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USB: serial: mos7720: fix remote wakeup

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commit ea422312a462696093b5db59d294439796cba4ad 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: 0f64478cbc ("USB: add USB serial mos7720 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 14:21:18 +01:00
committed by Greg Kroah-Hartman
parent 4f55d2480a
commit bbad873cde
1 changed files with 0 additions and 4 deletions
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4
drivers/usb/serial/mos7720.c
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@@ -1905,10 +1905,6 @@ static int mos7720_startup(struct usb_serial *serial)
product = le16_to_cpu(serial->dev->descriptor.idProduct);
dev = serial->dev;
/* setting configuration feature to one */
usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
(__u8)0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5000);
if (product == MOSCHIP_DEVICE_ID_7715) {
struct urb *urb = serial->port[0]->interrupt_in_urb;