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drm/bridge: cdns-dsi: Return an error pointer on allocation failure

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The drm_bridge_funcs.atomic_reset documentation states that the hook
must return either a valid drm_bridge_state object or an ERR_PTR().

The cdns_dsi_bridge_atomic_reset() callback returns NULL when the
allocation of its state fails, violating this contract.

Return ERR_PTR(-ENOMEM) instead.

Fixes: a53d987756 ("drm/bridge: cdns-dsi: Move DSI mode check to _atomic_check()")
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # imx8mp + sn65dsi84 + bridge hotplug
Link: https://patch.msgid.link/20260619-drm-no-more-bridge-reset-v3-1-ff399263111b@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
This commit is contained in:
Maxime Ripard 2026-06-19 14:24:06 +02:00
parent a80d12eafa
commit 79ac5c68f1
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GPG Key ID: 275FCE19A23DBE76
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
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@ -1015,7 +1015,7 @@ cdns_dsi_bridge_atomic_reset(struct drm_bridge *bridge)
dsi_state = kzalloc_obj(*dsi_state);
if (!dsi_state)
return NULL;
return ERR_PTR(-ENOMEM);
memset(dsi_state, 0, sizeof(*dsi_state));
dsi_state->base.bridge = bridge;