[PATCH 12/12] usbnet: make device out of suspend before calling usbnet_read/write_cmd

[Ming Lei]

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 <ming....@canonical.com>
---
 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

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