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Mon, 23 Jan 2023 22:11:07 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::c888:aca:1eb9:ca4f]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::c888:aca:1eb9:ca4f%5]) with mapi id 15.20.6043.016; Mon, 23 Jan 2023 22:11:07 +0000 From: Mike Christie To: bvanassche@acm.org, mwilck@suse.com, hch@lst.de, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, james.bottomley@hansenpartnership.com Cc: Mike Christie Subject: [PATCH v7 11/22] scsi: spi: Have scsi-ml retry spi_execute errors Date: Mon, 23 Jan 2023 16:10:35 -0600 Message-Id: <20230123221046.125483-12-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230123221046.125483-1-michael.christie@oracle.com> References: <20230123221046.125483-1-michael.christie@oracle.com> X-ClientProxiedBy: DM6PR02CA0134.namprd02.prod.outlook.com (2603:10b6:5:1b4::36) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|SJ0PR10MB5597:EE_ X-MS-Office365-Filtering-Correlation-Id: e109bef7-45e3-4a85-e130-08dafd8eb9bb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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There is one behavior change where we no longer retry when scsi_execute_cmd returns < 0, but we should be ok. We don't need to retry for failures like the queue being removed, and for the case where there are no tags/reqs the block layer waits/retries for us. For possible memory allocation failures from blk_rq_map_kern we use GFP_NOIO, so retrying will probably not help. Signed-off-by: Mike Christie --- drivers/scsi/scsi_transport_spi.c | 35 ++++++++++++++++--------------- 1 file changed, 18 insertions(+), 17 deletions(-) diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c index 2442d4d2e3f3..b269144dca3e 100644 --- a/drivers/scsi/scsi_transport_spi.c +++ b/drivers/scsi/scsi_transport_spi.c @@ -108,29 +108,30 @@ static int spi_execute(struct scsi_device *sdev, const void *cmd, enum req_op op, void *buffer, unsigned int bufflen, struct scsi_sense_hdr *sshdr) { - int i, result; - struct scsi_sense_hdr sshdr_tmp; blk_opf_t opf = op | REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER; + struct scsi_failure failures[] = { + { + .sense = UNIT_ATTENTION, + .asc = SCMD_FAILURE_ASC_ANY, + .ascq = SCMD_FAILURE_ASCQ_ANY, + .allowed = DV_RETRIES, + .result = SAM_STAT_CHECK_CONDITION, + }, + {}, + }; const struct scsi_exec_args exec_args = { .req_flags = BLK_MQ_REQ_PM, - .sshdr = sshdr ? : &sshdr_tmp, + .sshdr = sshdr, + .failures = failures, }; - sshdr = exec_args.sshdr; - - for(i = 0; i < DV_RETRIES; i++) { - /* - * The purpose of the RQF_PM flag below is to bypass the - * SDEV_QUIESCE state. - */ - result = scsi_execute_cmd(sdev, cmd, opf, buffer, bufflen, - DV_TIMEOUT, 1, &exec_args); - if (result < 0 || !scsi_sense_valid(sshdr) || - sshdr->sense_key != UNIT_ATTENTION) - break; - } - return result; + /* + * The purpose of the RQF_PM flag below is to bypass the + * SDEV_QUIESCE state. + */ + return scsi_execute_cmd(sdev, cmd, opf, buffer, bufflen, DV_TIMEOUT, 1, + &exec_args); } static struct {