From: Oliver Neukum oneukum@suse.com

commit e4c77070ad45fc940af1d7fb1e637c349e848951 upstream.

This failure is so common that logging an error here amounts to spamming log files.

Reviewed-by: Bruno Thomsen bruno.thomsen@gmail.com Signed-off-by: Oliver Neukum oneukum@suse.com Cc: stable stable@vger.kernel.org Link: https://lore.kernel.org/r/20210311130126.15972-2-oneukum@suse.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/class/cdc-acm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 64dd96436f59d..c3c7852dd04c2 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -664,7 +664,8 @@ static void acm_port_dtr_rts(struct tty_port *port, int raise)

res = acm_set_control(acm, val); if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) - dev_err(&acm->control->dev, "failed to set dtr/rts\n"); + /* This is broken in too many devices to spam the logs */ + dev_dbg(&acm->control->dev, "failed to set dtr/rts\n"); }

static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)