[PATCH 5.11 187/775] drm: rcar-du: Fix leak of CMM platform device reference
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-03-02 00:36:33
Also in:
lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Linus Torvalds
From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
[ Upstream commit 9fa120458da142da0d1d3eaf6f6a3a2c2c91d27b ]
The device references acquired by of_find_device_by_node() are not
released by the driver. Fix this by registering a cleanup action.
Fixes: 8de707aeb452 ("drm: rcar-du: kms: Initialize CMM instances")
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/rcar-du/rcar_du_kms.c | 22 +++++++++++++++++++---
1 file changed, 19 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
index 7015e22872bbe..ecc894f0bc430 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c@@ -14,6 +14,7 @@ #include <drm/drm_fb_cma_helper.h> #include <drm/drm_gem_cma_helper.h> #include <drm/drm_gem_framebuffer_helper.h> +#include <drm/drm_managed.h> #include <drm/drm_probe_helper.h> #include <drm/drm_vblank.h>
@@ -726,8 +727,12 @@ static int rcar_du_cmm_init(struct rcar_du_device *rcdu) * disabled: return 0 and let the DU continue probing. */ ret = rcar_cmm_init(pdev); - if (ret) + if (ret) { + platform_device_put(pdev); return ret == -ENODEV ? 0 : ret; + } + + rcdu->cmms[i] = pdev; /* * Enforce suspend/resume ordering by making the CMM a provider
@@ -739,13 +744,20 @@ static int rcar_du_cmm_init(struct rcar_du_device *rcdu) "Failed to create device link to CMM%u\n", i); return -EINVAL; } - - rcdu->cmms[i] = pdev; } return 0; } +static void rcar_du_modeset_cleanup(struct drm_device *dev, void *res) +{ + struct rcar_du_device *rcdu = to_rcar_du_device(dev); + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(rcdu->cmms); ++i) + platform_device_put(rcdu->cmms[i]); +} + int rcar_du_modeset_init(struct rcar_du_device *rcdu) { static const unsigned int mmio_offsets[] = {
@@ -766,6 +778,10 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu) if (ret) return ret; + ret = drmm_add_action(&rcdu->ddev, rcar_du_modeset_cleanup, NULL); + if (ret) + return ret; + dev->mode_config.min_width = 0; dev->mode_config.min_height = 0; dev->mode_config.normalize_zpos = true;
--
2.27.0