		return -EINVAL;
+	}
+
 	audio = dp_audio_get_data(pdev);
 	if (IS_ERR(audio)) {
 		rc = PTR_ERR(audio);