| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.9 201/255] usb: cdc-acm: Add DISABLE_ECHO for Renesas USB Download mode | Date | Tue, 17 Nov 2020 14:05:41 +0100 |
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From: Chris Brandt <chris.brandt@renesas.com>
commit 6d853c9e4104b4fc8d55dc9cd3b99712aa347174 upstream.
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.
Cc: stable <stable@vger.kernel.org> Acked-by: Oliver Neukum <oneukum@suse.com> Signed-off-by: Chris Brandt <chris.brandt@renesas.com> Link: https://lore.kernel.org/r/20201111131209.3977903-1-chris.brandt@renesas.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/class/cdc-acm.c | 9 +++++++++ 1 file changed, 9 insertions(+)
--- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1706,6 +1706,15 @@ static const struct usb_device_id acm_id { 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 */ },
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