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path: root/drivers/hv/hv_util.c
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Diffstat (limited to 'drivers/hv/hv_util.c')
-rw-r--r--drivers/hv/hv_util.c46
1 files changed, 33 insertions, 13 deletions
diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
index a0667de7a04c..1d4cbd8e8261 100644
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -49,6 +49,16 @@ static struct hv_util_service util_kvp = {
.util_deinit = hv_kvp_deinit,
};
+static void perform_shutdown(struct work_struct *dummy)
+{
+ orderly_poweroff(true);
+}
+
+/*
+ * Perform the shutdown operation in a thread context.
+ */
+static DECLARE_WORK(shutdown_work, perform_shutdown);
+
static void shutdown_onchannelcallback(void *context)
{
struct vmbus_channel *channel = context;
@@ -106,7 +116,7 @@ static void shutdown_onchannelcallback(void *context)
}
if (execute_shutdown == true)
- orderly_poweroff(true);
+ schedule_work(&shutdown_work);
}
/*
@@ -274,6 +284,16 @@ static int util_probe(struct hv_device *dev,
}
}
+ /*
+ * The set of services managed by the util driver are not performance
+ * critical and do not need batched reading. Furthermore, some services
+ * such as KVP can only handle one message from the host at a time.
+ * Turn off batched reading for all util drivers before we open the
+ * channel.
+ */
+
+ set_channel_read_state(dev->channel, false);
+
ret = vmbus_open(dev->channel, 4 * PAGE_SIZE, 4 * PAGE_SIZE, NULL, 0,
srv->util_cb, dev->channel);
if (ret)
@@ -304,21 +324,21 @@ static int util_remove(struct hv_device *dev)
static const struct hv_vmbus_device_id id_table[] = {
/* Shutdown guid */
- { VMBUS_DEVICE(0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
- 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB)
- .driver_data = (unsigned long)&util_shutdown },
+ { HV_SHUTDOWN_GUID,
+ .driver_data = (unsigned long)&util_shutdown
+ },
/* Time synch guid */
- { VMBUS_DEVICE(0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49,
- 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf)
- .driver_data = (unsigned long)&util_timesynch },
+ { HV_TS_GUID,
+ .driver_data = (unsigned long)&util_timesynch
+ },
/* Heartbeat guid */
- { VMBUS_DEVICE(0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
- 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d)
- .driver_data = (unsigned long)&util_heartbeat },
+ { HV_HEART_BEAT_GUID,
+ .driver_data = (unsigned long)&util_heartbeat
+ },
/* KVP guid */
- { VMBUS_DEVICE(0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d,
- 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6)
- .driver_data = (unsigned long)&util_kvp },
+ { HV_KVP_GUID,
+ .driver_data = (unsigned long)&util_kvp
+ },
{ },
};