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virtio-rng: don't crash if virtqueue is broken.

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A bad implementation of virtio might cause us to mark the virtqueue
broken: we'll dev_err() in that case, and the device is useless, but
let's not BUG().

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2014-03-13 11:23:40 +10:30
parent 4951cc9083
commit 9914a76617
1 changed files with 1 additions and 2 deletions
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3
drivers/char/hw_random/virtio-rng.c
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@@ -47,8 +47,7 @@ static void register_buffer(u8 *buf, size_t size)
sg_init_one(&sg, buf, size); sg_init_one(&sg, buf, size);
/* There should always be room for one buffer. */ /* There should always be room for one buffer. */
if (virtqueue_add_inbuf(vq, &sg, 1, buf, GFP_KERNEL) < 0) virtqueue_add_inbuf(vq, &sg, 1, buf, GFP_KERNEL);
BUG();
virtqueue_kick(vq); virtqueue_kick(vq);
} }