| Message ID | 20201111131209.3977903-1-chris.brandt@renesas.com |
|---|---|
| State | New |
| Headers | show |
| Series | usb: cdc-acm: Add DISABLE_ECHO for Renesas USB Download mode | expand |
Am Mittwoch, den 11.11.2020, 08:12 -0500 schrieb Chris Brandt: > Renesas R-Car and RZ/G SoCs have a firmware download mode over USB. > However, on reset a banner string is transmitted out which is not expected > to be echoed back and will corrupt the protocol. > > Signed-off-by: Chris Brandt <chris.brandt@renesas.com> > Cc: stable <stable@vger.kernel.org> Acked-by: Oliver Neukum <oneukum@suse.com>
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 1e7568867910..f52f1bc0559f 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1693,6 +1693,15 @@ static const struct usb_device_id acm_ids[] = { { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ }, + { USB_DEVICE(0x045b, 0x023c), /* Renesas USB Download mode */ + .driver_info = DISABLE_ECHO, /* Don't echo banner */ + }, + { USB_DEVICE(0x045b, 0x0248), /* Renesas USB Download mode */ + .driver_info = DISABLE_ECHO, /* Don't echo banner */ + }, + { USB_DEVICE(0x045b, 0x024D), /* Renesas USB Download mode */ + .driver_info = DISABLE_ECHO, /* Don't echo banner */ + }, { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ },
Renesas R-Car and RZ/G SoCs have a firmware download mode over USB. However, on reset a banner string is transmitted out which is not expected to be echoed back and will corrupt the protocol. Signed-off-by: Chris Brandt <chris.brandt@renesas.com> Cc: stable <stable@vger.kernel.org> --- drivers/usb/class/cdc-acm.c | 9 +++++++++ 1 file changed, 9 insertions(+)