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| author |   Alexander Usyskin <alexander.usyskin@intel.com> | 2014-09-29 16:31:34 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-09-29 11:56:00 -0400 |
| commit | c44952003fc949e81ae0a0297e91894d8724f7fe (patch) | |
| tree | 49efe9b2d2ee60c0b8a5b0752ffa97ad0681a9d0 /drivers/misc/mei/debugfs.c | |
| parent | mei: add hbm and pg state in devstate debugfs print (diff) | |
| download | linux-dev-c44952003fc949e81ae0a0297e91894d8724f7fe.tar.xz linux-dev-c44952003fc949e81ae0a0297e91894d8724f7fe.zip | |
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>
Diffstat (limited to 'drivers/misc/mei/debugfs.c')
| -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; |