diff options
| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2009-04-24 22:35:03 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-05-08 15:45:00 -0700 |
| commit | 87b59eac0914ab407df57fe23d880dccd9a9436d (patch) | |
| tree | 77381d04ed287afc396895044b77a1230a2392a9 | |
| parent | 52d2d659032c0110f51b4f9dcf2d4799c48a72f2 (diff) | |
virtio-rng: Remove false BUG for spurious callbacks
upstream commit: e5b89542ea18020961882228c26db3ba87f6e608
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>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
| -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); |