4 files changed, 14 insertions, 11 deletions

diff --git a/drivers/char/hw_random/pseries-rng.c b/drivers/char/hw_random/pseries-rng.c
index 6226aa08c36a..bcf86f91800a 100644
--- a/drivers/char/hw_random/pseries-rng.c
+++ b/drivers/char/hw_random/pseries-rng.c
@@ -25,18 +25,21 @@
 #include <asm/vio.h>
 
 
-static int pseries_rng_data_read(struct hwrng *rng, u32 *data)
+static int pseries_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)
 {
+        u64 buffer[PLPAR_HCALL_BUFSIZE];
+        size_t size = max < 8 ? max : 8;
         int rc;
 
-        rc = plpar_hcall(H_RANDOM, (unsigned long *)data);
+        rc = plpar_hcall(H_RANDOM, (unsigned long *)buffer);
         if (rc != H_SUCCESS) {
                 pr_err_ratelimited("H_RANDOM call failed %d\n", rc);
                 return -EIO;
         }
+        memcpy(data, buffer, size);
 
         /* The hypervisor interface returns 64 bits */
-        return 8;
+        return size;
 }
 
 /**
@@ -55,7 +58,7 @@ static unsigned long pseries_rng_get_desired_dma(struct vio_dev *vdev)
 
 static struct hwrng pseries_rng = {
         .name           = KBUILD_MODNAME,
-        .data_read      = pseries_rng_data_read,
+        .read           = pseries_rng_read,
 };
 
 static int __init pseries_rng_probe(struct vio_dev *dev,
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 82759cef9043..04645c09fe5e 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1106,7 +1106,7 @@ static void extract_buf(struct entropy_store *r, __u8 *out)
         __mix_pool_bytes(r, hash.w, sizeof(hash.w));
         spin_unlock_irqrestore(&r->lock, flags);
 
-        memset(workspace, 0, sizeof(workspace));
+        memzero_explicit(workspace, sizeof(workspace));
 
         /*
          * In case the hash function has some recognizable output
@@ -1118,7 +1118,7 @@ static void extract_buf(struct entropy_store *r, __u8 *out)
         hash.w[2] ^= rol32(hash.w[2], 16);
 
         memcpy(out, &hash, EXTRACT_SIZE);
-        memset(&hash, 0, sizeof(hash));
+        memzero_explicit(&hash, sizeof(hash));
 }
 
 /*
@@ -1175,7 +1175,7 @@ static ssize_t extract_entropy(struct entropy_store *r, void *buf,
         }
 
         /* Wipe data just returned from memory */
-        memset(tmp, 0, sizeof(tmp));
+        memzero_explicit(tmp, sizeof(tmp));
 
         return ret;
 }
@@ -1218,7 +1218,7 @@ static ssize_t extract_entropy_user(struct entropy_store *r, void __user *buf,
         }
 
         /* Wipe data just returned from memory */
-        memset(tmp, 0, sizeof(tmp));
+        memzero_explicit(tmp, sizeof(tmp));
 
         return ret;
 }
diff --git a/drivers/char/raw.c b/drivers/char/raw.c
index 0102dc788608..a24891b97547 100644
--- a/drivers/char/raw.c
+++ b/drivers/char/raw.c
@@ -285,7 +285,7 @@ static long raw_ctl_compat_ioctl(struct file *file, unsigned int cmd,
 
 static const struct file_operations raw_fops = {
         .read           = new_sync_read,
-        .read_iter      = generic_file_read_iter,
+        .read_iter      = blkdev_read_iter,
         .write          = new_sync_write,
         .write_iter     = blkdev_write_iter,
         .fsync          = blkdev_fsync,
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index bfa640023e64..cf7a561fad7c 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -1449,8 +1449,6 @@ static int add_port(struct ports_device *portdev, u32 id)
         spin_lock_init(&port->outvq_lock);
         init_waitqueue_head(&port->waitqueue);
 
-        virtio_device_ready(portdev->vdev);
-
         /* Fill the in_vq with buffers so the host can send us data. */
         nr_added_bufs = fill_queue(port->in_vq, &port->inbuf_lock);
         if (!nr_added_bufs) {
@@ -2026,6 +2024,8 @@ static int virtcons_probe(struct virtio_device *vdev)
         spin_lock_init(&portdev->ports_lock);
         INIT_LIST_HEAD(&portdev->ports);
 
+        virtio_device_ready(portdev->vdev);
+
         if (multiport) {
                 unsigned int nr_added_bufs;