Commit 82141ddb authored by Kashyap Desai's avatar Kashyap Desai Committed by Martin K. Petersen
Browse files

scsi: mpi3mr: Allow certain commands during pci-remove hook 

Instead of driver returning DID_NO_CONNECT during driver unload allow SSU
and Sync Cache commands to be sent to the controller to flush any cached
data from the drive.

Link: https://lore.kernel.org/r/20210520152545.2710479-16-kashyap.desai@broadcom.com


Cc: sathya.prakash@broadcom.com
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarTomas Henzl <thenzl@redhat.com>
Reviewed-by: default avatarHimanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: default avatarKashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 0ea17734

drivers/scsi/mpi3mr/mpi3mr_os.c

+22 −1
Original line number Diff line number Diff line
@@ -2767,6 +2767,26 @@ static int mpi3mr_target_alloc(struct scsi_target *starget) 
	return retval;

}



/**

 * mpi3mr_allow_scmd_to_fw - Command is allowed during shutdown

 * @scmd: SCSI Command reference

 *

 * Checks whether a cdb is allowed during shutdown or not.

 *

 * Return: TRUE for allowed commands, FALSE otherwise.

 */



inline bool mpi3mr_allow_scmd_to_fw(struct scsi_cmnd *scmd)

{

	switch (scmd->cmnd[0]) {

	case SYNCHRONIZE_CACHE:

	case START_STOP:

		return true;

	default:

		return false;

	}

}



/**

 * mpi3mr_qcmd - I/O request despatcher

 * @shost: SCSI Host reference
@@ -2802,7 +2822,8 @@ static int mpi3mr_qcmd(struct Scsi_Host *shost, 
		goto out;

	}



	if (mrioc->stop_drv_processing) {

	if (mrioc->stop_drv_processing &&

	    !(mpi3mr_allow_scmd_to_fw(scmd))) {

		scmd->result = DID_NO_CONNECT << 16;

		scmd->scsi_done(scmd);

		goto out;