From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755281AbbAFLyp (ORCPT ); Tue, 6 Jan 2015 06:54:45 -0500 Received: from exprod7og115.obsmtp.com ([64.18.2.217]:59442 "EHLO exprod7og115.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755054AbbAFLyn (ORCPT ); Tue, 6 Jan 2015 06:54:43 -0500 From: Sreekanth Reddy X-Google-Original-From: Sreekanth Reddy To: jejb@kernel.org, hch@infradead.org Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, JBottomley@Parallels.com, Sathya.Prakash@avagotech.com, Nagalakshmi.Nandigama@avagotech.com, linux-kernel@vger.kernel.org, Sreekanth Reddy Subject: [PATCH 07/22] [SCSI] mpt2sas: Complete the SCSI command with DID_RESET status for log_info value 0x0x32010081 Date: Tue, 6 Jan 2015 17:24:12 +0530 Message-Id: <1420545252-35340-1-git-send-email-Sreekanth.Reddy@avagotech.com> X-Mailer: git-send-email 2.0.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For any SCSI command, if the driver receives IOC status = SCSI_IOC_TERMINATED and log info = 0x32010081 then that command will be completed with DID_RESET host status. The definition of this log info value is "Virtual IO has failed and has to be retried". Firmware will provide this log info value with IOC Status "SCSI_IOC_TERMINATED", whenever a drive (with is a part of a volume) is pulled and pushed back within some minimal delay. With this log info value, firmware informs the driver to retry the failed IO command infinite times, so to provide some time for the firmware to discover the reinserted drive successfully instated of just retrying failed command for five times( doesn't giving enough time for firmware to complete the drive discovery) and failing the IO permanently even though drive came back successfully. Signed-off-by: Sreekanth Reddy --- drivers/scsi/mpt2sas/mpt2sas_scsih.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c index 38acb91..c6bb136 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c +++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c @@ -4574,6 +4574,10 @@ _scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply) scmd->result = DID_TRANSPORT_DISRUPTED << 16; goto out; } + if (log_info == 0x32010081) { + scmd->result = DID_RESET << 16; + break; + } scmd->result = DID_SOFT_ERROR << 16; break; case MPI2_IOCSTATUS_SCSI_TASK_TERMINATED: -- 2.0.2