On 01/03/2021 17:45, Rafael J. Wysocki wrote:

On Wed, Feb 24, 2021 at 7:30 PM Daniel Lezcano
[off-list ref] wrote:

quoted

The root node is not set to NULL when the dtpm root node is
removed. Consequently, it is not possible to create a new root as it
is already set.

Set the root node to NULL when the last node is removed.

Signed-off-by: Daniel Lezcano <redacted>
---
 drivers/powercap/dtpm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/powercap/dtpm.c b/drivers/powercap/dtpm.c
index 5a51cd34a7e8..c2185ec5f887 100644
--- a/drivers/powercap/dtpm.c
+++ b/drivers/powercap/dtpm.c

@@ -207,6 +207,9 @@ int dtpm_release_zone(struct powercap_zone *pcz)
        if (dtpm->ops)
                dtpm->ops->release(dtpm);

+       if (root == dtpm)
+               root = NULL;
+
        kfree(dtpm);

        return 0;
--

Applied along with the [2/2[ as 5.12-rc material, thanks!

Thanks


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