From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Lei Subject: [PATCH 12/12] usbnet: make device out of suspend before calling usbnet_read/write_cmd Date: Tue, 2 Oct 2012 14:51:23 +0800 Message-ID: <1349160684-6627-13-git-send-email-ming.lei@canonical.com> References: <1349160684-6627-1-git-send-email-ming.lei@canonical.com> Cc: Oliver Neukum , netdev@vger.kernel.org, linux-usb@vger.kernel.org, Ming Lei To: "David S. Miller" , Greg Kroah-Hartman Return-path: Received: from mail-pa0-f46.google.com ([209.85.220.46]:39032 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754397Ab2JBGw7 (ORCPT ); Tue, 2 Oct 2012 02:52:59 -0400 In-Reply-To: <1349160684-6627-1-git-send-email-ming.lei@canonical.com> Sender: netdev-owner@vger.kernel.org List-ID: This patche gets the runtime PM reference count before calling usb_control_msg, and puts it after completion of the usb_control_msg, so that the usb control message can always be sent to one active device. Signed-off-by: Ming Lei --- drivers/net/usb/usbnet.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index 3b51554..3f4bc69 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1609,9 +1609,11 @@ int usbnet_read_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, goto out; } + usb_autopm_get_interface(dev->intf); err = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), cmd, reqtype, value, index, buf, size, USB_CTRL_GET_TIMEOUT); + usb_autopm_put_interface(dev->intf); if (err > 0 && err <= size) memcpy(data, buf, err); kfree(buf); @@ -1636,9 +1638,11 @@ int usbnet_write_cmd(struct usbnet *dev, u8 cmd, u8 reqtype, goto out; } + usb_autopm_get_interface(dev->intf); err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), cmd, reqtype, value, index, buf, size, USB_CTRL_SET_TIMEOUT); + usb_autopm_put_interface(dev->intf); kfree(buf); out: -- 1.7.9.5