4.9-stable review patch. If anyone has any objections, please let me know.
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From: Frieder Schrempf frieder.schrempf@kontron.de
[ Upstream commit 7b900ead6cc66b2ee873cb042dfba169aa68b56c ]
We need to make sure, that the carrier check polling is disabled while suspending. Otherwise we can end up with usbnet_read_cmd() being issued when only usbnet_read_cmd_nopm() is allowed. If this happens, read operations lock up.
Fixes: d69d169493 ("usbnet: smsc95xx: fix link detection for disabled autonegotiation") Signed-off-by: Frieder Schrempf frieder.schrempf@kontron.de Reviewed-by: Raghuram Chary J RaghuramChary.Jallipalli@microchip.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/usb/smsc95xx.c | 7 +++++++ 1 file changed, 7 insertions(+)
--- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -1590,6 +1590,8 @@ static int smsc95xx_suspend(struct usb_i return ret; }
+ cancel_delayed_work_sync(&pdata->carrier_check); + if (pdata->suspend_flags) { netdev_warn(dev->net, "error during last resume\n"); pdata->suspend_flags = 0; @@ -1832,6 +1834,11 @@ done: */ if (ret && PMSG_IS_AUTO(message)) usbnet_resume(intf); + + if (ret) + schedule_delayed_work(&pdata->carrier_check, + CARRIER_CHECK_DELAY); + return ret; }