diff options
| -rw-r--r-- | drivers/crypto/omap-sham.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c index 7fb9eef4e724..8e7e1582ef69 100644 --- a/drivers/crypto/omap-sham.c +++ b/drivers/crypto/omap-sham.c @@ -2051,9 +2051,47 @@ 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_sham_dev *dd = dev_get_drvdata(dev); + + return sprintf(buf, "%d\n", dd->queue.max_qlen); +} + +static ssize_t queue_len_store(struct device *dev, + struct device_attribute *attr, const char *buf, + size_t size) +{ + struct omap_sham_dev *dd = dev_get_drvdata(dev); + 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_irqsave(&dd->lock, flags); + dd->queue.max_qlen = value; + spin_unlock_irqrestore(&dd->lock, flags); + + return size; +} + +static DEVICE_ATTR_RW(queue_len); static DEVICE_ATTR_RW(fallback); static struct attribute *omap_sham_attrs[] = { + &dev_attr_queue_len.attr, &dev_attr_fallback.attr, NULL, }; |