diff options
| author | Biju Das <biju.das.jz@bp.renesas.com> | 2025-02-05 11:21:35 +0000 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2025-05-07 18:06:14 +0200 |
| commit | 3c3642335065c3bde0742b0edc505b6ea8fdc2b3 (patch) | |
| tree | f3336c2d664043ce902f1bc9a1fc429125d1727b | |
| parent | 33ca5aafc3592a27375cf7a249cf162c90f5e653 (diff) | |
drm/tegra: rgb: Fix the unbound reference count
The of_get_child_by_name() increments the refcount in tegra_dc_rgb_probe,
but the driver does not decrement the refcount during unbind. Fix the
unbound reference count using devm_add_action_or_reset() helper.
Fixes: d8f4a9eda006 ("drm: Add NVIDIA Tegra20 support")
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20250205112137.36055-1-biju.das.jz@bp.renesas.com
| -rw-r--r-- | drivers/gpu/drm/tegra/rgb.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c index 1e8ec50b759e..ff5a749710db 100644 --- a/drivers/gpu/drm/tegra/rgb.c +++ b/drivers/gpu/drm/tegra/rgb.c @@ -200,6 +200,11 @@ static const struct drm_encoder_helper_funcs tegra_rgb_encoder_helper_funcs = { .atomic_check = tegra_rgb_encoder_atomic_check, }; +static void tegra_dc_of_node_put(void *data) +{ + of_node_put(data); +} + int tegra_dc_rgb_probe(struct tegra_dc *dc) { struct device_node *np; @@ -207,7 +212,14 @@ int tegra_dc_rgb_probe(struct tegra_dc *dc) int err; np = of_get_child_by_name(dc->dev->of_node, "rgb"); - if (!np || !of_device_is_available(np)) + if (!np) + return -ENODEV; + + err = devm_add_action_or_reset(dc->dev, tegra_dc_of_node_put, np); + if (err < 0) + return err; + + if (!of_device_is_available(np)) return -ENODEV; rgb = devm_kzalloc(dc->dev, sizeof(*rgb), GFP_KERNEL); |