From 769578ff811e43ccddd96b15640fa7c9df65c374 Mon Sep 17 00:00:00 2001 From: "Kashyap, Desai" Date: Thu, 17 Jun 2010 13:49:28 +0530 Subject: [PATCH] [SCSI] mpt2sas: Copy sense buffer instead of working on direct memory location (1) driver was not setting the sense data size prior to sending SCSI_IO, resulting in the 0x31190000 loginfo (2) The driver needs to copy the sense data to local buffer prior to releasing the request message frame. If not, the sense buffer gets overwritten by the next SCSI_IO request. Signed-off-by: Kashyap Desai Signed-off-by: James Bottomley --- drivers/scsi/mpt2sas/mpt2sas_base.c | 6 +++++- drivers/scsi/mpt2sas/mpt2sas_base.h | 2 ++ drivers/scsi/mpt2sas/mpt2sas_ctl.c | 25 +++++++++++++++++++++---- 3 files changed, 28 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c index d84874492cbf..1f22a764927a 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_base.c +++ b/drivers/scsi/mpt2sas/mpt2sas_base.c @@ -3668,12 +3668,14 @@ mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc) /* ctl module internal command bits */ ioc->ctl_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL); + ioc->ctl_cmds.sense = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL); ioc->ctl_cmds.status = MPT2_CMD_NOT_USED; mutex_init(&ioc->ctl_cmds.mutex); if (!ioc->base_cmds.reply || !ioc->transport_cmds.reply || !ioc->scsih_cmds.reply || !ioc->tm_cmds.reply || - !ioc->config_cmds.reply || !ioc->ctl_cmds.reply) { + !ioc->config_cmds.reply || !ioc->ctl_cmds.reply || + !ioc->ctl_cmds.sense) { r = -ENOMEM; goto out_free_resources; } @@ -3722,6 +3724,7 @@ mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc) kfree(ioc->config_cmds.reply); kfree(ioc->base_cmds.reply); kfree(ioc->ctl_cmds.reply); + kfree(ioc->ctl_cmds.sense); kfree(ioc->pfacts); ioc->ctl_cmds.reply = NULL; ioc->base_cmds.reply = NULL; @@ -3754,6 +3757,7 @@ mpt2sas_base_detach(struct MPT2SAS_ADAPTER *ioc) kfree(ioc->pd_handles); kfree(ioc->pfacts); kfree(ioc->ctl_cmds.reply); + kfree(ioc->ctl_cmds.sense); kfree(ioc->base_cmds.reply); kfree(ioc->tm_cmds.reply); kfree(ioc->transport_cmds.reply); diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h index 6fdee1680a6b..2bbb870a199a 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_base.h +++ b/drivers/scsi/mpt2sas/mpt2sas_base.h @@ -247,6 +247,7 @@ struct MPT2SAS_DEVICE { * @mutex: mutex * @done: completion * @reply: reply message pointer + * @sense: sense data * @status: MPT2_CMD_XXX status * @smid: system message id */ @@ -254,6 +255,7 @@ struct _internal_cmd { struct mutex mutex; struct completion done; void *reply; + void *sense; u16 status; u16 smid; }; diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c index ce63a4a66706..c3f34a76913b 100644 --- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c +++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c @@ -275,6 +275,9 @@ mpt2sas_ctl_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply) { MPI2DefaultReply_t *mpi_reply; + Mpi2SCSIIOReply_t *scsiio_reply; + const void *sense_data; + u32 sz; if (ioc->ctl_cmds.status == MPT2_CMD_NOT_USED) return 1; @@ -285,6 +288,20 @@ mpt2sas_ctl_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 msix_index, if (mpi_reply) { memcpy(ioc->ctl_cmds.reply, mpi_reply, mpi_reply->MsgLength*4); ioc->ctl_cmds.status |= MPT2_CMD_REPLY_VALID; + /* get sense data */ + if (mpi_reply->Function == MPI2_FUNCTION_SCSI_IO_REQUEST || + mpi_reply->Function == + MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH) { + scsiio_reply = (Mpi2SCSIIOReply_t *)mpi_reply; + if (scsiio_reply->SCSIState & + MPI2_SCSI_STATE_AUTOSENSE_VALID) { + sz = min_t(u32, SCSI_SENSE_BUFFERSIZE, + le32_to_cpu(scsiio_reply->SenseCount)); + sense_data = mpt2sas_base_get_sense_buffer(ioc, + smid); + memcpy(ioc->ctl_cmds.sense, sense_data, sz); + } + } } #ifdef CONFIG_SCSI_MPT2SAS_LOGGING _ctl_display_some_debug(ioc, smid, "ctl_done", mpi_reply); @@ -618,7 +635,6 @@ _ctl_do_mpt_command(struct MPT2SAS_ADAPTER *ioc, u8 issue_reset; u32 sz; void *psge; - void *priv_sense = NULL; void *data_out = NULL; dma_addr_t data_out_dma; size_t data_out_sz = 0; @@ -782,10 +798,10 @@ _ctl_do_mpt_command(struct MPT2SAS_ADAPTER *ioc, { Mpi2SCSIIORequest_t *scsiio_request = (Mpi2SCSIIORequest_t *)mpi_request; + scsiio_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE; scsiio_request->SenseBufferLowAddress = mpt2sas_base_get_sense_buffer_dma(ioc, smid); - priv_sense = mpt2sas_base_get_sense_buffer(ioc, smid); - memset(priv_sense, 0, SCSI_SENSE_BUFFERSIZE); + memset(ioc->ctl_cmds.sense, 0, SCSI_SENSE_BUFFERSIZE); if (mpi_request->Function == MPI2_FUNCTION_SCSI_IO_REQUEST) mpt2sas_base_put_smid_scsi_io(ioc, smid, le16_to_cpu(mpi_request->FunctionDependent1)); @@ -929,7 +945,8 @@ _ctl_do_mpt_command(struct MPT2SAS_ADAPTER *ioc, MPI2_FUNCTION_SCSI_IO_REQUEST || mpi_request->Function == MPI2_FUNCTION_RAID_SCSI_IO_PASSTHROUGH)) { sz = min_t(u32, karg.max_sense_bytes, SCSI_SENSE_BUFFERSIZE); - if (copy_to_user(karg.sense_data_ptr, priv_sense, sz)) { + if (copy_to_user(karg.sense_data_ptr, + ioc->ctl_cmds.sense, sz)) { printk(KERN_ERR "failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); ret = -ENODATA; -- 2.20.1