From 77e01d6d177f060f466417fa32fc3e1381a73502 Mon Sep 17 00:00:00 2001
From: Hong Liu <hong.liu@intel.com>
Date: Mon, 26 Jul 2010 10:06:12 +0100
Subject: [PATCH] intel_scu_ipc: return -EIO for error condition in busy_loop

Signed-off-by: Hong Liu <hong.liu@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
---
 drivers/platform/x86/intel_scu_ipc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/intel_scu_ipc.c b/drivers/platform/x86/intel_scu_ipc.c
index 84a2d4bfdec8..23b6d46a4b8f 100644
--- a/drivers/platform/x86/intel_scu_ipc.c
+++ b/drivers/platform/x86/intel_scu_ipc.c
@@ -148,7 +148,10 @@ static inline int busy_loop(void) /* Wait till scu status is busy */
 			return -ETIMEDOUT;
 		}
 	}
-	return (status >> 1) & 1;
+	if ((status >> 1) & 1)
+		return -EIO;
+
+	return 0;
 }
 
 /* Read/Write power control(PMIC in Langwell, MSIC in PenWell) registers */