diff options
| -rw-r--r-- | drivers/rpmsg/rpmsg_char.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/drivers/rpmsg/rpmsg_char.c b/drivers/rpmsg/rpmsg_char.c index a76b963a7e50..eea5ebbb5119 100644 --- a/drivers/rpmsg/rpmsg_char.c +++ b/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, |