From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EF4B61DE4EF; Sat, 12 Sep 2026 14:12:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789222329; cv=none; b=b1nEi5x0mxtiUeNPAObroQdZuZNL5kuzI28uuBej4+CIKVVfKBcwVAVKcQoUqvpBrpP1CDGLQEJG5ZJUmhs63LWAVj3AjaGU+dMoB5JKfBfMQc0KzUwocbsxj0JZ8Rkd8f9d4qf2+at5Pwje2WIjJMSh6oaPSniZ/R0vl19cr5o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789222329; c=relaxed/simple; bh=pqhh1nVxJKniOEvffZhSihfsyEFUWmJKpMqR6bMIBoM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QX3K3O9xfIURJEtue357+W90cbbOBOdJUF+WELWFgLs/go1GOqcPo1YzWMD486qtoMPZfUHtzX/SikEFXl790sWS24ELJilGg3Bv+B6lUBMnPyXRcgTs87dK5ekpl6mw0DlksFS8ZkJ/1N4WYfVWr1SFK7u29U7Mi2IR4frIsHk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=FISDyDtD; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="FISDyDtD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A8DF71F000FF; Sat, 12 Sep 2026 14:12:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789222327; bh=2wQiLwBoHwr1x05opMB5+B8SV9sfT09tvvixGIxVKqc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=FISDyDtDZXvQeF2j9VAuzUHkyiTtyBrxep7EIg70DiwP7XxWFkzu03/hB9NEnh2/g KCqBCxIa6VLb1aQA93gQGKkXEivqdH79OvB8vBEy+FSeyAiFU6HvB2d0tvf5cuk0no UmuW/Lrl0wrTcJuvK6Wm0eOrHFGOlmOK6Tp6rq88= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thomas Zimmermann , Luca Ceresoli , Maxime Ripard , Sasha Levin Subject: [PATCH 6.6 0564/1424] drm/bridge: cdns-mhdp8546: Return an error pointer on allocation failure Date: Sat, 12 Sep 2026 08:49:56 +0200 Message-ID: <20260912065619.936257368@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.279695368@linuxfoundation.org> References: <20260912065607.279695368@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Maxime Ripard [ Upstream commit 30ac1d403438a6c6039f0af5bb2df3d021f96036 ] 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_mhdp_bridge_atomic_reset() callback returns NULL when the allocation of its state fails, violating this contract. Return ERR_PTR(-ENOMEM) instead. Fixes: fb43aa0acdfd ("drm: bridge: Add support for Cadence MHDP8546 DPI/DP bridge") Reviewed-by: Thomas Zimmermann Reviewed-by: Luca Ceresoli Tested-by: Luca Ceresoli # imx8mp + sn65dsi84 + bridge hotplug Link: https://patch.msgid.link/20260619-drm-no-more-bridge-reset-v3-2-ff399263111b@kernel.org Signed-off-by: Maxime Ripard Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c index 44955601a9dfc..eeefb0fa70d88 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -2161,7 +2161,7 @@ cdns_mhdp_bridge_atomic_reset(struct drm_bridge *bridge) cdns_mhdp_state = kzalloc(sizeof(*cdns_mhdp_state), GFP_KERNEL); if (!cdns_mhdp_state) - return NULL; + return ERR_PTR(-ENOMEM); __drm_atomic_helper_bridge_reset(bridge, &cdns_mhdp_state->base); -- 2.53.0