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 7f53597e697a95063f74a275e96288a09595ce29..7646569922fe9118ebcaff314a803c94d05aa847 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 3f8901a503a6041f0218b445277fd81b905c4b24..c262d0bd5bd5e23c64d694df37d4b00096eeb679 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,
 };
 
 /*