From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH] drm/i915: Fix memleak in runtime wakeref tracking
Date: Thu, 27 Jun 2019 18:04:00 +0300 [thread overview]
Message-ID: <20190627150400.916-1-mika.kuoppala@linux.intel.com> (raw)
In-Reply-To: <156164720964.18552.13645135786549877106@skylake-alporthouse-com>
If we untrack wakerefs, the actual count may reach zero.
However the krealloced owners array is still there and
needs to be taken care of. Free the owners unconditionally
to fix the leak.
Fixes: bd780f37a361 ("drm/i915: Track all held rpm wakerefs")
Reported-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Cc: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/intel_runtime_pm.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 502c54428570..8d1aebc3e857 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -221,13 +221,11 @@ __untrack_all_wakerefs(struct intel_runtime_pm_debug *debug,
static void
dump_and_free_wakeref_tracking(struct intel_runtime_pm_debug *debug)
{
- struct drm_printer p;
+ if (debug->count) {
+ struct drm_printer p = drm_debug_printer("i915");
- if (!debug->count)
- return;
-
- p = drm_debug_printer("i915");
- __print_intel_runtime_pm_wakeref(&p, debug);
+ __print_intel_runtime_pm_wakeref(&p, debug);
+ }
kfree(debug->owners);
}
--
2.17.1
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next prev parent reply other threads:[~2019-06-27 15:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-27 14:44 [PATCH 1/1] drm/i915: Fix memleak in runtime wakeref tracking Mika Kuoppala
2019-06-27 14:53 ` Chris Wilson
2019-06-27 15:00 ` Mika Kuoppala
2019-06-27 15:06 ` Imre Deak
2019-06-27 15:04 ` Mika Kuoppala [this message]
2019-06-28 7:38 ` ✗ Fi.CI.BAT: failure for series starting with drm/i915: Fix memleak in runtime wakeref tracking (rev2) Patchwork
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