2 files changed, 10 insertions, 3 deletions
diff --git a/os/hal/dox/sdc.dox b/os/hal/dox/sdc.dox
index 2a18977ff..df88796af 100644
--- a/os/hal/dox/sdc.dox
+++ b/os/hal/dox/sdc.dox
@@ -52,9 +52,10 @@
     stop -> stop [label="\nsdcStop()"];
     stop -> ready [label="\nsdcStart()"];
     ready -> stop [label="\nsdcStop()"];
-    ready -> ready [label="\nsdcStart()"];
+    ready -> ready [label="\nsdcStart()\nsdcDisconnect()"];
     ready -> connecting [label="\nsdcConnect()"];
     connecting -> active [label="\nconnection\nsuccessful"];
+    connecting -> active [label="\nsdcConnect()", dir="back"];
     connecting -> ready [label="\nconnection\nfailed"];
     disconnecting -> active [label="\nsdcDisconnect()", dir="back"];
     ready -> disconnecting [label="\ndisconnection\nfinished", dir="back"];
@@ -85,9 +86,10 @@
     stop -> stop [label="\nsdcStop()"];
     stop -> ready [label="\nsdcStart()"];
     ready -> stop [label="\nsdcStop()"];
-    ready -> ready [label="\nsdcStart()"];
+    ready -> ready [label="\nsdcStart()\nsdcDisconnect()"];
     ready -> connecting [label="\nsdcConnect()"];
     connecting -> active [label="\nconnection\nsuccessful"];
+    connecting -> active [label="\nsdcConnect()", dir="back"];
     connecting -> ready [label="\nconnection\nfailed"];
     disconnecting -> active [label="\nsdcDisconnect()", dir="back"];
     ready -> disconnecting [label="\ndisconnection\nfinished", dir="back"];
diff --git a/os/hal/src/sdc.c b/os/hal/src/sdc.c
index a7a39c268..08c667df4 100644
--- a/os/hal/src/sdc.c
+++ b/os/hal/src/sdc.c
@@ -169,7 +169,8 @@ bool_t sdcConnect(SDCDriver *sdcp) {
   chDbgCheck(sdcp != NULL, "sdcConnect");
 
   chSysLock();
-  chDbgAssert(sdcp->state == SDC_READY, "mmcConnect(), #1", "invalid state");
+  chDbgAssert((sdcp->state == SDC_READY) || (sdcp->state == SDC_ACTIVE),
+              "mmcConnect(), #1", "invalid state");
   sdcp->state = SDC_CONNECTING;
   chSysUnlock();
 
@@ -302,6 +303,10 @@ bool_t sdcDisconnect(SDCDriver *sdcp) {
   chSysLock();
   chDbgAssert(sdcp->state == SDC_ACTIVE,
               "sdcDisconnect(), #1", "invalid state");
+  if (sdcp->state == SDC_READY) {
+    chSysUnlock();
+    return FALSE;
+  }
   sdcp->state = SDC_DISCONNECTING;
   chSysUnlock();