diff options
| -rw-r--r-- | drivers/crypto/talitos.c | 13 | ||||
| -rw-r--r-- | drivers/crypto/talitos.h | 1 |
2 files changed, 12 insertions, 2 deletions
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index 43727c915a59..1bc8dd91e217 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -766,6 +766,7 @@ static int talitos_rng_init(struct hwrng *rng) static int talitos_register_rng(struct device *dev) { struct talitos_private *priv = dev_get_drvdata(dev); + int err; priv->rng.name = dev_driver_string(dev), priv->rng.init = talitos_rng_init, @@ -773,14 +774,22 @@ static int talitos_register_rng(struct device *dev) priv->rng.data_read = talitos_rng_data_read, priv->rng.priv = (unsigned long)dev; - return hwrng_register(&priv->rng); + err = hwrng_register(&priv->rng); + if (!err) + priv->rng_registered = true; + + return err; } static void talitos_unregister_rng(struct device *dev) { struct talitos_private *priv = dev_get_drvdata(dev); + if (!priv->rng_registered) + return; + hwrng_unregister(&priv->rng); + priv->rng_registered = false; } /* @@ -2673,7 +2682,7 @@ static int talitos_remove(struct platform_device *ofdev) if (hw_supports(dev, DESC_HDR_SEL0_RNG)) talitos_unregister_rng(dev); - for (i = 0; i < priv->num_channels; i++) + for (i = 0; priv->chan && i < priv->num_channels; i++) kfree(priv->chan[i].fifo); kfree(priv->chan); diff --git a/drivers/crypto/talitos.h b/drivers/crypto/talitos.h index 163cfe733bf0..0090f3211d68 100644 --- a/drivers/crypto/talitos.h +++ b/drivers/crypto/talitos.h @@ -149,6 +149,7 @@ struct talitos_private { /* hwrng device */ struct hwrng rng; + bool rng_registered; }; extern int talitos_submit(struct device *dev, int ch, struct talitos_desc *desc, |