From nobody Mon Jun 29 07:27:43 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CB97DC433EF for ; Mon, 14 Feb 2022 15:33:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355884AbiBNPdP (ORCPT ); Mon, 14 Feb 2022 10:33:15 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:54542 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352973AbiBNPdN (ORCPT ); Mon, 14 Feb 2022 10:33:13 -0500 Received: from mail-lf1-x12d.google.com (mail-lf1-x12d.google.com [IPv6:2a00:1450:4864:20::12d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B99BE47567; Mon, 14 Feb 2022 07:33:02 -0800 (PST) Received: by mail-lf1-x12d.google.com with SMTP id u6so31381386lfc.3; Mon, 14 Feb 2022 07:33:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=V+BZ9l4nxYyVbWiP19qpOCcVdcferaufovGSXxHYlGM=; b=fMdJoRgwwpjfoOvUZWdzrXKf5lxk21do/fH8LT7Zkd2hgMr8pzwp6GP6P6RKv5E9Rv OyVbOZl5n45vgkdiyVUKKjCv1+pik/MMCpG5Pic7UvibFUpldwMdZlUqAnG+S4FffeLa 7o+jpSbWcUZW/YhpmzlKM/VJ25OJHWsx1yq6/uVXx4COHLUXEDiQre0tAQimanWnl32N bUX7GakS10z76tePFL5B+UaRlU0QapIXKJoFarJa8Dmsuh8An1GbMksrRDKl4lTWIiA0 0FJYZIl+vtOX5JIxbBJ9cOkZABLDV0r38wnb/mXDNNEm3s0p3emwYKVl0lXbcdbs9i/y QcxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=V+BZ9l4nxYyVbWiP19qpOCcVdcferaufovGSXxHYlGM=; b=SsroewCTNOm0kOlIsNAqMdUOuSVOP9nYF6jBCQ4RgLpMwi6hxhKD/y3Qub8ijanOb1 L5o2AyNXOa/GQO4j9006g4rFAIjn7s681DElKyNiIKS6uR+DlUX4NOFodiCwfGzsoCg6 G4qXncsIEV03TfC6utbBxVDTNF3yskgnyQ78+kOq8xjZ6bFps0X6wKpyQVvkGvBTpfjp lz/IFgzhkiR6JGS0hM4kfihbC3yFEYQLmVkm7UClr+ZjZwnhDuDz5C1VOakAFfWPDhuE GkR/kRsnBHwVW5n5X1MXZOj5k6Mb5n+jJTPtY2Bh/uQ2M0TLJnFpnicWrXWNn3Pz3Vdo xRaw== X-Gm-Message-State: AOAM531iZtsUWp/e/GwfGN+j0OTP5yuLQRWnmVa4ntLzHDUibbyAPOeL ZVnBb4AeqJGBVpYi5DzbHqxYwEzU56j1yw== X-Google-Smtp-Source: ABdhPJxQxoPfNXjl+WJ2hdTaOjuAOkK2pKeBqFw4r/OHj5wqqE3XWfTUozKbQV5BvC2MlwwiswWH/A== X-Received: by 2002:ac2:4c50:: with SMTP id o16mr162186lfk.114.1644852781002; Mon, 14 Feb 2022 07:33:01 -0800 (PST) Received: from localhost ([193.209.96.43]) by smtp.gmail.com with ESMTPSA id bp3sm4161693lfb.53.2022.02.14.07.32.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Feb 2022 07:33:00 -0800 (PST) From: Thierry Reding To: Jassi Brar Cc: Jon Hunter , Mikko Perttunen , Pekka Pessi , linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] mailbox: tegra-hsp: Flush whole channel Date: Mon, 14 Feb 2022 16:32:56 +0100 Message-Id: <20220214153256.162261-1-thierry.reding@gmail.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Pekka Pessi The txdone can re-fill the mailbox. Keep polling the mailbox during the flush until all the messages have been delivered. Signed-off-by: Pekka Pessi Signed-off-by: Thierry Reding Tested-by: Jon Hunter --- drivers/mailbox/tegra-hsp.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/mailbox/tegra-hsp.c b/drivers/mailbox/tegra-hsp.c index acd0675da681..78f7265039c6 100644 --- a/drivers/mailbox/tegra-hsp.c +++ b/drivers/mailbox/tegra-hsp.c @@ -412,6 +412,11 @@ static int tegra_hsp_mailbox_flush(struct mbox_chan *c= han, value =3D tegra_hsp_channel_readl(ch, HSP_SM_SHRD_MBOX); if ((value & HSP_SM_SHRD_MBOX_FULL) =3D=3D 0) { mbox_chan_txdone(chan, 0); + + /* Wait until channel is empty */ + if (chan->active_req !=3D NULL) + continue; + return 0; } =20 --=20 2.35.1