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mei: debugfs: adjust print buffer 

In case of many me clients (15 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>
hifive-unleashed-5.1
Alexander Usyskin 2014-09-29 16:31:34 +03:00 committed by Greg Kroah-Hartman
parent 1beeb4b9fb
commit c44952003f
1 changed files with 15 additions and 7 deletions
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22
drivers/misc/mei/debugfs.c
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@ -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;