linux-kernel - [PATCH 2/2] drm/ast: Fix connector leak during driver unload

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Message-Id: <3350c5dd5ea08c71e4769ea3801290e7f9238a6c.1541397462.git.sbobroff@linux.ibm.com>
Date:   Mon,  5 Nov 2018 16:57:48 +1100
From:   Sam Bobroff <sbobroff@...ux.ibm.com>
To:     airlied@...hat.com, airlied@...ux.ie,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] drm/ast: Fix connector leak during driver unload

When unloading the ast driver, a warning message is printed by
drm_mode_config_cleanup() because a reference is still held to one of
the drm_connector structs.

Correct this by calling drm_framebuffer_remove() in
ast_fbdev_destroy().

Signed-off-by: Sam Bobroff <sbobroff@...ux.ibm.com>
---
 drivers/gpu/drm/ast/ast_fb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/ast/ast_fb.c b/drivers/gpu/drm/ast/ast_fb.c
index 0cd827e11fa2..655372ea81e9 100644
--- a/drivers/gpu/drm/ast/ast_fb.c
+++ b/drivers/gpu/drm/ast/ast_fb.c
@@ -263,6 +263,10 @@ static void ast_fbdev_destroy(struct drm_device *dev,
 {
 	struct ast_framebuffer *afb = &afbdev->afb;
 
+	/* drm_framebuffer_remove() expects us to hold a ref, which it
+	 * will drop, so take one: */
+	drm_framebuffer_get(&afb->base);
+	drm_framebuffer_remove(&afb->base);
 	drm_fb_helper_unregister_fbi(&afbdev->helper);
 
 	if (afb->obj) {
-- 
2.19.0.2.gcad72f5712