diff options
| -rw-r--r-- | drivers/crypto/omap-aes.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 0b2523d107e3..9019f6b67986 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -1069,9 +1069,52 @@ static ssize_t fallback_store(struct device *dev, struct device_attribute *attr, return size; } +static ssize_t queue_len_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct omap_aes_dev *dd = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", dd->engine->queue.max_qlen); +} + +static ssize_t queue_len_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t size) +{ + struct omap_aes_dev *dd; + ssize_t status; + long value; + unsigned long flags; + + status = kstrtol(buf, 0, &value); + if (status) + return status; + + if (value < 1) + return -EINVAL; + + /* + * Changing the queue size in fly is safe, if size becomes smaller + * than current size, it will just not accept new entries until + * it has shrank enough. + */ + spin_lock_bh(&list_lock); + list_for_each_entry(dd, &dev_list, list) { + spin_lock_irqsave(&dd->lock, flags); + dd->engine->queue.max_qlen = value; + dd->aead_queue.base.max_qlen = value; + spin_unlock_irqrestore(&dd->lock, flags); + } + spin_unlock_bh(&list_lock); + + return size; +} + +static DEVICE_ATTR_RW(queue_len); static DEVICE_ATTR_RW(fallback); static struct attribute *omap_aes_attrs[] = { + &dev_attr_queue_len.attr, &dev_attr_fallback.attr, NULL, }; |