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Commit bc1d72e7 authored by Richard Weinberger's avatar Richard Weinberger
Browse files

um: ubd: Introduce submit_request() 



Just a clean-up patch to remove the open coded
variants and to ensure that all requests are submitted the
same way.

Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent 805f11a0

arch/um/drivers/ubd_kern.c

+19 −13
Original line number Original line Diff line number Diff line
@@ -1252,12 +1252,28 @@ static void prepare_flush_request(struct request *req, 
	io_req->op = UBD_FLUSH;

	io_req->op = UBD_FLUSH;

}

}





static bool submit_request(struct io_thread_req *io_req, struct ubd *dev)

{

	int n = os_write_file(thread_fd, &io_req,

			     sizeof(io_req));

	if (n != sizeof(io_req)) {

		if (n != -EAGAIN)

			printk("write to io thread failed, "

			       "errno = %d\n", -n);

		else if (list_empty(&dev->restart))

			list_add(&dev->restart, &restart);



		kfree(io_req);

		return false;

	}

	return true;

}



/* Called with dev->lock held */

/* Called with dev->lock held */

static void do_ubd_request(struct request_queue *q)

static void do_ubd_request(struct request_queue *q)

{

{

	struct io_thread_req *io_req;

	struct io_thread_req *io_req;

	struct request *req;

	struct request *req;

	int n;





	while(1){

	while(1){

		struct ubd *dev = q->queuedata;

		struct ubd *dev = q->queuedata;
@@ -1283,8 +1299,7 @@ static void do_ubd_request(struct request_queue *q) 
				return;

				return;

			}

			}

			prepare_flush_request(req, io_req);

			prepare_flush_request(req, io_req);

			os_write_file(thread_fd, &io_req,

			submit_request(io_req, dev);

					  sizeof(struct io_thread_req *));

		}

		}





		while(dev->start_sg < dev->end_sg){

		while(dev->start_sg < dev->end_sg){
@@ -1301,17 +1316,8 @@ static void do_ubd_request(struct request_queue *q) 
					(unsigned long long)dev->rq_pos << 9,

					(unsigned long long)dev->rq_pos << 9,

					sg->offset, sg->length, sg_page(sg));

					sg->offset, sg->length, sg_page(sg));





			n = os_write_file(thread_fd, &io_req,

			if (submit_request(io_req, dev) == false)

					  sizeof(struct io_thread_req *));

			if(n != sizeof(struct io_thread_req *)){

				if(n != -EAGAIN)

					printk("write to io thread failed, "

					       "errno = %d\n", -n);

				else if(list_empty(&dev->restart))

					list_add(&dev->restart, &restart);

				kfree(io_req);

				return;

				return;

			}





			dev->rq_pos += sg->length >> 9;

			dev->rq_pos += sg->length >> 9;

			dev->start_sg++;

			dev->start_sg++;