staging: unisys: visorbus: my_device_changestate add error handling

The function my_device_changestate was not returning errors up the stack.

Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: David Binder <david.binder@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/unisys/visorbus/visorchipset.c b/drivers/staging/unisys/visorbus/visorchipset.c
index 6343cb029b6ee0318aa74ca6192104dd7ffa408c..18f60f0c13ba39ce76b2f36430e883cc2389ec1a 100644 (file)
--- a/drivers/staging/unisys/visorbus/visorchipset.c
+++ b/drivers/staging/unisys/visorbus/visorchipset.c
@@ -983,7 +983,7 @@ err_respond:
        return err;
 }
 
-static void
+static int
 my_device_changestate(struct controlvm_message *inmsg)
 {
        struct controlvm_message_packet *cmd = &inmsg->cmd;
@@ -992,30 +992,30 @@ my_device_changestate(struct controlvm_message *inmsg)
        u32 dev_no = cmd->device_change_state.dev_no;
        struct spar_segment_state state = cmd->device_change_state.state;
        struct visor_device *dev_info;
-       int rc = CONTROLVM_RESP_SUCCESS;
+       int err;
 
        dev_info = visorbus_get_device_by_id(bus_no, dev_no, NULL);
        if (!dev_info) {
                POSTCODE_LINUX(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no,
                               DIAG_SEVERITY_ERR);
-               rc = -CONTROLVM_RESP_DEVICE_INVALID;
+               err = -ENODEV;
                goto err_respond;
        }
        if (dev_info->state.created == 0) {
                POSTCODE_LINUX(DEVICE_CHANGESTATE_FAILURE_PC, dev_no, bus_no,
                               DIAG_SEVERITY_ERR);
-               rc = -CONTROLVM_RESP_DEVICE_INVALID;
+               err = -EINVAL;
                goto err_respond;
        }
        if (dev_info->pending_msg_hdr) {
                /* only non-NULL if dev is still waiting on a response */
-               rc = -CONTROLVM_RESP_ID_INVALID_FOR_CLIENT;
+               err = -EIO;
                goto err_respond;
        }
        if (inmsg->hdr.flags.response_expected == 1) {
                pmsg_hdr = kzalloc(sizeof(*pmsg_hdr), GFP_KERNEL);
                if (!pmsg_hdr) {
-                       rc = -CONTROLVM_RESP_KMALLOC_FAILED;
+                       err = -ENOMEM;
                        goto err_respond;
                }
 
@@ -1036,12 +1036,12 @@ my_device_changestate(struct controlvm_message *inmsg)
                 * Response will be sent from chipset_device_pause.
                 */
                chipset_device_pause(dev_info);
-
-       return;
+       return 0;
 
 err_respond:
        if (inmsg->hdr.flags.response_expected == 1)
-               device_responder(inmsg->hdr.id, &inmsg->hdr, rc);
+               device_responder(inmsg->hdr.id, &inmsg->hdr, err);
+       return err;
 }
 
 static void