diff options
| -rw-r--r-- | drivers/misc/mei/debugfs.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c index 2399b3181e6c..ca2a12d702a9 100644 --- a/drivers/misc/mei/debugfs.c +++ b/drivers/misc/mei/debugfs.c @@ -29,20 +29,28 @@ static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf, { struct mei_device *dev = fp->private_data; struct mei_me_client *me_cl; - const size_t bufsz = 1024; - char *buf = kzalloc(bufsz, GFP_KERNEL); + size_t bufsz = 1; + char *buf; int i = 0; int pos = 0; int ret; - if (!buf) - return -ENOMEM; - - pos += scnprintf(buf + pos, bufsz - pos, - " |id|addr| UUID |con|msg len|\n"); +#define HDR " |id|addr| UUID |con|msg len|\n" mutex_lock(&dev->device_lock); + list_for_each_entry(me_cl, &dev->me_clients, list) + bufsz++; + + bufsz *= sizeof(HDR) + 1; + buf = kzalloc(bufsz, GFP_KERNEL); + if (!buf) { + mutex_unlock(&dev->device_lock); + return -ENOMEM; + } + + pos += scnprintf(buf + pos, bufsz - pos, HDR); + /* if the driver is not enabled the list won't be consistent */ if (dev->dev_state != MEI_DEV_ENABLED) goto out; |