From 3349ed266ae22ea9571343b996ffed7fcf500244 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Thu, 7 Nov 2019 14:21:19 +0100 Subject: [PATCH] USB: serial: mos7840: fix remote wakeup commit 92fe35fb9c70a00d8fbbf5bd6172c921dd9c7815 upstream. The driver was setting the device remote-wakeup feature during probe in violation of the USB specification (which says it should only be set just prior to suspending the device). This could potentially waste power during suspend as well as lead to spurious wakeups. Note that USB core would clear the remote-wakeup feature at first resume. Fixes: 3f5429746d91 ("USB: Moschip 7840 USB-Serial Driver") Cc: stable # 2.6.19 Reviewed-by: Greg Kroah-Hartman Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/mos7840.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c index c1c0f6023d96..4a7bd26841af 100644 --- a/drivers/usb/serial/mos7840.c +++ b/drivers/usb/serial/mos7840.c @@ -2325,11 +2325,6 @@ static int mos7840_port_probe(struct usb_serial_port *port) goto error; } else dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status); - - /* setting configuration feature to one */ - usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), - 0x03, 0x00, 0x01, 0x00, NULL, 0x00, - MOS_WDR_TIMEOUT); } return 0; error: -- GitLab