Commit 87b31c22 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Staging: hv: Get rid of the forward declaration for blkvsc_do_read_capacity() 



Get rid of the forward declaration for blkvsc_do_read_capacity() by moving
the code around.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarAbhishek Kane <v-abkane@microsoft.com>
Signed-off-by: default avatarHank Janssen <hjanssen@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 8138bd95

drivers/staging/hv/blkvsc_drv.c

+76 −76
Original line number Diff line number Diff line
@@ -693,6 +693,82 @@ static int blkvsc_release(struct gendisk *disk, fmode_t mode) 
	return 0;

}





/* Do a scsi READ_CAPACITY cmd here to get the size of the disk */

static int blkvsc_do_read_capacity(struct block_device_context *blkdev)

{

	struct blkvsc_request *blkvsc_req;

	struct page *page_buf;

	unsigned char *buf;

	struct scsi_sense_hdr sense_hdr;

	struct vmscsi_request *vm_srb;



	DPRINT_DBG(BLKVSC_DRV, "blkvsc_do_read_capacity()\n");



	blkdev->sector_size = 0;

	blkdev->capacity = 0;

	blkdev->media_not_present = 0; /* assume a disk is present */



	blkvsc_req = kmem_cache_zalloc(blkdev->request_pool, GFP_KERNEL);

	if (!blkvsc_req)

		return -ENOMEM;



	memset(blkvsc_req, 0, sizeof(struct blkvsc_request));

	page_buf = alloc_page(GFP_KERNEL);

	if (!page_buf) {

		kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req);

		return -ENOMEM;

	}



	vm_srb = &blkvsc_req->request.vstor_packet.vm_srb;

	init_completion(&blkvsc_req->request.wait_event);

	blkvsc_req->dev = blkdev;

	blkvsc_req->req = NULL;

	blkvsc_req->write = 0;



	blkvsc_req->request.data_buffer.pfn_array[0] =

	page_to_pfn(page_buf);

	blkvsc_req->request.data_buffer.offset = 0;

	blkvsc_req->request.data_buffer.len = 8;



	blkvsc_req->cmnd[0] = READ_CAPACITY;

	blkvsc_req->cmd_len = 16;



	blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion);



	DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete\n",

		   blkvsc_req);



	wait_for_completion_interruptible(&blkvsc_req->request.wait_event);



	/* check error */

	if (vm_srb->scsi_status) {

		scsi_normalize_sense(blkvsc_req->sense_buffer,

				     SCSI_SENSE_BUFFERSIZE, &sense_hdr);



		if (sense_hdr.asc == 0x3A) {

			/* Medium not present */

			blkdev->media_not_present = 1;

		}

		return 0;

	}

	buf = kmap(page_buf);



	/* be to le */

	blkdev->capacity = ((buf[0] << 24) | (buf[1] << 16) |

			    (buf[2] << 8) | buf[3]) + 1;

	blkdev->sector_size = (buf[4] << 24) | (buf[5] << 16) |

			      (buf[6] << 8) | buf[7];



	kunmap(page_buf);



	__free_page(page_buf);



	kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req);



	return 0;

}



/* Static decl */

static int blkvsc_probe(struct device *dev);

static int blkvsc_revalidate_disk(struct gendisk *gd);
@@ -701,7 +777,6 @@ static void blkvsc_request_completion(struct hv_storvsc_request *request); 
static int blkvsc_do_request(struct block_device_context *blkdev,

			     struct request *req);

static int blkvsc_do_inquiry(struct block_device_context *blkdev);

static int blkvsc_do_read_capacity(struct block_device_context *blkdev);

static int blkvsc_do_read_capacity16(struct block_device_context *blkdev);

static int blkvsc_do_pending_reqs(struct block_device_context *blkdev);
@@ -1035,81 +1110,6 @@ static int blkvsc_do_inquiry(struct block_device_context *blkdev) 
	return 0;

}



/* Do a scsi READ_CAPACITY cmd here to get the size of the disk */

static int blkvsc_do_read_capacity(struct block_device_context *blkdev)

{

	struct blkvsc_request *blkvsc_req;

	struct page *page_buf;

	unsigned char *buf;

	struct scsi_sense_hdr sense_hdr;

	struct vmscsi_request *vm_srb;



	DPRINT_DBG(BLKVSC_DRV, "blkvsc_do_read_capacity()\n");



	blkdev->sector_size = 0;

	blkdev->capacity = 0;

	blkdev->media_not_present = 0; /* assume a disk is present */



	blkvsc_req = kmem_cache_zalloc(blkdev->request_pool, GFP_KERNEL);

	if (!blkvsc_req)

		return -ENOMEM;



	memset(blkvsc_req, 0, sizeof(struct blkvsc_request));

	page_buf = alloc_page(GFP_KERNEL);

	if (!page_buf) {

		kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req);

		return -ENOMEM;

	}



	vm_srb = &blkvsc_req->request.vstor_packet.vm_srb;

	init_completion(&blkvsc_req->request.wait_event);

	blkvsc_req->dev = blkdev;

	blkvsc_req->req = NULL;

	blkvsc_req->write = 0;



	blkvsc_req->request.data_buffer.pfn_array[0] =

	page_to_pfn(page_buf);

	blkvsc_req->request.data_buffer.offset = 0;

	blkvsc_req->request.data_buffer.len = 8;



	blkvsc_req->cmnd[0] = READ_CAPACITY;

	blkvsc_req->cmd_len = 16;



	blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion);



	DPRINT_DBG(BLKVSC_DRV, "waiting %p to complete\n",

		   blkvsc_req);



	wait_for_completion_interruptible(&blkvsc_req->request.wait_event);



	/* check error */

	if (vm_srb->scsi_status) {

		scsi_normalize_sense(blkvsc_req->sense_buffer,

				     SCSI_SENSE_BUFFERSIZE, &sense_hdr);



		if (sense_hdr.asc == 0x3A) {

			/* Medium not present */

			blkdev->media_not_present = 1;

		}

		return 0;

	}

	buf = kmap(page_buf);



	/* be to le */

	blkdev->capacity = ((buf[0] << 24) | (buf[1] << 16) |

			    (buf[2] << 8) | buf[3]) + 1;

	blkdev->sector_size = (buf[4] << 24) | (buf[5] << 16) |

			      (buf[6] << 8) | buf[7];



	kunmap(page_buf);



	__free_page(page_buf);



	kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req);



	return 0;

}



static int blkvsc_do_read_capacity16(struct block_device_context *blkdev)

{

	struct blkvsc_request *blkvsc_req;