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scsi: mpt3sas: always use first reserved smid for ioctl passthrough

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ioctl passthrough commands require a SCSIIO smid, but cannot easily
integrate with the block layer. But the driver already has reserved some
SCSIIO smids and we're only ever allowing one ioctl command at a time we
can use the first reserved smid for ioctl commands.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke
2018-01-04 04:57:07 -08:00
committed by Martin K. Petersen
parent 9961c9bbf2
commit b0cd285eb5
2 changed files with 15 additions and 14 deletions
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10
drivers/scsi/mpt3sas/mpt3sas_ctl.c
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@@ -724,14 +724,8 @@ _ctl_do_mpt_command(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command karg,
goto out;
}
} else {
smid = mpt3sas_base_get_smid_scsiio(ioc, ioc->ctl_cb_idx, NULL);
if (!smid) {
pr_err(MPT3SAS_FMT "%s: failed obtaining a smid\n",
ioc->name, __func__);
ret = -EAGAIN;
goto out;
}
/* Use first reserved smid for passthrough ioctls */
smid = ioc->scsiio_depth - INTERNAL_SCSIIO_CMDS_COUNT + 1;
}
ret = 0;