When there is no udc registered bail out in usb_gadget_poll
instead of crashing the system.

Signed-off-by: Sascha Hauer <[email protected]>
---
 drivers/usb/gadget/fsl_udc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/gadget/fsl_udc.c b/drivers/usb/gadget/fsl_udc.c
index 993c7eb..50bae78 100644
--- a/drivers/usb/gadget/fsl_udc.c
+++ b/drivers/usb/gadget/fsl_udc.c
@@ -1938,6 +1938,9 @@ int usb_gadget_poll(void)
        u32 irq_src;
        int status = 0;
 
+       if (!udc)
+               return -ENODEV;
+
        /* Disable ISR for OTG host mode */
        if (udc->stopped)
                return -EIO;
-- 
1.8.5.3


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