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SubjectRe: [PATCH] spi: Gracefully handle power supplies with disabled PM
On Mon 2018-09-17 14:10:41, Lubomir Rintel wrote:
> This allows use of SPI when power management is disables, such as on
> early boot;

disabled
boot.

> See also: commit 31eb74318054 ("PM / runtime: Fix handling of suppliers
> with disabled runtime PM")
>
> Cc: Mark Brown <broonie@kernel.org>
> Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>

Plus.. I'm not sure.

I thought you'd cause imbalance between _put and _get, but that one is
probably ok.

On early boot, you probably need to proceed, but is ret == -EACCESS
the right test?
Pavel

> index ec395a6baf9c..6546564e41d0 100644
> --- a/drivers/spi/spi.c
> +++ b/drivers/spi/spi.c
> @@ -1212,7 +1212,7 @@ static void __spi_pump_messages(struct spi_controller *ctlr, bool in_kthread)
>
> if (!was_busy && ctlr->auto_runtime_pm) {
> ret = pm_runtime_get_sync(ctlr->dev.parent);
> - if (ret < 0) {
> + if (ret < 0 && ret != -EACCES) {
> pm_runtime_put_noidle(ctlr->dev.parent);
> dev_err(&ctlr->dev, "Failed to power device: %d\n",
> ret);

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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