6.6-stable review patch. If anyone has any objections, please let me know.
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From: Qi Xi xiqi2@huawei.com
[ Upstream commit 288dac9fb6084330d968459c750c838fd06e10e6 ]
Add missing mutex unlock before returning from the error path in cdns_mhdp_atomic_enable().
Fixes: 935a92a1c400 ("drm: bridge: cdns-mhdp8546: Fix possible null pointer dereference") Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Qi Xi xiqi2@huawei.com Reviewed-by: Luca Ceresoli luca.ceresoli@bootlin.com Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Link: https://lore.kernel.org/r/20250904034447.665427-1-xiqi2@huawei.com Signed-off-by: Luca Ceresoli luca.ceresoli@bootlin.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c index 858f5b6508491..bdb9fc00c776b 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -2057,8 +2057,10 @@ static void cdns_mhdp_atomic_enable(struct drm_bridge *bridge, mhdp_state = to_cdns_mhdp_bridge_state(new_state);
mhdp_state->current_mode = drm_mode_duplicate(bridge->dev, mode); - if (!mhdp_state->current_mode) - return; + if (!mhdp_state->current_mode) { + ret = -EINVAL; + goto out; + }
drm_mode_set_name(mhdp_state->current_mode);