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virtio: console: Use better variable names for fill_queue operation 

We want to keep track of the number of buffers added to a vq. Use
nr_added_bufs instead of 'ret'.

Also, the users of fill_queue() overloaded a local 'err' variable to
check the numbers of buffers allocated. Use nr_added_bufs instead of
err.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reported-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Amit Shah 2010-02-24 10:37:44 +05:30
parent 604b2ad7cc
commit 335a64a5c2
1 changed files with 15 additions and 12 deletions
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27
drivers/char/virtio_console.c
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@ -1071,27 +1071,27 @@ static void config_intr(struct virtio_device *vdev)
static unsigned int fill_queue(struct virtqueue *vq, spinlock_t *lock)
{
struct port_buffer *buf;
unsigned int ret;
int err;
unsigned int nr_added_bufs;
int ret;
ret = 0;
nr_added_bufs = 0;
do {
buf = alloc_buf(PAGE_SIZE);
if (!buf)
break;
spin_lock_irq(lock);
err = add_inbuf(vq, buf);
if (err < 0) {
ret = add_inbuf(vq, buf);
if (ret < 0) {
spin_unlock_irq(lock);
free_buf(buf);
break;
}
ret++;
nr_added_bufs++;
spin_unlock_irq(lock);
} while (err > 0);
} while (ret > 0);
return ret;
return nr_added_bufs;
}
static int add_port(struct ports_device *portdev, u32 id)
@ -1100,6 +1100,7 @@ static int add_port(struct ports_device *portdev, u32 id)
struct port *port;
struct port_buffer *buf;
dev_t devt;
unsigned int nr_added_bufs;
int err;
port = kmalloc(sizeof(*port), GFP_KERNEL);
@ -1144,8 +1145,8 @@ static int add_port(struct ports_device *portdev, u32 id)
init_waitqueue_head(&port->waitqueue);
/* Fill the in_vq with buffers so the host can send us data. */
err = fill_queue(port->in_vq, &port->inbuf_lock);
if (!err) {
nr_added_bufs = fill_queue(port->in_vq, &port->inbuf_lock);
if (!nr_added_bufs) {
dev_err(port->dev, "Error allocating inbufs\n");
err = -ENOMEM;
goto free_device;
@ -1442,12 +1443,14 @@ static int __devinit virtcons_probe(struct virtio_device *vdev)
INIT_LIST_HEAD(&portdev->ports);
if (multiport) {
unsigned int nr_added_bufs;
spin_lock_init(&portdev->cvq_lock);
INIT_WORK(&portdev->control_work, &control_work_handler);
INIT_WORK(&portdev->config_work, &config_work_handler);
err = fill_queue(portdev->c_ivq, &portdev->cvq_lock);
if (!err) {
nr_added_bufs = fill_queue(portdev->c_ivq, &portdev->cvq_lock);
if (!nr_added_bufs) {
dev_err(&vdev->dev,
"Error allocating buffers for control queue\n");
err = -ENOMEM;