From 26a197396253c1774b2affce2e29306aca9ee86a Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 22 Apr 2011 14:55:11 -0700 Subject: [PATCH] Staging: hv: Get rid of the function blkvsc_do_flush() Get rid of the function blkvsc_do_flush() and instead use the common function to force a device flush. Signed-off-by: K. Y. Srinivasan Signed-off-by: Haiyang Zhang Signed-off-by: Hank Janssen Signed-off-by: Greg Kroah-Hartman --- drivers/staging/hv/blkvsc_drv.c | 52 +++++++++------------------------ 1 file changed, 14 insertions(+), 38 deletions(-) diff --git a/drivers/staging/hv/blkvsc_drv.c b/drivers/staging/hv/blkvsc_drv.c index 7fab3c74f218..a7ae4371d168 100644 --- a/drivers/staging/hv/blkvsc_drv.c +++ b/drivers/staging/hv/blkvsc_drv.c @@ -49,6 +49,7 @@ enum blkvsc_device_type { enum blkvsc_op_type { DO_INQUIRY, DO_CAPACITY, + DO_FLUSH, }; /* @@ -451,6 +452,13 @@ static int blkvsc_do_operation(struct block_device_context *blkdev, blkvsc_req->cmd_len = 16; blkvsc_req->request.data_buffer.len = 8; break; + + case DO_FLUSH: + blkvsc_req->cmnd[0] = SYNCHRONIZE_CACHE; + blkvsc_req->cmd_len = 10; + blkvsc_req->request.data_buffer.pfn_array[0] = 0; + blkvsc_req->request.data_buffer.len = 0; + break; default: ret = -EINVAL; goto cleanup; @@ -502,6 +510,9 @@ static int blkvsc_do_operation(struct block_device_context *blkdev, (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | buf[7]; break; + default: + break; + } cleanup: @@ -515,41 +526,6 @@ cleanup: return ret; } -static int blkvsc_do_flush(struct block_device_context *blkdev) -{ - struct blkvsc_request *blkvsc_req; - - DPRINT_DBG(BLKVSC_DRV, "blkvsc_do_flush()\n"); - - if (blkdev->device_type != HARDDISK_TYPE) - return 0; - - blkvsc_req = kmem_cache_zalloc(blkdev->request_pool, GFP_KERNEL); - if (!blkvsc_req) - return -ENOMEM; - - memset(blkvsc_req, 0, sizeof(struct blkvsc_request)); - 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] = 0; - blkvsc_req->request.data_buffer.offset = 0; - blkvsc_req->request.data_buffer.len = 0; - - blkvsc_req->cmnd[0] = SYNCHRONIZE_CACHE; - blkvsc_req->cmd_len = 10; - - blkvsc_submit_request(blkvsc_req, blkvsc_cmd_completion); - - wait_for_completion_interruptible(&blkvsc_req->request.wait_event); - - kmem_cache_free(blkvsc_req->dev->request_pool, blkvsc_req); - - return 0; -} - static int blkvsc_cancel_pending_reqs(struct block_device_context *blkdev) { @@ -676,7 +652,7 @@ static int blkvsc_remove(struct device *device) udelay(100); } - blkvsc_do_flush(blkdev); + blkvsc_do_operation(blkdev, DO_FLUSH); spin_lock_irqsave(&blkdev->lock, flags); @@ -720,7 +696,7 @@ static void blkvsc_shutdown(struct device *device) udelay(100); } - blkvsc_do_flush(blkdev); + blkvsc_do_operation(blkdev, DO_FLUSH); spin_lock_irqsave(&blkdev->lock, flags); @@ -740,7 +716,7 @@ static int blkvsc_release(struct gendisk *disk, fmode_t mode) spin_lock(&blkdev->lock); if (blkdev->users == 1) { spin_unlock(&blkdev->lock); - blkvsc_do_flush(blkdev); + blkvsc_do_operation(blkdev, DO_FLUSH); spin_lock(&blkdev->lock); } -- 2.20.1