From 82a452581230b3ffc9d6475dffdb2568497b5fec Mon Sep 17 00:00:00 2001 From: "Kashyap, Desai" Date: Tue, 5 Jul 2011 12:40:23 +0530 Subject: [PATCH] [SCSI] mpt2sas: WarpDrive Infinite command retries due to wrong scsi command entry in MPI message Issue: This issue is seen on LSI H/W WarpDrive SSS6200 When filed direct I/O is tried as volume I/O the scmd field in internal lookup table get cleared and because of that the retried volume I/O never gets reported as completed to SML. Result: I/O timeout and Error handling thread will kicking off Fix: Setting back the scmd in the lookup table before retrying the failed direct i/o Signed-off-by: Kashyap Desai Signed-off-by: James Bottomley --- 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 939f283..6abd2fc 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c +++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c @@ -4258,6 +4258,7 @@ _scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply) u32 log_info; struct MPT2SAS_DEVICE *sas_device_priv_data; u32 response_code = 0; + unsigned long flags; mpi_reply = mpt2sas_base_get_reply_virt_addr(ioc, reply); scmd = _scsih_scsi_lookup_get_clear(ioc, smid); @@ -4282,6 +4283,9 @@ _scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply) * the failed direct I/O should be redirected to volume */ if (_scsih_scsi_direct_io_get(ioc, smid)) { + spin_lock_irqsave(&ioc->scsi_lookup_lock, flags); + ioc->scsi_lookup[smid - 1].scmd = scmd; + spin_unlock_irqrestore(&ioc->scsi_lookup_lock, flags); _scsih_scsi_direct_io_set(ioc, smid, 0); memcpy(mpi_request->CDB.CDB32, scmd->cmnd, scmd->cmd_len); mpi_request->DevHandle = -- 2.7.4