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[2620:137:e000::1:20]) by mx.google.com with ESMTP id b4-20020a630c04000000b00528d0d8b7bbsi7443431pgl.595.2023.06.27.12.56.29; Tue, 27 Jun 2023 12:56:41 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@broadcom.com header.s=google header.b=U99bkglA; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=broadcom.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230324AbjF0Tid (ORCPT + 99 others); Tue, 27 Jun 2023 15:38:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51770 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230214AbjF0TiY (ORCPT ); Tue, 27 Jun 2023 15:38:24 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD6DF19B5 for ; Tue, 27 Jun 2023 12:38:19 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id d9443c01a7336-1b7ffab9454so16173675ad.3 for ; Tue, 27 Jun 2023 12:38:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1687894699; x=1690486699; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=U6jLGJe+JGGax79XpISkVnPfy+abCUUfWZOAyTcMVmw=; b=U99bkglAeCfTB8XBCbyv+1GpA24LQHN18Dr/1J1QVs2vNq+OalPPbftDGNGLRKnFhb wFQeGQhr6tDjGXSkdPSdMeR5jkEFB3KClqzzAevNOARbxhlhPATBSPGKQtHV5knQQiCw aJpYNbt44YRnA9BMz6hstAzsD71hEhFRPHFi0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687894699; x=1690486699; 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=U6jLGJe+JGGax79XpISkVnPfy+abCUUfWZOAyTcMVmw=; b=SV8TZtOxh3F+ZvCSfPV8TrXMGWgqhq8N/jm9Er6g/e/XWIa6vtPesuIgz9aiEJ9nZo QOeCbNkBR30EheQMdI/dQkNyWMQH82j98z4Ssn5ztUgrBcKQdXwtR4v22Civz78aNCJ6 n5LBpvxHqMvfHWsyNJPyTVBOU48MP89ddXqMN1lIX7QcAQNUdINlMqygj0Ggl7z467bQ NUR8EmYO1tY3S+v0/f+NLolXsdML8rK9Zrm9KXm+cZ0aqE7p7bnAy5RSD7i2UVfJpgSz XVZG/Ua98jxmZC+vN2HRpnVSphAa+1jT8hIvBkWy/Qt4h9q3jlgqxLBoeYH1WOMCiLMq Mfiw== X-Gm-Message-State: AC+VfDxhqNqMFaPhykDjqoeNoaC8SjSkvfndPb8zNAguoVF2p/n2qkwk n5owbXhw3lKeaq/px4Nfp86ZTQ== X-Received: by 2002:a17:902:dace:b0:1b6:7b75:60f with SMTP id q14-20020a170902dace00b001b67b75060fmr7687704plx.41.1687894699322; Tue, 27 Jun 2023 12:38:19 -0700 (PDT) Received: from ubuntu-22.localdomain ([192.19.222.250]) by smtp.gmail.com with ESMTPSA id g7-20020a1709026b4700b001b7f40a8959sm4986919plt.76.2023.06.27.12.38.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jun 2023 12:38:18 -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 v3 3/5] mtd: rawnand: brcmnand: Fix crash during the panic_write Date: Tue, 27 Jun 2023 12:37:36 -0700 Message-Id: <20230627193738.19596-4-william.zhang@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230627193738.19596-1-william.zhang@broadcom.com> References: <20230627193738.19596-1-william.zhang@broadcom.com> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000fdbd6205ff219b35" X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --000000000000fdbd6205ff219b35 Content-Transfer-Encoding: 8bit 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 v3: None 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/raw/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) dev_dbg(ctrl->dev, "send native cmd %d addr 0x%llx\n", cmd, cmd_addr); - BUG_ON(ctrl->cmd_pending != 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 != 0); ctrl->cmd_pending = cmd; ret = bcmnand_ctrl_poll_status(ctrl, NAND_CTRL_RDY, NAND_CTRL_RDY, 0); -- 2.37.3 --000000000000fdbd6205ff219b35 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 AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS 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