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 86FAA3B813A; Sat, 12 Sep 2026 07:07:52 +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=1789196873; cv=none; b=HvjubA2FHkUBQbMtkYHHEY6HRWsjGoU6rGSHdhozjzB/LHyIeHl86K+xJvq2uSv2Qk0mrflPnlBjfltzPH+Pona9PcvY/zh6E+h/jEded801QLNIMByFziwGs67yoJEJoztE2M7V+MBXQdhoFwEv5s+rdNUzmMZJAO3B3hCIgBE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789196873; c=relaxed/simple; bh=4pM4OmVZI0AXPgVH8mnEXVz1m9P9OYLYsYBynvJ1Bxo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nQKEtPpedcZyIHB8qHHFg07bR89KRUK3RJP7Pcf7p0tDzScOJU/IBEzb1YWOfKwdeU/hQPjlCGnZ5qFUwspx4AsACMyIXM4RxdBhXPBFwyBGfYK1oRCtQQVmuBNBaZECLY0V+/FIA19ISlIZ3FLLRqCz2rsD2gy8cxvOko2vlkE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=oKoNBw1J; 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="oKoNBw1J" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 20AF01F000FF; Sat, 12 Sep 2026 07:07:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789196872; bh=JXrc1kIq9Wl5NLIJGUVFOKwj3sc+az3V1BQHEz07yUE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=oKoNBw1JXtN98IoUgaV+Wx9MorrQOIyMLMctf1IAfbjr7tomGoH2flzrrLqC84G0X Nvq4Xi5kFyab3NQIxOmnQumZIw+UvRENGTmPyhBAb2Ow/EGChkgySvjsb3M3skNGU/ vatXinJJlWpILXKfYO9/48THPbQcwBBen3BrP2sk= 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 7.2 0055/1815] drm/bridge: cdns-mhdp8546: Return an error pointer on allocation failure Date: Sat, 12 Sep 2026 08:30:05 +0200 Message-ID: <20260912065650.307318321@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065648.999753832@linuxfoundation.org> References: <20260912065648.999753832@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 7.2-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 36c07b71fe04b..46779b49545bd 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -1927,7 +1927,7 @@ cdns_mhdp_bridge_atomic_reset(struct drm_bridge *bridge) cdns_mhdp_state = kzalloc_obj(*cdns_mhdp_state); if (!cdns_mhdp_state) - return NULL; + return ERR_PTR(-ENOMEM); __drm_atomic_helper_bridge_reset(bridge, &cdns_mhdp_state->base); -- 2.53.0