scsi: libsas: allow async aborts

We now first try to call ->eh_abort_handler from a work queue, but libsas
was always failing that for no good reason.  Allow async aborts.

Reviewed-by: Johannes Thumshirn <jth@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/libsas/sas_scsi_host.c

@@ -491,9 +491,6 @@ int sas_eh_abort_handler(struct scsi_cmnd *cmd)
 	struct Scsi_Host *host = cmd->device->host;
 	struct sas_internal *i = to_sas_internal(host->transportt);
 
-	if (current != host->ehandler)
-		return FAILED;
-
 	if (!i->dft->lldd_abort_task)
 		return FAILED;