From 622a50dce08bd817d2f10c1bcf806ccb35643653 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Thu, 29 Sep 2011 11:54:47 -0700 Subject: [PATCH] Staging: hv: mousevsc: Use completion primitive to synchronize Use completion primitive to synchronize. Signed-off-by: K. Y. Srinivasan Signed-off-by: Haiyang Zhang Signed-off-by: Greg Kroah-Hartman --- drivers/staging/hv/hv_mouse.c | 30 ++++++++++-------------------- 1 file changed, 10 insertions(+), 20 deletions(-) diff --git a/drivers/staging/hv/hv_mouse.c b/drivers/staging/hv/hv_mouse.c index 74faa2678485..ea9e1f30c144 100644 --- a/drivers/staging/hv/hv_mouse.c +++ b/drivers/staging/hv/hv_mouse.c @@ -162,10 +162,7 @@ struct mousevsc_dev { struct mousevsc_prt_msg protocol_req; struct mousevsc_prt_msg protocol_resp; /* Synchronize the request/response if needed */ - wait_queue_head_t protocol_wait_event; - wait_queue_head_t dev_info_wait_event; - int protocol_wait_condition; - int device_wait_condition; + struct completion wait_event; int dev_info_status; struct hid_descriptor *hid_desc; @@ -194,6 +191,7 @@ static struct mousevsc_dev *alloc_input_device(struct hv_device *device) input_dev->device = device; hv_set_drvdata(device, input_dev); + init_completion(&input_dev->wait_event); return input_dev; } @@ -379,8 +377,7 @@ static void mousevsc_on_receive_device_info(struct mousevsc_dev *input_device, goto cleanup; } - input_device->device_wait_condition = 1; - wake_up(&input_device->dev_info_wait_event); + complete(&input_device->wait_event); return; @@ -392,8 +389,7 @@ cleanup: input_device->report_desc = NULL; input_device->dev_info_status = -1; - input_device->device_wait_condition = 1; - wake_up(&input_device->dev_info_wait_event); + complete(&input_device->wait_event); } static void mousevsc_on_receive_input_report(struct mousevsc_dev *input_device, @@ -444,8 +440,7 @@ static void mousevsc_on_receive(struct hv_device *device, memcpy(&input_dev->protocol_resp, pipe_msg, pipe_msg->size + sizeof(struct pipe_prt_msg) - sizeof(unsigned char)); - input_dev->protocol_wait_condition = 1; - wake_up(&input_dev->protocol_wait_event); + complete(&input_dev->wait_event); break; case SynthHidInitialDeviceInfo: @@ -565,6 +560,7 @@ static void mousevsc_on_channel_callback(void *context) static int mousevsc_connect_to_vsp(struct hv_device *device) { int ret = 0; + int t; struct mousevsc_dev *input_dev; struct mousevsc_prt_msg *request; struct mousevsc_prt_msg *response; @@ -576,8 +572,6 @@ static int mousevsc_connect_to_vsp(struct hv_device *device) return -1; } - init_waitqueue_head(&input_dev->protocol_wait_event); - init_waitqueue_head(&input_dev->dev_info_wait_event); request = &input_dev->protocol_req; @@ -607,10 +601,8 @@ static int mousevsc_connect_to_vsp(struct hv_device *device) goto cleanup; } - input_dev->protocol_wait_condition = 0; - wait_event_timeout(input_dev->protocol_wait_event, - input_dev->protocol_wait_condition, msecs_to_jiffies(1000)); - if (input_dev->protocol_wait_condition == 0) { + t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ); + if (t == 0) { ret = -ETIMEDOUT; goto cleanup; } @@ -624,10 +616,8 @@ static int mousevsc_connect_to_vsp(struct hv_device *device) goto cleanup; } - input_dev->device_wait_condition = 0; - wait_event_timeout(input_dev->dev_info_wait_event, - input_dev->device_wait_condition, msecs_to_jiffies(1000)); - if (input_dev->device_wait_condition == 0) { + t = wait_for_completion_timeout(&input_dev->wait_event, 5*HZ); + if (t == 0) { ret = -ETIMEDOUT; goto cleanup; } -- 2.11.0