linux-kernel - [PATCH AUTOSEL 4.19 59/81] drm/sun4i: Unbind components before releasing DRM and memory

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Date:   Tue,  7 May 2019 01:35:30 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>, Sasha Levin <sashal@...nel.org>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 4.19 59/81] drm/sun4i: Unbind components before releasing DRM and memory

From: Paul Kocialkowski <paul.kocialkowski@...tlin.com>

[ Upstream commit e02bc29b2cfa7806830d6da8b2322cddd67e8dfe ]

Our components may still be using the DRM device driver (if only to
access our driver's private data), so make sure to unbind them before
the final drm_dev_put.

Also release our reserved memory after component unbind instead of
before to match reverse creation order.

Fixes: f5a9ed867c83 ("drm/sun4i: Fix component unbinding and component master deletion")
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Reviewed-by: Chen-Yu Tsai <wens@...e.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190424090413.6918-1-paul.kocialkowski@bootlin.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/sun4i/sun4i_drv.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index 62703630090a..57f61ec4bc6b 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -158,10 +158,11 @@ static void sun4i_drv_unbind(struct device *dev)
 	drm_kms_helper_poll_fini(drm);
 	sun4i_framebuffer_free(drm);
 	drm_mode_config_cleanup(drm);
-	of_reserved_mem_device_release(dev);
-	drm_dev_put(drm);
 
 	component_unbind_all(dev, NULL);
+	of_reserved_mem_device_release(dev);
+
+	drm_dev_put(drm);
 }
 
 static const struct component_master_ops sun4i_drv_master_ops = {
-- 
2.20.1