lkml.org 
[lkml]   [2020]   [Jan]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH v2] clk: Warn about critical clks that fail to enable
Date

On Thu 02 Jan 2020 at 01:55, Stephen Boyd <sboyd@kernel.org> wrote:

> If we don't warn here users of the CLK_IS_CRITICAL flag may not know
> that their clk isn't actually enabled because it silently fails to
> enable. Let's print a warning in that case so developers find these
> problems faster.

Thanks Stephen !
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>

>
> Suggested-by: Jerome Brunet <jbrunet@baylibre.com>
> Cc: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
> ---
>
> Changes from v1:
> * Switched to pr_warn and indicated clk name
>
> drivers/clk/clk.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index 772258de2d1f..b03c2be4014b 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -3427,13 +3427,18 @@ static int __clk_core_init(struct clk_core *core)
> unsigned long flags;
>
> ret = clk_core_prepare(core);
> - if (ret)
> + if (ret) {
> + pr_warn("%s: critical clk '%s' failed to prepare\n",
> + __func__, core->name);
> goto out;
> + }
>
> flags = clk_enable_lock();
> ret = clk_core_enable(core);
> clk_enable_unlock(flags);
> if (ret) {
> + pr_warn("%s: critical clk '%s' failed to enable\n",
> + __func__, core->name);
> clk_core_unprepare(core);
> goto out;
> }
>
> base-commit: 12ead77432f2ce32dea797742316d15c5800cb32

\
 
 \ /
  Last update: 2020-01-02 13:48    [W:0.336 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site