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USB: serial: mos7840: fix remote wakeup

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commit 92fe35fb9c 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: 3f5429746d ("USB: Moschip 7840 USB-Serial Driver")
Cc: stable <stable@vger.kernel.org>     # 2.6.19
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2019-11-07 14:21:19 +01:00 committed by Greg Kroah-Hartman
parent abbda35d6a
commit 3349ed266a
1 changed files with 0 additions and 5 deletions
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5
drivers/usb/serial/mos7840.c
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@ -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: