2015-02-04 07:44:16

by Nicholas Mc Guire

[permalink] [raw]
Subject: [PATCH] cw1200: use msecs_to_jiffies for conversion

This is only an API consolidation to make things more readable.
Instances of HZ / CONST are replaced by appropriate msecs_to_jiffies().

Signed-off-by: Nicholas Mc Guire <[email protected]>
---

Converting milliseconds to jiffies by "val * HZ / 1000" or passing
HZ / 10 is technically OK but appropriate msecs_to_jiffies(val), respectively
msecs_to_jiffies(100) is the cleaner solution and handles all corner cases
correctly. This is a minor API cleanup only.

Patch was only compile tested for x86_64_defconfig + CONFIG_CW1200=m

Patch is against 3.19.0-rc7 (localversion-next = -next-20150203)

drivers/net/wireless/cw1200/scan.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/cw1200/scan.c b/drivers/net/wireless/cw1200/scan.c
index f2e276f..bff81b8 100644
--- a/drivers/net/wireless/cw1200/scan.c
+++ b/drivers/net/wireless/cw1200/scan.c
@@ -39,9 +39,9 @@ static int cw1200_scan_start(struct cw1200_common *priv, struct wsm_scan *scan)
cancel_delayed_work_sync(&priv->clear_recent_scan_work);
atomic_set(&priv->scan.in_progress, 1);
atomic_set(&priv->recent_scan, 1);
- cw1200_pm_stay_awake(&priv->pm_state, tmo * HZ / 1000);
+ cw1200_pm_stay_awake(&priv->pm_state, msecs_to_jiffies(tmo));
queue_delayed_work(priv->workqueue, &priv->scan.timeout,
- tmo * HZ / 1000);
+ msecs_to_jiffies(tmo));
ret = wsm_scan(priv, scan);
if (ret) {
atomic_set(&priv->scan.in_progress, 0);
@@ -386,8 +386,8 @@ void cw1200_probe_work(struct work_struct *work)
if (down_trylock(&priv->scan.lock)) {
/* Scan is already in progress. Requeue self. */
schedule();
- queue_delayed_work(priv->workqueue,
- &priv->scan.probe_work, HZ / 10);
+ queue_delayed_work(priv->workqueue, &priv->scan.probe_work,
+ msecs_to_jiffies(100));
mutex_unlock(&priv->conf_mutex);
return;
}
--
1.7.10.4


2015-02-06 06:43:41

by Kalle Valo

[permalink] [raw]
Subject: Re: cw1200: use msecs_to_jiffies for conversion


> This is only an API consolidation to make things more readable.
> Instances of HZ / CONST are replaced by appropriate msecs_to_jiffies().
>
> Signed-off-by: Nicholas Mc Guire <[email protected]>

Thanks, applied to wireless-drivers-next.git.

Kalle Valo