crypto: omap-sham - Remove useless check for non-null request

[platform/kernel/linux-rpi.git] / drivers / crypto / omap-sham.c

diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 7fb9eef..fd380a7 100644 (file)
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -817,9 +817,6 @@ static int omap_sham_prepare_request(struct ahash_request *req, bool update)
        bool final = rctx->flags & BIT(FLAGS_FINUP);
        int xmit_len, hash_later;
 
-       if (!req)
-               return 0;
-
        bs = get_block_size(rctx);
 
        if (update)
@@ -2051,9 +2048,47 @@ 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,
 };