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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2017-01-20 09:36:44 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2017-03-09 09:36:58 +0100 |
| commit | 25fd64ed22b56b875c3f8d8bffd737a38084cf96 (patch) | |
| tree | 1b54392f66fe781f138628516e96fc9f00da734d /drivers | |
| parent | 400988a8315b147c5a3d03c9e3578c847b3fd225 (diff) | |
| download | barebox-25fd64ed22b56b875c3f8d8bffd737a38084cf96.tar.gz barebox-25fd64ed22b56b875c3f8d8bffd737a38084cf96.tar.xz | |
usb: gadget: print a meaningful error message
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@pengutronix.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/gadget/multi.c | 5 |
1 files changed, 5 insertions, 0 deletions
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); |