From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 CD95525335F; Wed, 11 Dec 2024 18:53:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733943227; cv=none; b=LCHhPhHJCacANnewQPmDZmqHw4j1XDS2HmQVxc4U0G54gJk9jYkKyVQ9AFJLJv3mv0aQ5ePe7nRMzW9vya7Aav7JiphfwO+4z1fsJFnA5BfEDmNSObF3LYk9IbORd9si4r/C0JxPCeat2Zqn+23Z4P7qYaE024u5CZrzOaUTASY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733943227; c=relaxed/simple; bh=1s1oXBbynOKYRxIx8NkEYOr7+xr9N+ldup6y4maCt6U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sePgqQuuCSfU+THv7Vom42iD2uLfYRhAaba7NcNJaAwBdPpa1nHGwue1HASU/GAUDY2ZENbUdqMq69yk6PibIdhjSWwQCyV+MfZ3e0HegGrZRYU8XROnJYVhi10JSXDocOhZzuFh4OENHMnRBFxjYMVIFN8DfHeUQUnClhI/xYg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kETN8+Jf; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kETN8+Jf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82C42C4CED2; Wed, 11 Dec 2024 18:53:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733943227; bh=1s1oXBbynOKYRxIx8NkEYOr7+xr9N+ldup6y4maCt6U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kETN8+JfnclYCXpEd9SsiTw8Nea19TVvF06/4hZtLJ0kmGA27Q5aXnGdVR3SESOgN 7yCkq3xYIKlB/Yd5mBinOHDmkT3WdkXCafSA8P8w/zCjDonFGxKwUZTrxPfyEWRvhf 0m4em5nZ6oEYJN0fqCHohCxNclUhmQLUEx6vRYfw9CStGt8qf4N4WpI2MYXDMDgDPN 4Y6sNx4+jLt6UojdZL9gkwi0VP9YTTgdBC63K44/RLUDR7PdcCwjY52fxnNOmR9WXX /rQgjpSi5/fKBVEY4qlODqRAgSb6KTyuP+e+CRztnQ9HOUxkkDwz2Y8oAWVnpS54fr QmflKLZTDTkMQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Imre Deak , Lyude Paul , Sasha Levin , maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, jani.nikula@intel.com, harry.wentland@amd.com, alexander.deucher@amd.com, Wayne.Lin@amd.com, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.1 13/15] drm/dp_mst: Reset message rx state after OOM in drm_dp_mst_handle_up_req() Date: Wed, 11 Dec 2024 13:53:05 -0500 Message-ID: <20241211185316.3842543-13-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241211185316.3842543-1-sashal@kernel.org> References: <20241211185316.3842543-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.1.119 Content-Transfer-Encoding: 8bit From: Imre Deak [ Upstream commit 2b245c97b1af5d8f04c359e0826cb5a5c81ef704 ] After an out-of-memory error the reception state should be reset, so that the next attempt receiving a message doesn't fail (due to getting a start-of-message packet, while the reception state has already the start-of-message flag set). Cc: Lyude Paul Reviewed-by: Lyude Paul Signed-off-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/20241203160223.2926014-7-imre.deak@intel.com Signed-off-by: Sasha Levin --- drivers/gpu/drm/display/drm_dp_mst_topology.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c index e677a8eb45a4e..7321dcfb74a9a 100644 --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c @@ -3996,6 +3996,7 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) { struct drm_dp_pending_up_req *up_req; struct drm_dp_mst_branch *mst_primary; + int ret = 0; if (!drm_dp_get_one_sb_msg(mgr, true, NULL)) goto out_clear_reply; @@ -4004,8 +4005,10 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) return 0; up_req = kzalloc(sizeof(*up_req), GFP_KERNEL); - if (!up_req) - return -ENOMEM; + if (!up_req) { + ret = -ENOMEM; + goto out_clear_reply; + } INIT_LIST_HEAD(&up_req->next); @@ -4072,7 +4075,7 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr) drm_dp_mst_topology_put_mstb(mst_primary); out_clear_reply: memset(&mgr->up_req_recv, 0, sizeof(struct drm_dp_sideband_msg_rx)); - return 0; + return ret; } /** -- 2.43.0