Commit 7f90bc70 authored by Sreekanth Reddy's avatar Sreekanth Reddy Committed by Martin K. Petersen
Browse files

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: default avatarHimanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: default avatarSreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 2745ce0e

drivers/scsi/mpi3mr/mpi3mr_os.c

+15 −10
Original line number Diff line number Diff line
@@ -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) {
@@ -4569,25 +4574,25 @@ static int mpi3mr_qcmd(struct Scsi_Host *shost, 


	stgt_priv_data = sdev_priv_data->tgt_priv_data;



	dev_handle = stgt_priv_data->dev_handle;

	if (dev_handle == MPI3MR_INVALID_DEV_HANDLE) {

	if (atomic_read(&stgt_priv_data->block_io)) {

		if (mrioc->stop_drv_processing) {

			scmd->result = DID_NO_CONNECT << 16;

			scsi_done(scmd);

			goto out;

		}

	if (stgt_priv_data->dev_removed) {

		scmd->result = DID_NO_CONNECT << 16;

		scsi_done(scmd);

		retval = SCSI_MLQUEUE_DEVICE_BUSY;

		goto out;

	}



	if (atomic_read(&stgt_priv_data->block_io)) {

		if (mrioc->stop_drv_processing) {

	dev_handle = stgt_priv_data->dev_handle;

	if (dev_handle == MPI3MR_INVALID_DEV_HANDLE) {

		scmd->result = DID_NO_CONNECT << 16;

		scsi_done(scmd);

		goto out;

	}

		retval = SCSI_MLQUEUE_DEVICE_BUSY;

	if (stgt_priv_data->dev_removed) {

		scmd->result = DID_NO_CONNECT << 16;

		scsi_done(scmd);

		goto out;

	}