From 30ca6365bb4200f55e59bf1ab2a24e65406e9eac Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Thu, 30 May 2024 13:53:12 +0300 Subject: [PATCH] drm/i915: Fix assert on pending async-put power domain work when it requeues itself MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Commit dd839aa857eb ("drm/i915: Fix incorrect assert about pending power domain async-put work") fixed the assert about a pending work dropping a display power reference asynchronously, leading to the drm_WARN_ON(!queue_delayed_work(&power_domains->async_put_work)); warn next time around a power reference was put asynchronously, due to a stale instance of the work still being pending. However the fix didn't consider the case where multiple power reference was acquired and put, requiring the work to requeue itself. Extend the fix for this case as well canceling the pending instance of the work before it requeues itself. Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/10915 Signed-off-by: Imre Deak Reviewed-by: Jouni Högander Link: https://patchwork.freedesktop.org/patch/msgid/20240530105312.1016485-1-imre.deak@intel.com --- drivers/gpu/drm/i915/display/intel_display_power.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index 34b6d843bc9ef..8c49ac053dfb0 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -675,6 +675,12 @@ intel_display_power_put_async_work(struct work_struct *work) release_async_put_domains(power_domains, &power_domains->async_put_domains[0]); + /* + * Cancel the work that got queued after this one got dequeued, + * since here we released the corresponding async-put reference. + */ + cancel_async_put_work(power_domains, false); + /* Requeue the work if more domains were async put meanwhile. */ if (!bitmap_empty(power_domains->async_put_domains[1].bits, POWER_DOMAIN_NUM)) { bitmap_copy(power_domains->async_put_domains[0].bits, @@ -686,12 +692,6 @@ intel_display_power_put_async_work(struct work_struct *work) fetch_and_zero(&new_work_wakeref), power_domains->async_put_next_delay); power_domains->async_put_next_delay = 0; - } else { - /* - * Cancel the work that got queued after this one got dequeued, - * since here we released the corresponding async-put reference. - */ - cancel_async_put_work(power_domains, false); } out_verify: -- 2.39.5