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Date: Wed, 2 Sep 2009 00:10:03 +0200
Message-ID: <63386a3d0909011510s42c5fc38j753aa0219f678d3a@mail.gmail.com>
Subject: Re: [PATCH 1/2] AB3100 regulator support v2
From: Linus Walleij <linus.ml.walleij@gmail.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>,
       Linus Walleij <linus.walleij@stericsson.com>,
       Liam Girdwood <lrg@slimlogic.co.uk>,
       Samuel Ortiz <sameo@linux.intel.com>, linux-kernel@vger.kernel.org
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2009/9/2 Linus Walleij <linus.ml.walleij@gmail.com>:

[SIGKILL]
> In the general sense perhaps this doesn't happen so much,
> what we've seen is system shut down, here some code get
> interrupted by signals, so atleast the shut down path should be
> protected I guess, I will do that in the U300 board setup
> pm_poweroff() hook then, which calls down the
> regulator/ab3100/i2c chain so all that is secured.

Or rather, I already do (I forgot about adding in that code!)

+ */
+void u300_pm_poweroff(void)
+{
+       sigset_t old, all;
+
+       sigfillset(&all);
+       if (!sigprocmask(SIG_BLOCK, &all, &old)) {
+               /* Disable LDO D to shut down the system */
+               if (main_power_15)
+                       regulator_disable(main_power_15);
+               else
+                       pr_err("regulator not available to shut down system\n");
+               (void) sigprocmask(SIG_SETMASK, &old, NULL);
+       }
+       return;
+}

Linus Walleij
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