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| author | MyungJoo Ham <myungjoo.ham@samsung.com> | 2015-11-23 15:45:36 +0900 |
|---|---|---|
| committer | MyungJoo Ham <myungjoo.ham@samsung.com> | 2016-01-13 17:30:33 +0900 |
| commit | 34bd322070a41898b032f59a0dfd345627fc1e7e (patch) | |
| tree | cb4d133152595cfff435ff193dee183497f387b8 /drivers/devfreq/devfreq.c | |
| parent | d7df1e464749650056f511e75b3d4e53cfac5d53 (diff) | |
| download | linux-34bd322070a41898b032f59a0dfd345627fc1e7e.tar.bz2 | |
PM / devfreq: Do not show statistics if it's not ready.
Before this patch for a device without statistics support,
$ cat trans_stat
From : To
: time(ms)
Total transitions : 0
$
After this patch applied for such a device,
$ cat trans_stat
Not Supported.
$
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Diffstat (limited to 'drivers/devfreq/devfreq.c')
| -rw-r--r-- | drivers/devfreq/devfreq.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index d36fa2db4d29..984c5e9e7bdd 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -1049,6 +1049,8 @@ static ssize_t trans_stat_show(struct device *dev, if (!devfreq->stop_polling && devfreq_update_status(devfreq, devfreq->previous_freq)) return 0; + if (max_state == 0) + return sprintf(buf, "Not Supported.\n"); len = sprintf(buf, " From : To\n"); len += sprintf(buf + len, " :"); |