linux-kernel - [PATCH 3.13 065/187] drm/tilcdc: panel: fix leak when unloading the module

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Message-Id: <1410818997-9432-66-git-send-email-kamal@canonical.com>
Date:	Mon, 15 Sep 2014 15:07:55 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Guido Martínez <guido@...guardiasur.com.ar>,
	Dave Airlie <airlied@...hat.com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 065/187] drm/tilcdc: panel: fix leak when unloading the module

3.13.11.7 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: =?UTF-8?q?Guido=20Mart=C3=ADnez?= <guido@...guardiasur.com.ar>

commit 3a49012224ca9016658a831a327ff6a7fe5bb4f9 upstream.

The driver did not unregister the allocated framebuffer, which caused
memory leaks (and memory manager WARNs) when unloading. Also, the
framebuffer device under /dev still existed after unloading.

Add a call to drm_fbdev_cma_fini when unloading the module to prevent
both issues.

Signed-off-by: Guido Martínez <guido@...guardiasur.com.ar>
Tested-by: Darren Etheridge <detheridge@...com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/gpu/drm/tilcdc/tilcdc_drv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
index 116da19..247ab5d 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -122,6 +122,7 @@ static int tilcdc_unload(struct drm_device *dev)
 	struct tilcdc_drm_private *priv = dev->dev_private;
 	struct tilcdc_module *mod, *cur;
 
+	drm_fbdev_cma_fini(priv->fbdev);
 	drm_kms_helper_poll_fini(dev);
 	drm_mode_config_cleanup(dev);
 	drm_vblank_cleanup(dev);
-- 
1.9.1

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