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: Richard Weinberger <richard@nod.at>
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index d27c703..1812bc8 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -1252,12 +1252,28 @@
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 */
static void do_ubd_request(struct request_queue *q)
{
struct io_thread_req *io_req;
struct request *req;
- int n;
while(1){
struct ubd *dev = q->queuedata;
@@ -1283,8 +1299,7 @@
return;
}
prepare_flush_request(req, io_req);
- os_write_file(thread_fd, &io_req,
- sizeof(struct io_thread_req *));
+ submit_request(io_req, dev);
}
while(dev->start_sg < dev->end_sg){
@@ -1301,17 +1316,8 @@
(unsigned long long)dev->rq_pos << 9,
sg->offset, sg->length, sg_page(sg));
- n = os_write_file(thread_fd, &io_req,
- 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);
+ if (submit_request(io_req, dev) == false)
return;
- }
dev->rq_pos += sg->length >> 9;
dev->start_sg++;