mei: hbm: add new error code MEI_CL_CONN_NOT_ALLOWED

The device can return error 5 (NOT_ALLOWED) on connection attempt.
This error can happen if:
1. An another connection attempt is in progress
2. There is an attempt to connect a fixed (connectionless) client
3. The number of available connections is exceeded (new in HBM 2.0)

We should not hit that error unless there is an internal book keeping
hiccup except option (3), therefore we translate the error code
to errno EBUSY;

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index 7f53597..7646569 100644 (file)
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -52,6 +52,7 @@ static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status)
        MEI_CL_CS(ALREADY_STARTED);
        MEI_CL_CS(OUT_OF_RESOURCES);
        MEI_CL_CS(MESSAGE_SMALL);
+       MEI_CL_CS(NOT_ALLOWED);
        default: return "unknown";
        }
 #undef MEI_CL_CCS
@@ -89,6 +90,7 @@ static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status)
        case MEI_CL_CONN_ALREADY_STARTED:  return -EBUSY;
        case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY;
        case MEI_CL_CONN_MESSAGE_SMALL:    return -EINVAL;
+       case MEI_CL_CONN_NOT_ALLOWED:      return -EBUSY;
        default:                           return -EINVAL;
        }
 }

diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index 3f8901a..c262d0b 100644 (file)
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -161,6 +161,7 @@ enum mei_cl_connect_status {
        MEI_CL_CONN_ALREADY_STARTED  = MEI_HBMS_ALREADY_EXISTS,
        MEI_CL_CONN_OUT_OF_RESOURCES = MEI_HBMS_REJECTED,
        MEI_CL_CONN_MESSAGE_SMALL    = MEI_HBMS_INVALID_PARAMETER,
+       MEI_CL_CONN_NOT_ALLOWED      = MEI_HBMS_NOT_ALLOWED,
 };
 
 /*