Hi Marc,

On Wed, Feb 07, 2018 at 08:57:27AM +0000, Marc Zyngier wrote:

On 07/02/18 01:41, Derek Basehore wrote:

quoted

If cpu_cluster_pm_enter() fails, cpu_pm_exit() should be called. This
will put the CPU in the correct state to resume from the failure.

Signed-off-by: Derek Basehore <redacted>
---
 kernel/cpu_pm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/cpu_pm.c b/kernel/cpu_pm.c
index 67b02e138a47..03bcc0751a51 100644
--- a/kernel/cpu_pm.c
+++ b/kernel/cpu_pm.c

@@ -186,6 +186,9 @@ static int cpu_pm_suspend(void)
 		return ret;
 
 	ret = cpu_cluster_pm_enter();
+	if (ret)
+		cpu_pm_exit();
+
 	return ret;
 }
 

It is unclear to me why we need this patch as part of the ITS series. I
probably fixes something for you, but I don't see the connection with
the other patches.

Ths bug was noticed (by inspection) along with earlier versions of this
series, when Derek was still adding new cpu_pm callbacks, and new
failure modes within the existing callbacks. It's a proper fix to my
knowledge, but I believe it no longer has any particular relevance to
this series, since we're not really touching cpu_pm in this series any
more.

Brian