From: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
[ 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@xxxxxxxxxxxxxxxx>
Reviewed-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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
