From: Felipe Balbi <felipe.balbi@xxxxxxxxx>
usb: musb: do not work if no gadget driver is loaded
On OTG and gadget-only configurations, we need a gadget driver
in order to work properly, so avoid changing operation modes
when there's no gadget driver loaded.
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxx>
Cc: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
Acked-by: Anand Gadiyar <gadiyar@xxxxxx>
---
drivers/usb/musb/musb_core.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 4336856..19d6185 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1521,6 +1521,12 @@ irqreturn_t musb_interrupt(struct musb *musb)
(devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral",
musb->int_usb, musb->int_tx, musb->int_rx);
+ if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
+ if (!musb->gadget_driver) {
+ DBG(5, "No gadget driver loaded\n");
+ return IRQ_HANDLED;
+ }
+
/* the core can interrupt us for multiple reasons; docs have
* a generic interrupt flowchart to follow
*/
--
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