Hi Rafael,

On Tue, Jun 23, 2015 at 1:41 AM, Rafael J. Wysocki [off-list ref] wrote:

On Monday, June 22, 2015 09:31:22 AM Geert Uytterhoeven wrote:

quoted

If pm_genpd_{add,remove}_device() keeps on failing with -EAGAIN, we end
up with an infinite loop in genpd_dev_pm_{at,de}tach().

This may happen due to a genpd.prepared_count imbalance.  This is a bug
elsewhere, but it will result in a system lock up, possibly during
reboot of an otherwise functioning system.

To avoid this, put a limit on the maximum number of loop iterations,
including a simple back-off mechanism.  If the limit is reached, the
operation will just fail.  An error message is already printed.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

This was too late for my first 4.2 pull request, but I may push it in the
second half of the merge window.  Does it depend on anything?

Not that I'm aware of.

It applies fine on v4.1 or next-20150622.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
--
To unsubscribe from this list: send the line "unsubscribe linux-pm" in