Fixed errors when device gets disconnected during communication

[lincan.git] / lincan / src / devcommon.c

diff --git a/lincan/src/devcommon.c b/lincan/src/devcommon.c
index 2af0f86e98eecc2e7148b2af9226c40b38b80fdc..bc4157defe2b9438d605eef8e2a9065821a724d5 100644 (file)
--- a/lincan/src/devcommon.c
+++ b/lincan/src/devcommon.c
@@ -36,7 +36,7 @@ void canqueue_wake_chip_worker(struct canque_ends_t *qends, struct canchip_t *ch
 /**
  * canqueue_notify_chip - notification callback handler for CAN chips ends of queues
  * @qends: pointer to the callback side ends structure
- * @qedge: edge which invoked notification 
+ * @qedge: edge which invoked notification
  * @what: notification type
  *
  * This function has to deal with more possible cases. It can be called from
@@ -59,7 +59,10 @@ void canqueue_notify_chip(struct canque_ends_t *qends, struct canque_edge_t *qed
                case CANQUEUE_NOTIFY_PROC:
                    #ifndef CAN_WITH_RTL
                        /*wake_up(&qends->endinfo.chipinfo.daemonq);*/
-                       chip->chipspecops->wakeup_tx(chip, obj);
+                       if(canque_fifo_test_fl(&qedge->fifo, READY)){
+                               if ((chip) && (chip->flags & CHIP_ATTACHED))
+                                       chip->chipspecops->wakeup_tx(chip, obj);
+                       }
                    #else /*CAN_WITH_RTL*/
                        can_msgobj_set_fl(obj,TX_REQUEST);
                        canqueue_wake_chip_worker(qends, chip, obj);
@@ -81,7 +84,7 @@ void canqueue_notify_chip(struct canque_ends_t *qends, struct canque_edge_t *qed
                        can_msgobj_set_fl(obj,FILTCH_REQUEST);
                        canqueue_wake_chip_worker(qends, chip, obj);
                    #endif /*CAN_WITH_RTL*/
-                       
+
                        break;
        }
 }
@@ -98,7 +101,7 @@ int canqueue_ends_init_chip(struct canque_ends_t *qends, struct canchip_t *chip,
        int ret;
        ret=canqueue_ends_init_gen(qends);
        if(ret<0) return ret;
-       
+
        qends->context=NULL;
     #ifndef CAN_WITH_RTL
        init_waitqueue_head(&qends->endinfo.chipinfo.daemonq);
@@ -121,7 +124,7 @@ int canqueue_ends_init_chip(struct canque_ends_t *qends, struct canchip_t *chip,
 int canqueue_ends_done_chip(struct canque_ends_t *qends)
 {
        int delayed;
-       
+
        /* Finish or kill all outgoing edges listed in inends */
        delayed=canqueue_ends_kill_inlist(qends, 1);
        /* Kill all incoming edges listed in outends */