On 09/10, Thierry Reding wrote:
>
> Signed-off-by: Thierry Reding <[email protected]>
Fixes: ?
> ---
> drivers/clk/tegra/clk-dfll.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/clk/tegra/clk-dfll.c b/drivers/clk/tegra/clk-dfll.c
> index aa026bcf5b00..8e25bd52da8c 100644
> --- a/drivers/clk/tegra/clk-dfll.c
> +++ b/drivers/clk/tegra/clk-dfll.c
> @@ -632,11 +632,15 @@ static int find_lut_index_for_rate(struct tegra_dfll
> *td, unsigned long rate)
> struct dev_pm_opp *opp;
> int i, uv;
>
> + rcu_read_lock();
> +
> opp = dev_pm_opp_find_freq_ceil(td->soc->dev, &rate);
> if (IS_ERR(opp))
> return PTR_ERR(opp);
> uv = dev_pm_opp_get_voltage(opp);
>
> + rcu_read_unlock();
> +
> for (i = 0; i < td->i2c_lut_size; i++) {
> if (regulator_list_voltage(td->vdd_reg, td->i2c_lut[i]) == uv)
> return i;
> @@ -1450,6 +1454,8 @@ static int dfll_build_i2c_lut(struct tegra_dfll *td)
> td->i2c_lut[0] = lut;
>
> for (j = 1, rate = 0; ; rate++) {
> + rcu_read_lock();
Don't we already have an rcu_read_lock() at the beginning of this
function? I don't understand why we need to nest them in the same
function.
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