6.6-stable review patch. If anyone has any objections, please let me know.
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From: Rafael J. Wysocki rafael.j.wysocki@intel.com
commit 359afc8eb02a518fbdd0cbd462c8c2827c6cbec2 upstream.
Commit 89d9cec3b1e9 ("PM: runtime: Clear power.needs_force_resume in pm_runtime_reinit()") added provisional clearing of power.needs_force_resume to pm_runtime_reinit(), but it is done unconditionally which is a mistake because pm_runtime_reinit() may race with driver probing and removal [1].
To address this, notice that power.needs_force_resume should never be set when runtime PM is enabled and so it only needs to be cleared when runtime PM is disabled, and update pm_runtime_init() to only clear that flag when runtime PM is disabled.
Fixes: 89d9cec3b1e9 ("PM: runtime: Clear power.needs_force_resume in pm_runtime_reinit()") Reported-by: Ed Tsai ed.tsai@mediatek.com Closes: https://lore.kernel.org/linux-pm/20251215122154.3180001-1-ed.tsai@mediatek.c... [1] Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Cc: 6.17+ stable@vger.kernel.org # 6.17+ Reviewed-by: Ulf Hansson ulf.hansson@linaro.org Link: https://patch.msgid.link/12807571.O9o76ZdvQC@rafael.j.wysocki Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/base/power/runtime.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-)
--- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -1827,16 +1827,18 @@ void pm_runtime_init(struct device *dev) */ void pm_runtime_reinit(struct device *dev) { - if (!pm_runtime_enabled(dev)) { - if (dev->power.runtime_status == RPM_ACTIVE) - pm_runtime_set_suspended(dev); - if (dev->power.irq_safe) { - spin_lock_irq(&dev->power.lock); - dev->power.irq_safe = 0; - spin_unlock_irq(&dev->power.lock); - if (dev->parent) - pm_runtime_put(dev->parent); - } + if (pm_runtime_enabled(dev)) + return; + + if (dev->power.runtime_status == RPM_ACTIVE) + pm_runtime_set_suspended(dev); + + if (dev->power.irq_safe) { + spin_lock_irq(&dev->power.lock); + dev->power.irq_safe = 0; + spin_unlock_irq(&dev->power.lock); + if (dev->parent) + pm_runtime_put(dev->parent); } /* * Clear power.needs_force_resume in case it has been set by