linux-kernel - [PATCH v2 6/6] drm/vkms: Add missing check for CRTC initialization

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Message-Id: <20240827-google-vkms-managed-v2-6-f41104553aeb@bootlin.com>
Date: Tue, 27 Aug 2024 11:57:41 +0200
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>, 
 Melissa Wen <melissa.srw@...il.com>, 
 Maíra Canal <mairacanal@...eup.net>, 
 Haneen Mohammed <hamohammed.sa@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>
Cc: dri-devel@...ts.freedesktop.org, arthurgrillo@...eup.net, 
 linux-kernel@...r.kernel.org, jeremie.dautheribes@...tlin.com, 
 miquel.raynal@...tlin.com, thomas.petazzoni@...tlin.com, 
 seanpaul@...gle.com, nicolejadeyee@...gle.com, 
 Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH v2 6/6] drm/vkms: Add missing check for CRTC initialization

CRTC initialization call drm_mode_crtc_set_gamma_size without the proper
checks, introduce this check.

Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
 drivers/gpu/drm/vkms/vkms_crtc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
index ff55099c86ce..39802c928bdf 100644
--- a/drivers/gpu/drm/vkms/vkms_crtc.c
+++ b/drivers/gpu/drm/vkms/vkms_crtc.c
@@ -293,7 +293,12 @@ struct vkms_crtc *vkms_crtc_init(struct vkms_device *vkmsdev, struct drm_plane *
 	}
 	drm_crtc_helper_add(&vkms_crtc->base, &vkms_crtc_helper_funcs);
 
-	drm_mode_crtc_set_gamma_size(&vkms_crtc->base, VKMS_LUT_SIZE);
+	ret = drm_mode_crtc_set_gamma_size(&vkms_crtc->base, VKMS_LUT_SIZE);
+	if (ret) {
+		DRM_DEV_ERROR(vkmsdev->drm.dev, "Failed to set gamma size\n");
+		return ERR_PTR(ret);
+	}
+
 	drm_crtc_enable_color_mgmt(&vkms_crtc->base, 0, false, VKMS_LUT_SIZE);
 
 	spin_lock_init(&vkms_crtc->lock);

-- 
2.44.2