target/linux/brcm2708/patches-4.1/0080-Fix-driver-detection-failure-Check-that-the-buffer-r.patch


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From 94b88ebdb90e6b3ae6eca18355a2ff318041318f Mon Sep 17 00:00:00 2001
From: Gordon Hollingworth <gordon@fiveninjas.com>
Date: Tue, 23 Jun 2015 09:53:40 +0100
Subject: [PATCH 080/148] Fix driver detection failure Check that the buffer
 response is non-zero meaning the touchscreen was detected

---
 drivers/input/touchscreen/rpi-ft5406.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/input/touchscreen/rpi-ft5406.c
+++ b/drivers/input/touchscreen/rpi-ft5406.c
@@ -184,7 +184,7 @@ static int ft5406_probe(struct platform_
 	
 	bcm_mailbox_property(&request, sizeof(request));
 	
-	if(request.request_code == VCMSG_REQUEST_SUCCESSFUL)
+	if(request.request_code == VCMSG_REQUEST_SUCCESSFUL && request.tag.val != 0)
 	{
 		dev_dbg(&pdev->dev, "Got TS buffer 0x%x\n", request.tag.val);
 	}