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mei: debugfs: adjust active clients print buffer
In case of many active host clients clients (41 and more) 1K buffer is not enough for full information print. Calculate buffer size according to real clients number. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
a96c548291
commit
2690025482
1 changed files with 24 additions and 9 deletions
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@ -50,6 +50,7 @@ static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
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}
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pos += scnprintf(buf + pos, bufsz - pos, HDR);
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#undef HDR
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/* if the driver is not enabled the list won't be consistent */
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if (dev->dev_state != MEI_DEV_ENABLED)
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@ -90,24 +91,38 @@ static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
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{
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struct mei_device *dev = fp->private_data;
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struct mei_cl *cl;
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const size_t bufsz = 1024;
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size_t bufsz = 1;
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char *buf;
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int i = 0;
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int pos = 0;
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int ret;
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#define HDR " |me|host|state|rd|wr|\n"
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if (!dev)
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return -ENODEV;
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buf = kzalloc(bufsz, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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pos += scnprintf(buf + pos, bufsz - pos,
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" |me|host|state|rd|wr|\n");
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mutex_lock(&dev->device_lock);
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/*
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* if the driver is not enabled the list won't be consistent,
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* we output empty table
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*/
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if (dev->dev_state == MEI_DEV_ENABLED)
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list_for_each_entry(cl, &dev->file_list, link)
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bufsz++;
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bufsz *= sizeof(HDR) + 1;
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buf = kzalloc(bufsz, GFP_KERNEL);
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if (!buf) {
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mutex_unlock(&dev->device_lock);
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return -ENOMEM;
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}
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pos += scnprintf(buf + pos, bufsz - pos, HDR);
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#undef HDR
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/* if the driver is not enabled the list won't be consistent */
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if (dev->dev_state != MEI_DEV_ENABLED)
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goto out;
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@ -115,7 +130,7 @@ static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
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list_for_each_entry(cl, &dev->file_list, link) {
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pos += scnprintf(buf + pos, bufsz - pos,
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"%2d|%2d|%4d|%5d|%2d|%2d|\n",
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"%3d|%2d|%4d|%5d|%2d|%2d|\n",
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i, mei_cl_me_id(cl), cl->host_client_id, cl->state,
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!list_empty(&cl->rd_completed), cl->writing_state);
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i++;
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