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In the case where the controller supports an sg_list LESS than our predefined

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and tuned value, we would advertise the unsupported value to CAM and it would
merrily destroy the controller with way too many IO operations.

This manifests itself in a Zero Memory RAID configuration for a P410 and
possibly other controllers.

Obtained from:	Yahoo! Inc.
MFC after:	2 weeks
This commit is contained in:
Sean Bruno 2013-04-25 23:10:34 +00:00
parent 20e0cc0abb
commit 78d58a11fc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=249908
1 changed files with 1 additions and 1 deletions
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2
sys/dev/ciss/ciss.c
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@ -3005,7 +3005,7 @@ ciss_cam_action(struct cam_sim *sim, union ccb *ccb)
cpi->transport_version = 2;
cpi->protocol = PROTO_SCSI;
cpi->protocol_version = SCSI_REV_2;
cpi->maxio = (CISS_MAX_SG_ELEMENTS - 1) * PAGE_SIZE;
cpi->maxio = (min(CISS_MAX_SG_ELEMENTS, sc->ciss_cfg->max_sg_length) - 1) * PAGE_SIZE;
ccb->ccb_h.status = CAM_REQ_CMP;
break;
}