linux-kernel - [PATCH v4 3/4] drm/vc4: Check for the binner bo before handling OOM interrupt

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Message-Id: <20190403154856.9470-4-paul.kocialkowski@bootlin.com>
Date:   Wed,  3 Apr 2019 17:48:55 +0200
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     Eric Anholt <eric@...olt.net>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Eben Upton <eben@...pberrypi.org>,
        Daniel Stone <daniel@...ishbar.org>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Subject: [PATCH v4 3/4] drm/vc4: Check for the binner bo before handling OOM interrupt

Since the OOM interrupt directly deals with the binner bo, it doesn't
make sense to try and handle it without a binner buffer registered.
The interrupt will kick again in due time, so we can safely ignore it
without a binner bo allocated.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
---
 drivers/gpu/drm/vc4/vc4_irq.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/vc4/vc4_irq.c b/drivers/gpu/drm/vc4/vc4_irq.c
index ffd0a4388752..723dc86b4511 100644
--- a/drivers/gpu/drm/vc4/vc4_irq.c
+++ b/drivers/gpu/drm/vc4/vc4_irq.c
@@ -64,6 +64,9 @@ vc4_overflow_mem_work(struct work_struct *work)
 	struct vc4_exec_info *exec;
 	unsigned long irqflags;
 
+	if (!bo)
+		return;
+
 	bin_bo_slot = vc4_v3d_get_bin_slot(vc4);
 	if (bin_bo_slot < 0) {
 		DRM_ERROR("Couldn't allocate binner overflow mem\n");
-- 
2.21.0