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authorAmit Shah <amit.shah@redhat.com>2010-02-24 10:37:44 +0530
committerAmit Shah <amit.shah@redhat.com>2010-03-04 13:40:39 +0530
commit335a64a5c21ed58de21c0130c90c7e647cdcf572 (patch)
tree50019062a9f17134ac38a4a9b999f6112e6c818e
parent604b2ad7ccb11569d3b843bb1ce0fbe034e70769 (diff)
downloadblackbird-op-linux-335a64a5c21ed58de21c0130c90c7e647cdcf572.tar.gz
blackbird-op-linux-335a64a5c21ed58de21c0130c90c7e647cdcf572.zip
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>
-rw-r--r--drivers/char/virtio_console.c27
1 files changed, 15 insertions, 12 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 2bd6a9c302c8..f404ccfc9c20 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -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;
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