The .stop and .unbind callbacks of struct driver_info are
called even after a DETACH hot-plug event. In the case of
the ax88179_178a minidriver we need to make sure we are not
trying to send commands to a device that has been detached.
This leads to failure messages like below.
ax88179_178a 1-1.3:1.0 (unregistered net_device):
Failed to write reg index 0x0001: -19
Signed-off-by: Emil Goode <emilgoode@xxxxxxxxx>
---
drivers/net/usb/ax88179_178a.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c
index 054e59c..fe20ca8 100644
--- a/drivers/net/usb/ax88179_178a.c
+++ b/drivers/net/usb/ax88179_178a.c
@@ -1074,6 +1074,9 @@ static void ax88179_unbind(struct usbnet *dev, struct usb_interface *intf)
{
u16 tmp16;
+ if (dev->udev->state == USB_STATE_NOTATTACHED)
+ return;
+
/* Configure RX control register => stop operation */
tmp16 = AX_RX_CTL_STOP;
ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, &tmp16);
@@ -1352,6 +1355,9 @@ static int ax88179_stop(struct usbnet *dev)
{
u16 tmp16;
+ if (dev->udev->state == USB_STATE_NOTATTACHED)
+ return 0;
+
ax88179_read_cmd(dev, AX_ACCESS_MAC, AX_MEDIUM_STATUS_MODE,
2, 2, &tmp16);
tmp16 &= ~AX_MEDIUM_RECEIVE_EN;
--
1.7.10.4
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