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USB: serial: mxuport: add endpoint sanity check

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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@kernel.org>
This commit is contained in:
Johan Hovold 2017-03-16 17:13:55 +01:00
parent bc4c2c15cb
commit 6b0464c9d7
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/serial/mxuport.c
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@ -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,