[PATCH 28/51] drm/bochs: Drop explicit drm_mode_config_cleanup

From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: DRI Development <dri-devel@lists.freedesktop.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
	Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
	virtualization@lists.linux-foundation.org,
	Gerd Hoffmann <kraxel@redhat.com>,
	Daniel Vetter <daniel.vetter@intel.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Subject: [PATCH 28/51] drm/bochs: Drop explicit drm_mode_config_cleanup
Date: Fri, 21 Feb 2020 22:02:56 +0100	[thread overview]
Message-ID: <20200221210319.2245170-29-daniel.vetter@ffwll.ch> (raw)
In-Reply-To: <20200221210319.2245170-1-daniel.vetter@ffwll.ch>

Instead rely on the automatic clean, for which we just need to check
that drm_mode_config_init succeeded. To avoid an inversion in the
cleanup we also have to move the dev_private allocation over to
drmm_kzalloc.

This is made possible by a preceeding patch which added a drmm_
cleanup action to drm_mode_config_init(), hence all we need to do to
ensure that drm_mode_config_cleanup() is run on final drm_device
cleanup is check the new error code for _init().

v2: Explain why this cleanup is possible (Laurent).

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: virtualization@lists.linux-foundation.org
---
 drivers/gpu/drm/bochs/bochs.h     |  1 -
 drivers/gpu/drm/bochs/bochs_drv.c |  6 ++----
 drivers/gpu/drm/bochs/bochs_kms.c | 14 +++++---------
 3 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/bochs/bochs.h b/drivers/gpu/drm/bochs/bochs.h
index 917767173ee6..e5bd1d517a18 100644
--- a/drivers/gpu/drm/bochs/bochs.h
+++ b/drivers/gpu/drm/bochs/bochs.h
@@ -92,7 +92,6 @@ void bochs_mm_fini(struct bochs_device *bochs);
 
 /* bochs_kms.c */
 int bochs_kms_init(struct bochs_device *bochs);
-void bochs_kms_fini(struct bochs_device *bochs);
 
 /* bochs_fbdev.c */
 extern const struct drm_mode_config_funcs bochs_mode_funcs;
diff --git a/drivers/gpu/drm/bochs/bochs_drv.c b/drivers/gpu/drm/bochs/bochs_drv.c
index addb0568c1af..e18c51de1196 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -7,6 +7,7 @@
 
 #include <drm/drm_drv.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_managed.h>
 
 #include "bochs.h"
 
@@ -21,10 +22,7 @@ static void bochs_unload(struct drm_device *dev)
 {
 	struct bochs_device *bochs = dev->dev_private;
 
-	bochs_kms_fini(bochs);
 	bochs_mm_fini(bochs);
-	kfree(bochs);
-	dev->dev_private = NULL;
 }
 
 static int bochs_load(struct drm_device *dev)
@@ -32,7 +30,7 @@ static int bochs_load(struct drm_device *dev)
 	struct bochs_device *bochs;
 	int ret;
 
-	bochs = kzalloc(sizeof(*bochs), GFP_KERNEL);
+	bochs = drmm_kzalloc(dev, sizeof(*bochs), GFP_KERNEL);
 	if (bochs == NULL)
 		return -ENOMEM;
 	dev->dev_private = bochs;
diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c
index e8cc8156d773..8285c03a6a95 100644
--- a/drivers/gpu/drm/bochs/bochs_kms.c
+++ b/drivers/gpu/drm/bochs/bochs_kms.c
@@ -134,7 +134,11 @@ const struct drm_mode_config_funcs bochs_mode_funcs = {
 
 int bochs_kms_init(struct bochs_device *bochs)
 {
-	drm_mode_config_init(bochs->dev);
+	int ret;
+
+	ret = drm_mode_config_init(bochs->dev);
+	if (ret)
+		return ret;
 
 	bochs->dev->mode_config.max_width = 8192;
 	bochs->dev->mode_config.max_height = 8192;
@@ -160,11 +164,3 @@ int bochs_kms_init(struct bochs_device *bochs)
 
 	return 0;
 }
-
-void bochs_kms_fini(struct bochs_device *bochs)
-{
-	if (!bochs->dev->mode_config.num_connector)
-		return;
-
-	drm_mode_config_cleanup(bochs->dev);
-}
-- 
2.24.1

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