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scsi: mpi3mr: Block I/Os while refreshing target dev objects 

Block the I/Os on the target devices until corresponding target device's
target dev objects are refreshed as part of post controller reset
operation.

Link: https://lore.kernel.org/r/20220804131226.16653-16-sreekanth.reddy@broadcom.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sreekanth Reddy 2022-08-04 18:42:26 +05:30 committed by Martin K. Petersen
parent 2745ce0e6d
commit 7f90bc70d1
1 changed files with 15 additions and 10 deletions
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25
drivers/scsi/mpi3mr/mpi3mr_os.c
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@ -424,6 +424,8 @@ void mpi3mr_invalidate_devhandles(struct mpi3mr_ioc *mrioc)
tgt_priv->io_throttle_enabled = 0;
tgt_priv->io_divert = 0;
tgt_priv->throttle_group = NULL;
if (tgtdev->host_exposed)
atomic_set(&tgt_priv->block_io, 1);
}
}
}
@ -827,6 +829,7 @@ void mpi3mr_remove_tgtdev_from_host(struct mpi3mr_ioc *mrioc,
__func__, tgtdev->dev_handle, (unsigned long long)tgtdev->wwid);
if (tgtdev->starget && tgtdev->starget->hostdata) {
tgt_priv = tgtdev->starget->hostdata;
atomic_set(&tgt_priv->block_io, 0);
tgt_priv->dev_handle = MPI3MR_INVALID_DEV_HANDLE;
}
@ -1069,6 +1072,8 @@ static void mpi3mr_update_tgtdev(struct mpi3mr_ioc *mrioc,
scsi_tgt_priv_data->dev_type = tgtdev->dev_type;
scsi_tgt_priv_data->io_throttle_enabled =
tgtdev->io_throttle_enabled;
if (is_added == true)
atomic_set(&scsi_tgt_priv_data->block_io, 0);
}
switch (dev_pg0->access_status) {
@ -4569,6 +4574,16 @@ static int mpi3mr_qcmd(struct Scsi_Host *shost,
stgt_priv_data = sdev_priv_data->tgt_priv_data;
if (atomic_read(&stgt_priv_data->block_io)) {
if (mrioc->stop_drv_processing) {
scmd->result = DID_NO_CONNECT << 16;
scsi_done(scmd);
goto out;
}
retval = SCSI_MLQUEUE_DEVICE_BUSY;
goto out;
}
dev_handle = stgt_priv_data->dev_handle;
if (dev_handle == MPI3MR_INVALID_DEV_HANDLE) {
scmd->result = DID_NO_CONNECT << 16;
@ -4581,16 +4596,6 @@ static int mpi3mr_qcmd(struct Scsi_Host *shost,
goto out;
}
if (atomic_read(&stgt_priv_data->block_io)) {
if (mrioc->stop_drv_processing) {
scmd->result = DID_NO_CONNECT << 16;
scsi_done(scmd);
goto out;
}
retval = SCSI_MLQUEUE_DEVICE_BUSY;
goto out;
}
if (stgt_priv_data->dev_type == MPI3_DEVICE_DEVFORM_PCIE)
is_pcie_dev = 1;
if ((scmd->cmnd[0] == UNMAP) && is_pcie_dev &&