[PATCH 6.18 204/752] power: sequencing: fix missing state_lock in pwrseq_power_on() error path

Sasha Levin
2026-02-28T17:51:01Z

From: Ziyi Guo <n7l8m4@u.northwestern.edu>

[ Upstream commit e1dccb485c2876ac1318f36ccc0155416c633a48 ]

pwrseq_power_on() calls pwrseq_unit_disable() when the
post_enable callback fails. However, this call is outside the
scoped_guard(mutex, &pwrseq->state_lock) block that ends.

pwrseq_unit_disable() has lockdep_assert_held(&pwrseq->state_lock),
which will fail when called from this error path.

Add the scoped_guard block to cover the post_enable callback and its
error handling to ensure the lock is held when pwrseq_unit_disable() is
called.

Signed-off-by: Ziyi Guo <n7l8m4@u.northwestern.edu>
Link: https://patch.msgid.link/20260130182651.1576579-1-n7l8m4@u.northwestern.edu
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/power/sequencing/core.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/power/sequencing/core.c b/drivers/power/sequencing/core.c
index 190564e559885..1fcf0af7cc0bb 100644
--- a/drivers/power/sequencing/core.c
+++ b/drivers/power/sequencing/core.c
@@ -914,8 +914,10 @@ int pwrseq_power_on(struct pwrseq_desc *desc)
if (target->post_enable) {
ret = target->post_enable(pwrseq);
if (ret) {
- pwrseq_unit_disable(pwrseq, unit);
- desc->powered_on = false;
+ scoped_guard(mutex, &pwrseq->state_lock) {
+ pwrseq_unit_disable(pwrseq, unit);
+ desc->powered_on = false;
+ }
}
}

--
2.51.0