usb: musb: only remove host/udc if it has been added

musb_shutdown() removes always USB host and device.
musb_init_controller() adds host and device depending on port_mode. If
port mode is set to HOST then the removal of UDC leads only to:
|(NULL device *): gadget not registered.
and nothing else happens. If port mode is set to DEVICE and we remove
the host then we oops in usb_remove_hcd().
This patch ensures that we only remove host in OTG/host mode and device
only in OTG/device mode to avoid any trouble.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

2 files changed, 4 insertions, 0 deletions

diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index b7b8b2bc4ee9..9a08679d204d 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1812,6 +1812,8 @@ err:
 
 void musb_gadget_cleanup(struct musb *musb)
 {
+        if (musb->port_mode == MUSB_PORT_MODE_HOST)
+                return;
         usb_del_gadget_udc(&musb->g);
 }
 
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index a9695f5a92fb..9a2b8c85f19a 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -2628,6 +2628,8 @@ int musb_host_alloc(struct musb *musb)
 
 void musb_host_cleanup(struct musb *musb)
 {
+        if (musb->port_mode == MUSB_PORT_MODE_GADGET)
+                return;
         usb_remove_hcd(musb->hcd);
         musb->hcd = NULL;
 }