From 5a66fecbf6aa528e375cbebccb1061cc58d80c84 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Thu, 22 Dec 2016 16:54:01 -0800 Subject: Drivers: hv: util: kvp: Fix a rescind processing issue KVP may use a char device to support the communication between the user level daemon and the driver. When the KVP channel is rescinded we need to make sure that the char device is fully cleaned up before we can process a new KVP offer from the host. Implement this logic. Signed-off-by: K. Y. Srinivasan Cc: Signed-off-by: Greg Kroah-Hartman --- drivers/hv/hv_kvp.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/hv') diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c index 5e1fdc8d32ab..3abfc5983c97 100644 --- a/drivers/hv/hv_kvp.c +++ b/drivers/hv/hv_kvp.c @@ -88,6 +88,7 @@ static DECLARE_WORK(kvp_sendkey_work, kvp_send_key); static const char kvp_devname[] = "vmbus/hv_kvp"; static u8 *recv_buffer; static struct hvutil_transport *hvt; +static struct completion release_event; /* * Register the kernel component with the user-level daemon. * As part of this registration, pass the LIC version number. @@ -716,6 +717,7 @@ static void kvp_on_reset(void) if (cancel_delayed_work_sync(&kvp_timeout_work)) kvp_respond_to_host(NULL, HV_E_FAIL); kvp_transaction.state = HVUTIL_DEVICE_INIT; + complete(&release_event); } int @@ -724,6 +726,7 @@ hv_kvp_init(struct hv_util_service *srv) recv_buffer = srv->recv_buffer; kvp_transaction.recv_channel = srv->channel; + init_completion(&release_event); /* * When this driver loads, the user level daemon that * processes the host requests may not yet be running. @@ -747,4 +750,5 @@ void hv_kvp_deinit(void) cancel_delayed_work_sync(&kvp_timeout_work); cancel_work_sync(&kvp_sendkey_work); hvutil_transport_destroy(hvt); + wait_for_completion(&release_event); } -- cgit v1.2.3-59-g8ed1b