From mboxrd@z Thu Jan 1 00:00:00 1970 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 C38C7C77B7A for ; Tue, 6 Jun 2023 23:14:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240211AbjFFXOQ (ORCPT ); Tue, 6 Jun 2023 19:14:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48644 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240226AbjFFXOL (ORCPT ); Tue, 6 Jun 2023 19:14:11 -0400 Received: from mail-qk1-x733.google.com (mail-qk1-x733.google.com [IPv6:2607:f8b0:4864:20::733]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 226B4198D for ; Tue, 6 Jun 2023 16:14:10 -0700 (PDT) Received: by mail-qk1-x733.google.com with SMTP id af79cd13be357-75ec541f933so2291085a.0 for ; Tue, 06 Jun 2023 16:14:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1686093249; x=1688685249; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=+Uxe4ngKTvNFW992508pPtOKsthsuCTTWurBQad88ro=; b=ERkLD+l8LfwszLrjOzufekft3SVcHOEFFyLMDpWXb736gVGi0xS5MNgOShmMuCmGe6 +FSyd89WVYXVGgF707pZg42DoXS7zErvPNwDcsMtjdG+OPH/Be0MVqyROkSrYO0vjqh9 E7Qk1kM+mv11FI6e3p9tZwTsaTIx2x3hgJqkI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686093249; x=1688685249; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=+Uxe4ngKTvNFW992508pPtOKsthsuCTTWurBQad88ro=; b=c4RT9a8oM9LhkqAcPcLH+QtZhVGRYDHnvv45iywGLJhHaEVhRFGE8fzgZlLkEYzXzw HzBu4Xli7Y2CYDUftM+vJTqhh6R6C6Hri6P0yq08rrgY2ux/CWARI0oF48JOeD1W1A96 EBnB+MNxNVWIq1h7duMWI2axcQrivOOHvF0Wnpr8t5FdUgOkCylbWM1hl8yzYx3N4jQ+ iVtJA5ZC0VFb62jlOoTWsRDKFit2wQ1tCKZg6K5wuhPO2KZetwWCYBIfkEo9Jz7NyxCl 4Wi0V/hKoKiFhAGoiVGsrNf+ylkTJCuR4AIvh6IYG9WxeXxEOFxrz8bOfrLX6a17HLS7 Xs7A== X-Gm-Message-State: AC+VfDz2AvGfKh7rNR4hmDSuZpizvlxyGIkAtQXJsETkO9ZboejbhAp4 uZtHxbm5/WhtsvSNGuFHhOtpqA== X-Google-Smtp-Source: ACHHUZ79wjt9rTqt4QZtEV5LWw/NgzV7fzn4PM1e7DeOiA1bfULBRCNghnKi7wo67EnwLgMmEzZVBA== X-Received: by 2002:a05:620a:3a41:b0:75e:ca48:51c8 with SMTP id sk1-20020a05620a3a4100b0075eca4851c8mr99401qkn.4.1686093249233; Tue, 06 Jun 2023 16:14:09 -0700 (PDT) Received: from ubuntu-22.localdomain ([192.19.222.250]) by smtp.gmail.com with ESMTPSA id x9-20020ae9e909000000b0075b23e55640sm5221519qkf.123.2023.06.06.16.14.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Jun 2023 16:14:08 -0700 (PDT) From: William Zhang To: Broadcom Kernel List , Linux MTD List Cc: f.fainelli@gmail.com, rafal@milecki.pl, kursad.oney@broadcom.com, joel.peshkin@broadcom.com, computersforpeace@gmail.com, anand.gore@broadcom.com, dregan@mail.com, kamal.dasu@broadcom.com, tomer.yacoby@broadcom.com, dan.beygelman@broadcom.com, William Zhang , Florian Fainelli , Miquel Raynal , linux-kernel@vger.kernel.org, Vignesh Raghavendra , Richard Weinberger , Boris Brezillon , Kamal Dasu Subject: [PATCH 02/12] mtd: rawnand: brcmnand: Fix potential false time out warning Date: Tue, 6 Jun 2023 16:12:42 -0700 Message-Id: <20230606231252.94838-3-william.zhang@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230606231252.94838-1-william.zhang@broadcom.com> References: <20230606231252.94838-1-william.zhang@broadcom.com> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000031912b05fd7e2d31" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --00000000000031912b05fd7e2d31 Content-Transfer-Encoding: 8bit If system is busy during the command status polling function, the driver may not get the chance to poll the status register till the end of time out and return the premature status. Do a final check after time out happens to ensure reading the correct status. Fixes: 9d2ee0a60b8b ("mtd: nand: brcmnand: Check flash #WP pin status before nand erase/program") Signed-off-by: William Zhang Reviewed-by: Florian Fainelli --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index b2cde1082b3b..b6346a8b9833 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -1080,6 +1080,14 @@ static int bcmnand_ctrl_poll_status(struct brcmnand_controller *ctrl, cpu_relax(); } while (time_after(limit, jiffies)); + /* + * do a final check after time out in case CPU is busy and driver does + * not get the enough time to poll to avoid false alarm + */ + val = brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS); + if ((val & mask) == expected_val) + return 0; + dev_warn(ctrl->dev, "timeout on status poll (expected %x got %x)\n", expected_val, val & mask); -- 2.37.3 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