The driver is not freeing message frame when returning failure from _ctl_do_task_abort. If you call this function 500 times when its unable to find an active task mid, you end up with no message frames. Signed-off-by: Eric Moore <eric.moore@xxxxxxx> diff -uaprN a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c --- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c 2009-04-09 16:40:38.000000000 -0600 +++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c 2009-04-09 16:44:05.000000000 -0600 @@ -714,8 +714,10 @@ _ctl_do_mpt_command(struct MPT2SAS_ADAPT if (tm_request->TaskType == MPI2_SCSITASKMGMT_TASKTYPE_ABORT_TASK) { - if (_ctl_do_task_abort(ioc, &karg, tm_request)) + if (_ctl_do_task_abort(ioc, &karg, tm_request)) { + mpt2sas_base_free_smid(ioc, smid); goto out; + } } mutex_lock(&ioc->tm_cmds.mutex); -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html