Staging: hv: Move the context field from struct hv_storvsc_request

In preparation of consolidating all I/O request state, move
the context field from struct hv_storvsc_request to
struct storvsc_request_extension.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/hv/blkvsc_drv.c

@@ -941,7 +941,7 @@ static int blkvsc_submit_request(struct blkvsc_request *blkvsc_req,
 	vm_srb->data_in = blkvsc_req->write ? WRITE_TYPE : READ_TYPE;
 
 	storvsc_req->on_io_completion = request_completion;
-	storvsc_req->context = blkvsc_req;
+	storvsc_req->extension.context = blkvsc_req;
 
 	vm_srb->port_number = blkdev->port;
 	vm_srb->path_id = blkdev->path;
@@ -1138,7 +1138,7 @@ static int blkvsc_do_request(struct block_device_context *blkdev,
 static void blkvsc_cmd_completion(struct hv_storvsc_request *request)
 {
 	struct blkvsc_request *blkvsc_req =
-			(struct blkvsc_request *)request->context;
+			(struct blkvsc_request *)request->extension.context;
 	struct block_device_context *blkdev =
 			(struct block_device_context *)blkvsc_req->dev;
 	struct scsi_sense_hdr sense_hdr;
@@ -1160,7 +1160,7 @@ static void blkvsc_cmd_completion(struct hv_storvsc_request *request)
 static void blkvsc_request_completion(struct hv_storvsc_request *request)
 {
 	struct blkvsc_request *blkvsc_req =
-			(struct blkvsc_request *)request->context;
+			(struct blkvsc_request *)request->extension.context;
 	struct block_device_context *blkdev =
 			(struct block_device_context *)blkvsc_req->dev;
 	unsigned long flags;

drivers/staging/hv/storvsc_api.h

@@ -63,6 +63,7 @@ struct storvsc_request_extension {
 	struct completion wait_event;
 
 	unsigned char *sense_buffer;
+	void *context;
 
 	struct vstor_packet vstor_packet;
 };
@@ -71,8 +72,6 @@ struct hv_storvsc_request {
 	u32 status;
 	u32 bytes_xfer;
 
-	void *context;
-
 	void (*on_io_completion)(struct hv_storvsc_request *request);
 
 	struct storvsc_request_extension extension;

drivers/staging/hv/storvsc_drv.c

@@ -448,7 +448,7 @@ static int storvsc_remove(struct device *device)
 static void storvsc_commmand_completion(struct hv_storvsc_request *request)
 {
 	struct storvsc_cmd_request *cmd_request =
-		(struct storvsc_cmd_request *)request->context;
+		(struct storvsc_cmd_request *)request->extension.context;
 	struct scsi_cmnd *scmnd = cmd_request->cmd;
 	struct host_device_context *host_device_ctx =
 		(struct host_device_context *)scmnd->device->host->hostdata;
@@ -771,7 +771,7 @@ static int storvsc_queuecommand_lck(struct scsi_cmnd *scmnd,
 	}
 
 	request->on_io_completion = storvsc_commmand_completion;
-	request->context = cmd_request;/* scmnd; */
+	request->extension.context = cmd_request;/* scmnd; */
 
 	/* request->PortId = scmnd->device->channel; */
 	vm_srb->port_number = host_device_ctx->port;