Add an explicit sanity check to make sure we have the expected
endpoints. This will provide a descriptive error message in case an
expected endpoint is missing when probing.
Note that the driver already gracefully fails to probe (albeit with a
less descriptive error message) if a bulk-in endpoint is missing, and an
attempt to write to a port whose device lack a bulk-out endpoint would
fail with -ENODEV.
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
---
drivers/usb/serial/mxuport.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/usb/serial/mxuport.c b/drivers/usb/serial/mxuport.c
index 3355737cbfd1..34142feffd4d 100644
--- a/drivers/usb/serial/mxuport.c
+++ b/drivers/usb/serial/mxuport.c
@@ -1373,6 +1373,8 @@ static struct usb_serial_driver mxuport_device = {
},
.description = "MOXA UPort",
.id_table = mxuport_idtable,
+ .num_bulk_in = 2,
+ .num_bulk_out = 1,
.probe = mxuport_probe,
.port_probe = mxuport_port_probe,
.attach = mxuport_attach,
--
2.12.0
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