Nishanth Menon <nm@xxxxxx> writes:
> OPP functions as described in Documentation/power/opp.txt
> should be accessed under rcu_locks.
>
> Signed-off-by: Nishanth Menon <nm@xxxxxx>
This looks like a fix needed in mainline.
Please send as a standalone patch against mainline and Cc
linux-arm-kernel.
Thanks,
Kevin
> ---
> arch/arm/mach-omap2/pm.c | 3 +++
> 1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c
> index d085f29..7355347 100644
> --- a/arch/arm/mach-omap2/pm.c
> +++ b/arch/arm/mach-omap2/pm.c
> @@ -198,14 +198,17 @@ static int __init omap2_set_init_voltage(char *vdd_name, char *clk_name,
> freq = clk->rate;
> clk_put(clk);
>
> + rcu_read_lock();
> opp = opp_find_freq_ceil(dev, &freq);
> if (IS_ERR(opp)) {
> + rcu_read_unlock();
> printk(KERN_ERR "%s: unable to find boot up OPP for vdd_%s\n",
> __func__, vdd_name);
> goto exit;
> }
>
> bootup_volt = opp_get_voltage(opp);
> + rcu_read_unlock();
> if (!bootup_volt) {
> printk(KERN_ERR "%s: unable to find voltage corresponding"
> "to the bootup OPP for vdd_%s\n", __func__, vdd_name);
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