We can only register one USB multi gadget, so check for it being
already registered and print a meaningful error message if it is.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
drivers/usb/gadget/multi.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/gadget/multi.c b/drivers/usb/gadget/multi.c
index 13fa622f01..a2cfc8d850 100644
--- a/drivers/usb/gadget/multi.c
+++ b/drivers/usb/gadget/multi.c
@@ -234,6 +234,11 @@ static struct usb_composite_driver multi_driver = {
int usb_multi_register(struct f_multi_opts *opts)
{
+ if (gadget_multi_opts) {
+ pr_err("USB multi gadget already registered\n");
+ return -EBUSY;
+ }
+
gadget_multi_opts = opts;
return usb_composite_probe(&multi_driver);
--
2.11.0
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