From: Brian Norris <computersforpeace@gmail.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: linux-pm@vger.kernel.org, Doug Berger <opendmb@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>
Subject: Re: [bug report] thermal: add brcmstb AVS TMON driver
Date: Wed, 6 Sep 2017 10:00:21 -0700 [thread overview]
Message-ID: <20170906170021.GA119185@google.com> (raw)
In-Reply-To: <20170906071522.7wyvtyznp2mdqmd7@mwanda>
On Wed, Sep 06, 2017 at 11:22:42AM +0300, Dan Carpenter wrote:
> Hello Brian Norris,
Hi Dan! Or Dan's robots.
> The patch 1e21c74eda83: "thermal: add brcmstb AVS TMON driver" from
I'll blame Doug or Florian :)
Actually, I'm pretty sure 'low' and 'high' were 'unsigned long' in the
tree where I first wrote this driver (before 'set_trips' was even merged
upstream). We can probably simplify this now.
But I'll leave that to Doug.
Brian
> Aug 9, 2017, leads to the following static checker warning:
>
> drivers/thermal/broadcom/brcmstb_thermal.c:281 brcmstb_set_trips()
> warn: impossible condition '(low > ((~0 >> 1))) => (s32min-s32max > s32max)'
>
> drivers/thermal/broadcom/brcmstb_thermal.c:290 brcmstb_set_trips()
> warn: impossible condition '(high > ((~0 >> 1))) => (s32min-s32max > s32max)'
>
> drivers/thermal/broadcom/brcmstb_thermal.c
> 274 static int brcmstb_set_trips(void *data, int low, int high)
> 275 {
> 276 struct brcmstb_thermal_priv *priv = data;
> 277
> 278 dev_dbg(priv->dev, "set trips %d <--> %d\n", low, high);
> 279
> 280 if (low) {
> 281 if (low > INT_MAX)
> ^^^^^^^^^^^^^
> Never true
>
> 282 low = INT_MAX;
> 283 avs_tmon_set_trip_temp(priv, TMON_TRIP_TYPE_LOW, low);
> 284 avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_LOW, 1);
> 285 } else {
> 286 avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_LOW, 0);
> 287 }
> 288
> 289 if (high < ULONG_MAX) {
> ^^^^^^^^^^^^^^^^
> Always true
>
> 290 if (high > INT_MAX)
> ^^^^^^^^^^^^^^
> Never true
>
> 291 high = INT_MAX;
> 292 avs_tmon_set_trip_temp(priv, TMON_TRIP_TYPE_HIGH, high);
> 293 avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_HIGH, 1);
> 294 } else {
> 295 avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_HIGH, 0);
> 296 }
> 297
> 298 return 0;
> 299 }
>
>
> regards,
> dan carpenter
next prev parent reply other threads:[~2017-09-06 17:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-06 8:22 [bug report] thermal: add brcmstb AVS TMON driver Dan Carpenter
2017-09-06 17:00 ` Brian Norris [this message]
2017-09-06 18:08 ` Florian Fainelli
2017-09-06 18:37 ` Brian Norris
2017-09-06 19:33 ` Doug Berger
2017-09-06 19:46 ` Markus Mayer
2017-09-14 23:19 ` [PATCH] thermal: brcmstb: disable trip points properly when needed Markus Mayer
2017-09-14 23:25 ` Markus Mayer
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