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path: root/drivers/misc/mei/debugfs.c
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Diffstat (limited to 'drivers/misc/mei/debugfs.c')
-rw-r--r--drivers/misc/mei/debugfs.c21
1 files changed, 10 insertions, 11 deletions
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index b125380ee871..d9cd7e6ee484 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -28,7 +28,7 @@ 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, *n;
+ struct mei_me_client *me_cl;
size_t bufsz = 1;
char *buf;
int i = 0;
@@ -38,15 +38,14 @@ static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
#define HDR \
" |id|fix| UUID |con|msg len|sb|refc|\n"
- mutex_lock(&dev->device_lock);
-
+ down_read(&dev->me_clients_rwsem);
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);
+ up_read(&dev->me_clients_rwsem);
return -ENOMEM;
}
@@ -56,10 +55,9 @@ 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_safe(me_cl, n, &dev->me_clients, list) {
+ list_for_each_entry(me_cl, &dev->me_clients, list) {
- me_cl = mei_me_cl_get(me_cl);
- if (me_cl) {
+ if (mei_me_cl_get(me_cl)) {
pos += scnprintf(buf + pos, bufsz - pos,
"%2d|%2d|%3d|%pUl|%3d|%7d|%2d|%4d|\n",
i++, me_cl->client_id,
@@ -69,12 +67,13 @@ static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
me_cl->props.max_msg_length,
me_cl->props.single_recv_buf,
atomic_read(&me_cl->refcnt.refcount));
- }
- mei_me_cl_put(me_cl);
+ mei_me_cl_put(me_cl);
+ }
}
+
out:
- mutex_unlock(&dev->device_lock);
+ up_read(&dev->me_clients_rwsem);
ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
kfree(buf);
return ret;
@@ -118,7 +117,7 @@ static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf,
pos += scnprintf(buf + pos, bufsz - pos,
"%2d|%2d|%4d|%5d|%2d|%2d|\n",
i, cl->me_client_id, cl->host_client_id, cl->state,
- cl->reading_state, cl->writing_state);
+ !list_empty(&cl->rd_completed), cl->writing_state);
i++;
}
out: