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caif_virtio: Check that vringh_config is not null

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Check that vringh_config is not NULL before using it.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Sjur Brændeland 2013-03-24 14:19:59 +10:30 committed by Rusty Russell
parent b2273be8d2
commit a8c7687bf2
1 changed files with 4 additions and 0 deletions
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4
drivers/net/caif/caif_virtio.c
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@ -670,6 +670,10 @@ static int cfv_probe(struct virtio_device *vdev)
spin_lock_init(&cfv->tx_lock);
/* Get the RX virtio ring. This is a "host side vring". */
err = -ENODEV;
if (!vdev->vringh_config || !vdev->vringh_config->find_vrhs)
goto err;
err = vdev->vringh_config->find_vrhs(vdev, 1, &cfv->vr_rx, &vrh_cbs);
if (err)
goto err;