| Message ID | 1422389625-11730-9-git-send-email-ulf.hansson@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Jan 27, 2015 at 9:13 PM, Ulf Hansson <ulf.hansson@linaro.org> wrote: > When __pm_genpd_add_device() is invoked through the generic OF-based PM > domain look-up path, the device is being probed. Returning an error > will mean the device won't be attached to its PM domain. Errors of > -EPROBE_DEFER get special treatment and is propagated to the driver are propagated > core. 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-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 0fd5ee1..ba4abbe 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -1467,8 +1467,9 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev, goto out; } - if (genpd->attach_dev) - genpd->attach_dev(genpd, dev); + ret = genpd->attach_dev ? genpd->attach_dev(genpd, dev) : 0; + if (ret) + goto out; genpd->device_count++; genpd->max_off_time_changed = true;
The optional genpd's ->attach_dev() callback is invoked from __pm_genpd_add_device(). Let's add error handling from the response from this callback and propagate the error code. When __pm_genpd_add_device() is invoked through the generic OF-based PM domain look-up path, the device is being probed. Returning an error will mean the device won't be attached to its PM domain. Errors of -EPROBE_DEFER get special treatment and is propagated to the driver core. Therefore this change also enables the ->attach_dev() callback to be able to request for a deferred probe sequence. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> --- drivers/base/power/domain.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)