Re: [PATCH v10 2/8] opp: Allow dev_pm_opp_set_clkname() to replace released clock

Viresh Kumar
2021-09-01T04:42:41Z

On 31-08-21, 16:54, Dmitry Osipenko wrote:
> The opp_table->clk is set to error once clock is released by
> dev_pm_opp_put_clkname(). This doesn't allow to set clock again,

I am not sure why are you required to set the clk again here ? I mean,
users aren't expected to put clkname in the middle of using it. The
set-name API also checks that the OPP list should be empty in such a
case.

> until OPP table is re-created from scratch. Check opp_table->clk
> for both NULL and ERR_PTR to allow the clock's replacement.
>
> Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
> ---
> drivers/opp/core.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/opp/core.c b/drivers/opp/core.c
> index dde8a5cc948c..602e502d092e 100644
> --- a/drivers/opp/core.c
> +++ b/drivers/opp/core.c
> @@ -2146,7 +2146,7 @@ struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name)
> }
>
> /* clk shouldn't be initialized at this point */
> - if (WARN_ON(opp_table->clk)) {
> + if (WARN_ON(!IS_ERR_OR_NULL(opp_table->clk))) {
> ret = -EBUSY;
> goto err;
> }
> --
> 2.32.0

--
viresh