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path: root/drivers/usb/gadget/file_storage.c
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Diffstat (limited to 'drivers/usb/gadget/file_storage.c')
-rw-r--r--drivers/usb/gadget/file_storage.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 66105ce49672..8b0a13202573 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -728,6 +728,7 @@ struct fsg_dev {
#include "fsl_updater.h"
#endif
+static int do_set_interface(struct fsg_dev *fsg, int altsetting);
typedef void (*fsg_routine_t)(struct fsg_dev *);
static int exception_in_progress(struct fsg_dev *fsg)
@@ -1108,6 +1109,14 @@ static void fsg_disconnect(struct usb_gadget *gadget)
struct fsg_dev *fsg = get_gadget_data(gadget);
DBG(fsg, "disconnect or port reset\n");
+ /*
+ * The disconnect exception will call do_set_config, and therefore will
+ * visit controller registers. However it is a delayed event, and will be
+ * handled at another process, so the controller maybe have already close the
+ * usb clock.*/
+ if (fsg->new_config)
+ do_set_interface(fsg, -1);/* disable the interface */
+
raise_exception(fsg, FSG_STATE_DISCONNECT);
}