Messages in this thread Patch in this message | | | From | Peng Fan <> | Subject | [RFC] platform: detach from PM domains on shutdown | Date | Tue, 15 May 2018 17:01:10 +0800 |
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When reboot Linux, the PM domains attached to a device are not shutdown. To SoCs which relys on reset the whole SoC, there is no need to shutdown PM domains, but to Linux running in a virtual machine with devices pass-through, we could not reset the whole SoC. Currently we need Linux to shutdown its PM domains when reboot.
commit 2d30bb0b3889 ("platform: Do not detach from PM domains on shutdown"), removes what this patch tries to add, because of a warning. commit e79aee49bcf9 ("PM: Avoid false-positive warnings in dev_pm_domain_set()") already fixes the false alarm warning. So let's detach the power domain to shutdown PM domains after driver shutdown.
Signed-off-by: Peng Fan <peng.fan@nxp.com> ---
I do not find a better place to shutdown power domain when reboot Linux, so add back the line that commit 2d30bb0b3889 removes, because it is a false alarm warning as commit e79aee49bcf9 describes.
drivers/base/platform.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 8075ddc70a17..a5929f24dc3c 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -616,6 +616,7 @@ static void platform_drv_shutdown(struct device *_dev) if (drv->shutdown) drv->shutdown(dev); + dev_pm_domain_detach(_dev, true); } /** -- 2.14.1
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