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>

1 files changed, 4 insertions, 1 deletions

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 */