Staging: hv: Use the rinbuffer size info in struct storvsc_device_info

Use the rinbuffer size info in struct storvsc_device_info.
Signed-off-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: NAbhishek Kane <v-abkane@microsoft.com>
Signed-off-by: NHank Janssen <hjanssen@microsoft.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/blkvsc_drv.c

@@ -146,6 +146,8 @@ static int blkvsc_device_add(struct hv_device *device,
 
 	device_info = (struct storvsc_device_info *)additional_info;
 
+	device_info->ring_buffer_size = blkvsc_ringbuffer_size;
+
 	ret = storvsc_dev_add(device, additional_info);
 	if (ret != 0)
 		return ret;
@@ -818,14 +820,11 @@ static const struct block_device_operations block_ops = {
  */
 static int blkvsc_drv_init(void)
 {
-	struct storvsc_driver *storvsc_drv = &blkvsc_drv;
 	struct hv_driver *drv = &blkvsc_drv.base;
 	int ret;
 
 	BUILD_BUG_ON(sizeof(sector_t) != 8);
 
-	storvsc_drv->ring_buffer_size = blkvsc_ringbuffer_size;
-
 	memcpy(&drv->dev_type, &dev_type, sizeof(struct hv_guid));
 	drv->name = drv_name;
 	drv->driver.name = drv_name;

drivers/staging/hv/storvsc.c

@@ -363,19 +363,17 @@ static void storvsc_on_channel_callback(void *context)
 	return;
 }
 
-static int storvsc_connect_to_vsp(struct hv_device *device)
+static int storvsc_connect_to_vsp(struct hv_device *device, u32 ring_size)
 {
 	struct vmstorage_channel_properties props;
-	struct storvsc_driver *stor_driver;
 	int ret;
 
-	stor_driver = drv_to_stordrv(device->device.driver);
 	memset(&props, 0, sizeof(struct vmstorage_channel_properties));
 
 	/* Open the channel */
 	ret = vmbus_open(device->channel,
-			 stor_driver->ring_buffer_size,
-			 stor_driver->ring_buffer_size,
+			 ring_size,
+			 ring_size,
 			 (void *)&props,
 			 sizeof(struct vmstorage_channel_properties),
 			 storvsc_on_channel_callback, device);
@@ -413,7 +411,7 @@ int storvsc_dev_add(struct hv_device *device,
 
 	stor_device->port_number = device_info->port_number;
 	/* Send it back up */
-	ret = storvsc_connect_to_vsp(device);
+	ret = storvsc_connect_to_vsp(device, device_info->ring_buffer_size);
 
 	device_info->path_id = stor_device->path_id;
 	device_info->target_id = stor_device->target_id;

drivers/staging/hv/storvsc_drv.c

@@ -733,6 +733,7 @@ static int storvsc_probe(struct hv_device *device)
 	}
 
 	device_info.port_number = host->host_no;
+	device_info.ring_buffer_size  = storvsc_ringbuffer_size;
 	/* Call to the vsc driver to add the device */
 	ret = storvsc_dev_add(device, (void *)&device_info);