On Thursday, April 11, 2013 06:23:52 PM Nishanth Menon wrote:
> Hi,
> On Mon, Apr 8, 2013 at 4:57 AM, Amit Daniel Kachhap
> <amit.daniel@xxxxxxxxxxx> wrote:
> > +
> > +static int init_div_table(void)
> > +{
> > + struct cpufreq_frequency_table *freq_tbl = dvfs_info->freq_table;
> > + unsigned int tmp, clk_div, ema_div, freq, volt_id;
> > + int i = 0;
> > + struct opp *opp;
> > +
> > + for (i = 0; freq_tbl[i].frequency != CPUFREQ_TABLE_END; i++) {
> > +
> > + opp = opp_find_freq_exact(dvfs_info->dev,
> > + freq_tbl[i].frequency * 1000, true);
> > + if (IS_ERR(opp)) {
> > + dev_err(dvfs_info->dev,
> > + "failed to find valid OPP for %u KHZ\n",
> > + freq_tbl[i].frequency);
> > + return PTR_ERR(opp);
> > + }
> please use RCU read locks.
>
> > +
> > + freq = freq_tbl[i].frequency / 1000; /* In MHZ */
> > + clk_div = ((freq / CPU_DIV_FREQ_MAX) & P0_7_CPUCLKDEV_MASK)
> > + << P0_7_CPUCLKDEV_SHIFT;
> > + clk_div |= ((freq / CPU_ATB_FREQ_MAX) & P0_7_ATBCLKDEV_MASK)
> > + << P0_7_ATBCLKDEV_SHIFT;
> > + clk_div |= ((freq / CPU_DBG_FREQ_MAX) & P0_7_CSCLKDEV_MASK)
> > + << P0_7_CSCLKDEV_SHIFT;
> > +
> > + /* Calculate EMA */
> > + volt_id = opp_get_voltage(opp);
> Please use RCU read locks as documented for OPP library.
Argh. I overlooked that and the series has been applied already. Care to send
a fix against linux-pm.git/linux-next?
Rafael
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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