diff options
| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2009-04-23 11:12:59 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-25 00:28:30 +0400 |
| commit | e5b89542ea18020961882228c26db3ba87f6e608 (patch) | |
| tree | d304de3e207ab02d9e02f944f54cebcf31ea2e73 /drivers/char | |
| parent | 9f5a691253924fd033a58c6b1fed57bb0a4eccf4 (diff) | |
| download | linux-e5b89542ea18020961882228c26db3ba87f6e608.tar.xz | |
virtio-rng: Remove false BUG for spurious callbacks
The virtio-rng drivers checks for spurious callbacks. Since
callbacks can be implemented via shared interrupts (e.g. PCI) this
could lead to guest kernel oopses with lots of virtio devices.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/hw_random/virtio-rng.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/hw_random/virtio-rng.c b/drivers/char/hw_random/virtio-rng.c index d0e563e4fc39..86e83f883139 100644 --- a/drivers/char/hw_random/virtio-rng.c +++ b/drivers/char/hw_random/virtio-rng.c @@ -37,9 +37,9 @@ static void random_recv_done(struct virtqueue *vq) { int len; - /* We never get spurious callbacks. */ + /* We can get spurious callbacks, e.g. shared IRQs + virtio_pci. */ if (!vq->vq_ops->get_buf(vq, &len)) - BUG(); + return; data_left = len / sizeof(random_data[0]); complete(&have_data); |