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 7693F35C6B2; Sat, 12 Sep 2026 09:39:29 +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=1789205970; cv=none; b=bdmm92b2hjo29GeHUEP5pJIzrJhKfxOS+ezZbJfbVD0w2fSHCUS0swpKs7Z4k/wxzUHFRlhzcpeIIcC4OhTsf407wed9WiXl5yUWPcyXVHl4v4dacLSlzy6ilo4fa3AxDZBO2Rm5AUM2nkOtcn1/9ILXp4//CHRLXdcDXGgSoVg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789205970; c=relaxed/simple; bh=Wg1qn27Z3ATAAWfJ+pGo6AR4vefScH7Yrm9AhNeYoY0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BpB3eRihMQYhLDxsSA2Q0L6Om3av3SdB8VBYYaigtm0/Alh5QgK8cn0h8Pgv74dPVDmXZAyOMc66zyh0zqOxtkF316GanSGJ9cisApXxMdH9TPE3eUOT1l8nnfg6VPyTbtblEYRBgrvjD+kVBrDghHArH/ZAe2Gmow1UpDZ57dk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=q+xTDi28; 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="q+xTDi28" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ADFB31F000FF; Sat, 12 Sep 2026 09:39:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789205969; bh=IEclaRR9+NTj21Sdc3y6Ht6sBbmzl/ddPhT2Ksp1EZs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=q+xTDi28I0ffj5nkKQXoUiZvjVBQ7VpGD2eHVp6Bu1520Q+rNTnj6FkX0z7IBAY0l N8eTIoYgrPPfbOm94dPj5I23UY4XXFDZZhriGDnh3uNj6NdJclXiGP0xtVvI71iquY mP10g5LUt7F+qI8qHZgtiFIGWlXxwyZ8CdILu3rI= 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 6.18 0110/1518] drm/bridge: cdns-mhdp8546: Return an error pointer on allocation failure Date: Sat, 12 Sep 2026 08:37:59 +0200 Message-ID: <20260912065625.966061120@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065623.398859879@linuxfoundation.org> References: <20260912065623.398859879@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 6.18-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 7ee19b7cc92fc..f81db7da711d2 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -2088,7 +2088,7 @@ 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