crypto: hisilicon - allow smaller reads in debugfs

[linux-2.6-microblaze.git] / drivers / crypto / hisilicon / qm.c

diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 9bb263c..13ccb9e 100644 (file)
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -1064,19 +1064,10 @@ static ssize_t qm_cmd_read(struct file *filp, char __user *buffer,
        char buf[QM_DBG_READ_LEN];
        int len;
 
-       if (*pos)
-               return 0;
-
-       if (count < QM_DBG_READ_LEN)
-               return -ENOSPC;
+       len = scnprintf(buf, QM_DBG_READ_LEN, "%s\n",
+                       "Please echo help to cmd to get help information");
 
-       len = snprintf(buf, QM_DBG_READ_LEN, "%s\n",
-                      "Please echo help to cmd to get help information");
-
-       if (copy_to_user(buffer, buf, len))
-               return -EFAULT;
-
-       return (*pos = len);
+       return simple_read_from_buffer(buffer, count, pos, buf, len);
 }
 
 static void *qm_ctx_alloc(struct hisi_qm *qm, size_t ctx_size,
@@ -2691,24 +2682,12 @@ static ssize_t qm_status_read(struct file *filp, char __user *buffer,
 {
        struct hisi_qm *qm = filp->private_data;
        char buf[QM_DBG_READ_LEN];
-       int val, cp_len, len;
-
-       if (*pos)
-               return 0;
-
-       if (count < QM_DBG_READ_LEN)
-               return -ENOSPC;
+       int val, len;
 
        val = atomic_read(&qm->status.flags);
-       len = snprintf(buf, QM_DBG_READ_LEN, "%s\n", qm_s[val]);
-       if (!len)
-               return -EFAULT;
-
-       cp_len = copy_to_user(buffer, buf, len);
-       if (cp_len)
-               return -EFAULT;
+       len = scnprintf(buf, QM_DBG_READ_LEN, "%s\n", qm_s[val]);
 
-       return (*pos = len);
+       return simple_read_from_buffer(buffer, count, pos, buf, len);
 }
 
 static const struct file_operations qm_status_fops = {