From 335a64a5c21ed58de21c0130c90c7e647cdcf572 Mon Sep 17 00:00:00 2001 From: Amit Shah Date: Wed, 24 Feb 2010 10:37:44 +0530 Subject: [PATCH] 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 Reported-by: Juan Quintela --- drivers/char/virtio_console.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 2bd6a9c..f404ccf 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; -- 2.7.4