Merge tag 'rpmsg-v4.20' of git://github.com/andersson/remoteproc

Pull rpmsg updates from Bjorn Andersson:
 "This migrates rpmsg_char to use read/write_iter to allow being
  operated using aio, removes the message size alignment requirements
  from glink, closes a potential memory leak in SMD and switches to
  %pOFn for printing device_node names"

* tag 'rpmsg-v4.20' of git://github.com/andersson/remoteproc:
  rpmsg: glink: smem: Support rx peak for size less than 4 bytes
  rpmsg: smd: fix memory leak on channel create
  rpmsg: glink: Remove chunk size word align warning
  rpmsg: Convert to using %pOFn instead of device_node.name
  rpmsg: char: Migrate to iter versions of read and write

drivers/rpmsg/qcom_glink_native.c

@@ -792,9 +792,6 @@ static int qcom_glink_rx_data(struct qcom_glink *glink, size_t avail)
 		return -EAGAIN;
 	}
 
-	if (WARN(chunk_size % 4, "Incoming data must be word aligned\n"))
-		return -EINVAL;
-
 	rcid = le16_to_cpu(hdr.msg.param1);
 	spin_lock_irqsave(&glink->idr_lock, flags);
 	channel = idr_find(&glink->rcids, rcid);

drivers/rpmsg/qcom_glink_smem.c

@@ -89,15 +89,11 @@ static void glink_smem_rx_peak(struct qcom_glink_pipe *np,
 		tail -= pipe->native.length;
 
 	len = min_t(size_t, count, pipe->native.length - tail);
-	if (len) {
-		__ioread32_copy(data, pipe->fifo + tail,
-				len / sizeof(u32));
-	}
+	if (len)
+		memcpy_fromio(data, pipe->fifo + tail, len);
 
-	if (len != count) {
-		__ioread32_copy(data + len, pipe->fifo,
-				(count - len) / sizeof(u32));
-	}
+	if (len != count)
+		memcpy_fromio(data + len, pipe->fifo, (count - len));
 }
 
 static void glink_smem_rx_advance(struct qcom_glink_pipe *np,
@@ -205,7 +201,7 @@ struct qcom_glink *qcom_glink_smem_register(struct device *parent,
 	dev->parent = parent;
 	dev->of_node = node;
 	dev->release = qcom_glink_smem_release;
-	dev_set_name(dev, "%s:%s", node->parent->name, node->name);
+	dev_set_name(dev, "%pOFn:%pOFn", node->parent, node);
 	ret = device_register(dev);
 	if (ret) {
 		pr_err("failed to register glink edge\n");

drivers/rpmsg/qcom_smd.c

@@ -1122,8 +1122,10 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed
 
 	channel->edge = edge;
 	channel->name = kstrdup(name, GFP_KERNEL);
-	if (!channel->name)
-		return ERR_PTR(-ENOMEM);
+	if (!channel->name) {
+		ret = -ENOMEM;
+		goto free_channel;
+	}
 
 	spin_lock_init(&channel->tx_lock);
 	spin_lock_init(&channel->recv_lock);
@@ -1173,6 +1175,7 @@ static struct qcom_smd_channel *qcom_smd_create_channel(struct qcom_smd_edge *ed
 
 free_name_and_channel:
 	kfree(channel->name);
+free_channel:
 	kfree(channel);
 
 	return ERR_PTR(ret);
@@ -1454,7 +1457,7 @@ struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent,
 	edge->dev.release = qcom_smd_edge_release;
 	edge->dev.of_node = node;
 	edge->dev.groups = qcom_smd_edge_groups;
-	dev_set_name(&edge->dev, "%s:%s", dev_name(parent), node->name);
+	dev_set_name(&edge->dev, "%s:%pOFn", dev_name(parent), node);
 	ret = device_register(&edge->dev);
 	if (ret) {
 		pr_err("failed to register smd edge\n");

drivers/rpmsg/rpmsg_char.c

@@ -167,9 +167,9 @@ static int rpmsg_eptdev_release(struct inode *inode, struct file *filp)
 	return 0;
 }
 
-static ssize_t rpmsg_eptdev_read(struct file *filp, char __user *buf,
-				 size_t len, loff_t *f_pos)
+static ssize_t rpmsg_eptdev_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
+	struct file *filp = iocb->ki_filp;
 	struct rpmsg_eptdev *eptdev = filp->private_data;
 	unsigned long flags;
 	struct sk_buff *skb;
@@ -205,8 +205,8 @@ static ssize_t rpmsg_eptdev_read(struct file *filp, char __user *buf,
 	if (!skb)
 		return -EFAULT;
 
-	use = min_t(size_t, len, skb->len);
-	if (copy_to_user(buf, skb->data, use))
+	use = min_t(size_t, iov_iter_count(to), skb->len);
+	if (copy_to_iter(skb->data, use, to) != use)
 		use = -EFAULT;
 
 	kfree_skb(skb);
@@ -214,16 +214,21 @@ static ssize_t rpmsg_eptdev_read(struct file *filp, char __user *buf,
 	return use;
 }
 
-static ssize_t rpmsg_eptdev_write(struct file *filp, const char __user *buf,
-				  size_t len, loff_t *f_pos)
+static ssize_t rpmsg_eptdev_write_iter(struct kiocb *iocb,
+				       struct iov_iter *from)
 {
+	struct file *filp = iocb->ki_filp;
 	struct rpmsg_eptdev *eptdev = filp->private_data;
+	size_t len = iov_iter_count(from);
 	void *kbuf;
 	int ret;
 
-	kbuf = memdup_user(buf, len);
-	if (IS_ERR(kbuf))
-		return PTR_ERR(kbuf);
+	kbuf = kzalloc(len, GFP_KERNEL);
+	if (!kbuf)
+		return -ENOMEM;
+
+	if (!copy_from_iter_full(kbuf, len, from))
+		return -EFAULT;
 
 	if (mutex_lock_interruptible(&eptdev->ept_lock)) {
 		ret = -ERESTARTSYS;
@@ -281,8 +286,8 @@ static const struct file_operations rpmsg_eptdev_fops = {
 	.owner = THIS_MODULE,
 	.open = rpmsg_eptdev_open,
 	.release = rpmsg_eptdev_release,
-	.read = rpmsg_eptdev_read,
-	.write = rpmsg_eptdev_write,
+	.read_iter = rpmsg_eptdev_read_iter,
+	.write_iter = rpmsg_eptdev_write_iter,
 	.poll = rpmsg_eptdev_poll,
 	.unlocked_ioctl = rpmsg_eptdev_ioctl,
 	.compat_ioctl = rpmsg_eptdev_ioctl,