From patchwork Fri Sep 15 02:20:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 724120 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 E9E3FEE0205 for ; Fri, 15 Sep 2023 02:20:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231294AbjIOCUl (ORCPT ); Thu, 14 Sep 2023 22:20:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51388 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230512AbjIOCUk (ORCPT ); Thu, 14 Sep 2023 22:20:40 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62EBC1A8 for ; Thu, 14 Sep 2023 19:20:36 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A4E3C433C8; Fri, 15 Sep 2023 02:20:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1694744436; bh=pEKtWgpU8TX2BFp9rB7es1/dLWKc1SHIGOJr+OJg+HA=; h=From:To:Cc:Subject:Date:From; b=fLDAl9IiADRIl/P+JbKpmw6PytNU9Ic+jU1WGxI4Qoo7eLlwCQOhgl4e7HFQdu6Pe Q7K2Z4P8n5XeyUMAWix6QNTlaLxuW2g68ISk7mtXxkI8fgNM9bvly6DheBfKA5LmC/ iFZ/wlZRMlWRqYaA4XNEE3ccBdHGVglKrSm5/UF5mmVqkPk1ZwlpKQMn80ZHKIEgQD Z05FzR8Os94TCGth6EMoF1aSLnK4OTkMpPCGT+crjsNYAsJFcsauSdBT0S+IdMVkRS hiKg5dUoFHMSCctewCgEkiFAE+xEy5fDUabXNn7iOG5wf79ARAcFr+62cdcBD1aNaY eu6QmC//EZvPw== From: Damien Le Moal To: "Martin K . Petersen" , linux-scsi@vger.kernel.org Cc: John David Anglin Subject: [PATCH] scsi: Do no try to probe for CDL on old drives Date: Fri, 15 Sep 2023 11:20:34 +0900 Message-ID: <20230915022034.678121-1-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Some old drives (e.g. an Ultra320 SCSI disk as reported by John) do not seem to execute MAINTENANCE_IN / MI_REPORT_SUPPORTED_OPERATION_CODES commands correctly and hang when a non-zero service action is specified (one command format with service action case in scsi_report_opcode()). Currently, CDL probing with scsi_cdl_check_cmd() is the only caller using a non zero service action for scsi_report_opcode(). To avoid issues with these old drives, do not attempt CDL probe if the device reports support for an SPC version lower than 5 (CDL was introduced in SPC-5). To keep things working with ATA devices which probe for the CDL T2A and T2B pages introduced with SPC-6, modify ata_scsiop_inq_std() to claim SPC-6 version compatibility for ATA drives supporting CDL. SPC-6 standard version number is defined as Dh (= 13) in SPC-6 r09. Fix scsi_probe_lun() to correctly capture this value by changing the bit mask for the second byte of the INQUIRY response from 0x7 to 0xf. include/scsi/scsi.h is modified to add the definition SCSI_SPC_6 with the value 14 (Dh + 1). The missing definitions for the SCSI_SPC_4 and SCSI_SPC_5 versions are also added. Reported-by: John David Anglin Fixes: 624885209f31 ("scsi: core: Detect support for command duration limits") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Bart Van Assche Reviewed-by: Niklas Cassel --- drivers/ata/libata-scsi.c | 3 +++ drivers/scsi/scsi.c | 11 +++++++++++ drivers/scsi/scsi_scan.c | 2 +- include/scsi/scsi.h | 3 +++ 4 files changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 92ae4b4f30ac..7aa70af1fc07 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1828,6 +1828,9 @@ static unsigned int ata_scsiop_inq_std(struct ata_scsi_args *args, u8 *rbuf) hdr[2] = 0x7; /* claim SPC-5 version compatibility */ } + if (args->dev->flags & ATA_DFLAG_CDL) + hdr[2] = 0xd; /* claim SPC-6 version compatibility */ + memcpy(rbuf, hdr, sizeof(hdr)); memcpy(&rbuf[8], "ATA ", 8); ata_id_string(args->id, &rbuf[16], ATA_ID_PROD, 16); diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index d0911bc28663..89367c4bf0ef 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -613,6 +613,17 @@ void scsi_cdl_check(struct scsi_device *sdev) bool cdl_supported; unsigned char *buf; + /* + * Support for CDL was defined in SPC-5. Ignore devices reporting an + * lower SPC version. This also avoids problems with old drives choking + * on MAINTENANCE_IN / MI_REPORT_SUPPORTED_OPERATION_CODES with a + * service action specified, as done in scsi_cdl_check_cmd(). + */ + if (sdev->scsi_level < SCSI_SPC_5) { + sdev->cdl_supported = 0; + return; + } + buf = kmalloc(SCSI_CDL_CHECK_BUF_LEN, GFP_KERNEL); if (!buf) { sdev->cdl_supported = 0; diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 6650f63afec9..37dd6bbcffd3 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -822,7 +822,7 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result, * device is attached at LUN 0 (SCSI_SCAN_TARGET_PRESENT) so * non-zero LUNs can be scanned. */ - sdev->scsi_level = inq_result[2] & 0x07; + sdev->scsi_level = inq_result[2] & 0x0f; if (sdev->scsi_level >= 2 || (sdev->scsi_level == 1 && (inq_result[3] & 0x0f) == 1)) sdev->scsi_level++; diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h index ec093594ba53..4498f845b112 100644 --- a/include/scsi/scsi.h +++ b/include/scsi/scsi.h @@ -157,6 +157,9 @@ enum scsi_disposition { #define SCSI_3 4 /* SPC */ #define SCSI_SPC_2 5 #define SCSI_SPC_3 6 +#define SCSI_SPC_4 7 +#define SCSI_SPC_5 8 +#define SCSI_SPC_6 14 /* * INQ PERIPHERAL QUALIFIERS