From nobody Sun Feb 8 14:10:34 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 8BB1FEB64DC for ; Sat, 17 Jun 2023 02:30:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233904AbjFQCaQ (ORCPT ); Fri, 16 Jun 2023 22:30:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52138 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232772AbjFQCaF (ORCPT ); Fri, 16 Jun 2023 22:30:05 -0400 Received: from mail-ot1-x32c.google.com (mail-ot1-x32c.google.com [IPv6:2607:f8b0:4864:20::32c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 422703AA8 for ; Fri, 16 Jun 2023 19:29:59 -0700 (PDT) Received: by mail-ot1-x32c.google.com with SMTP id 46e09a7af769-6b29b9f5c40so1170225a34.2 for ; Fri, 16 Jun 2023 19:29:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1686968998; x=1689560998; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=vSxxaZtEjn5rV3bppsvJwGxV+2k2QNug6CJhlPL5TKM=; b=SK+XQt0cAX6bNd8iyDZgiDXHAV/n/iWXvnMjZ5/gYAnF7FGVkZ1XGK/YhgoDVxvsdX yavVwVTvcKUx4QtIULkDpJPjhgrjP9HaMLgDUkrlR73RQVW9h+8kJe+2UlmaKrhBsx2+ vD4GqsBSdZBlLxT6Z5iH1gUKRR+FSvJDjFzFM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686968998; x=1689560998; 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=vSxxaZtEjn5rV3bppsvJwGxV+2k2QNug6CJhlPL5TKM=; b=cmsO41482oYagdpEc+B6PvXpzdmL921lpabc1YHMA8ijZn6ulyA0mvn0mB9Opqv7Rp f60DDOkVOQee2ZA7gJJ0iNzXUj3TjfvlcLl0y9qiXYn0P5WhbehEFWOBu63Ar+hhjH5H NFrFoTzaGvmjkNPzMIkTmewhTPrRWpGbBVHTpG99hBb7vcCg+H3wKW1p31vwNr8WfO9d +BYq8l3hs1r1m4kR77Um5wigLyAvX6NHpjq5caU1Z2XEALjneLYncwwgWL6fr/gJVK0K /FgTFBqGgyZNACRZl0Icw2FdIDWl2xR5DZqQ11/Ubp21ZiNhDnSgMiOABBo1+bx/Wy+r JrwA== X-Gm-Message-State: AC+VfDxWGpHWcDTVbzytH5WrOYBZThinWCCEajxAV8PSwoxzbFnISNK3 Y10p9epPwBMcet2saa8zPTN3/g== X-Google-Smtp-Source: ACHHUZ77VFodn6Z6LTKbV4w5bYm205UAXrxgxHpipwpWmXf5gH+urS83i+YW4ZQHdE5o18dlpDRilw== X-Received: by 2002:a05:6830:1:b0:6b1:5100:557c with SMTP id c1-20020a056830000100b006b15100557cmr1243964otp.34.1686968998558; Fri, 16 Jun 2023 19:29:58 -0700 (PDT) Received: from ubuntu-22.localdomain ([192.19.222.250]) by smtp.gmail.com with ESMTPSA id b2-20020aa78702000000b006668f004420sm3520239pfo.148.2023.06.16.19.29.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Jun 2023 19:29:57 -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 , Kamal Dasu Subject: [PATCH v2 3/4] mtd: rawnand: brcmnand: Fix crash during the panic_write Date: Fri, 16 Jun 2023 19:29:19 -0700 Message-Id: <20230617022920.67173-4-william.zhang@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230617022920.67173-1-william.zhang@broadcom.com> References: <20230617022920.67173-1-william.zhang@broadcom.com> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000ebe82505fe4a1398" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --000000000000ebe82505fe4a1398 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" During the panic write path to execute another nand command, if there is a pending command, we should wait for the command instead of calling BUG_ON so we don't crash while crashing. Fixes: 27c5b17cd1b1 ("mtd: nand: add NAND driver "library" for Broadcom STB= NAND controller") Signed-off-by: William Zhang Reviewed-by: Florian Fainelli Reviewed-by: Kursad Oney Reviewed-by: Kamal Dasu --- Changes in v2: None drivers/mtd/nand/raw/brcmnand/brcmnand.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/ra= w/brcmnand/brcmnand.c index 37c2c7cfa00e..ea03104692bf 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -1608,7 +1608,17 @@ static void brcmnand_send_cmd(struct brcmnand_host *= host, int cmd) =20 dev_dbg(ctrl->dev, "send native cmd %d addr 0x%llx\n", cmd, cmd_addr); =20 - BUG_ON(ctrl->cmd_pending !=3D 0); + /* + * If we came here through _panic_write and there is a pending + * command, try to wait for it. If it times out, rather than + * hitting BUG_ON, just return so we don't crash while crashing. + */ + if (oops_in_progress) { + if (ctrl->cmd_pending && + bcmnand_ctrl_poll_status(ctrl, NAND_CTRL_RDY, NAND_CTRL_RDY, 0)) + return; + } else + BUG_ON(ctrl->cmd_pending !=3D 0); ctrl->cmd_pending =3D cmd; =20 ret =3D bcmnand_ctrl_poll_status(ctrl, NAND_CTRL_RDY, NAND_CTRL_RDY, 0); --=20 2.37.3 --000000000000ebe82505fe4a1398 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQcAYJKoZIhvcNAQcCoIIQYTCCEF0CAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3HMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT 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