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authorRusty Russell <rusty@rustcorp.com.au>2009-09-23 22:26:31 -0600
committerRusty Russell <rusty@rustcorp.com.au>2009-09-23 22:26:31 +0930
commit3c1b27d5043086a485f8526353ae9fe37bfa1065 (patch)
treee3b6eda3c66bcd1fc3af6e7fa6e4e3af77459474 /drivers/char/hw_random/virtio-rng.c
parentf68d24082e22ccee3077d11aeb6dc5354f0ca7f1 (diff)
downloadop-kernel-dev-3c1b27d5043086a485f8526353ae9fe37bfa1065.zip
op-kernel-dev-3c1b27d5043086a485f8526353ae9fe37bfa1065.tar.gz
virtio: make add_buf return capacity remaining
This API change means that virtio_net can tell how much capacity remains for buffers. It's necessarily fuzzy, since VIRTIO_RING_F_INDIRECT_DESC means we can fit any number of descriptors in one, *if* we can kmalloc. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Dinesh Subhraveti <dineshs@us.ibm.com>
Diffstat (limited to 'drivers/char/hw_random/virtio-rng.c')
-rw-r--r--drivers/char/hw_random/virtio-rng.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/hw_random/virtio-rng.c b/drivers/char/hw_random/virtio-rng.c
index 32216b6..b6c24dc 100644
--- a/drivers/char/hw_random/virtio-rng.c
+++ b/drivers/char/hw_random/virtio-rng.c
@@ -51,7 +51,7 @@ static void register_buffer(void)
sg_init_one(&sg, random_data+data_left, RANDOM_DATA_SIZE-data_left);
/* There should always be room for one buffer. */
- if (vq->vq_ops->add_buf(vq, &sg, 0, 1, random_data) != 0)
+ if (vq->vq_ops->add_buf(vq, &sg, 0, 1, random_data) < 0)
BUG();
vq->vq_ops->kick(vq);
}
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