diff options
| author | Tomas Winkler <tomas.winkler@intel.com> | 2015-01-11 01:07:16 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-25 20:17:56 +0300 |
| commit | 79563db9ddd37908343103debf20da716ccc5ce4 (patch) | |
| tree | 4592508aac9c692292db1fa13a622afe62e3a8dd /drivers/misc/mei/debugfs.c | |
| parent | 3542f6b1836d8940615104e22248bb9b7cf54f5f (diff) | |
| download | linux-79563db9ddd37908343103debf20da716ccc5ce4.tar.xz | |
mei: add reference counting for me clients
To support dynamic addition and removal of
me clients we add reference counter.
Update kdoc with locking requirements.
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 | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c index b60b4263cf0f..b125380ee871 100644 --- a/drivers/misc/mei/debugfs.c +++ b/drivers/misc/mei/debugfs.c @@ -21,20 +21,22 @@ #include <linux/mei.h> #include "mei_dev.h" +#include "client.h" #include "hw.h" static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf, size_t cnt, loff_t *ppos) { struct mei_device *dev = fp->private_data; - struct mei_me_client *me_cl; + struct mei_me_client *me_cl, *n; size_t bufsz = 1; char *buf; int i = 0; int pos = 0; int ret; -#define HDR " |id|fix| UUID |con|msg len|sb|\n" +#define HDR \ +" |id|fix| UUID |con|msg len|sb|refc|\n" mutex_lock(&dev->device_lock); @@ -54,16 +56,22 @@ static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf, if (dev->dev_state != MEI_DEV_ENABLED) goto out; - list_for_each_entry(me_cl, &dev->me_clients, list) { - - pos += scnprintf(buf + pos, bufsz - pos, - "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|\n", - i++, me_cl->client_id, - me_cl->props.fixed_address, - &me_cl->props.protocol_name, - me_cl->props.max_number_of_connections, - me_cl->props.max_msg_length, - me_cl->props.single_recv_buf); + list_for_each_entry_safe(me_cl, n, &dev->me_clients, list) { + + me_cl = mei_me_cl_get(me_cl); + if (me_cl) { + pos += scnprintf(buf + pos, bufsz - pos, + "%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|\n", + i++, me_cl->client_id, + me_cl->props.fixed_address, + &me_cl->props.protocol_name, + me_cl->props.max_number_of_connections, + me_cl->props.max_msg_length, + me_cl->props.single_recv_buf, + atomic_read(&me_cl->refcnt.refcount)); + } + + mei_me_cl_put(me_cl); } out: mutex_unlock(&dev->device_lock); |