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ATI SB600 can't handle 256 sectors transfers with FPDMA (NCQ).

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MFC after:	3 days
This commit is contained in:
Alexander Motin 2009-09-03 12:37:17 +00:00
parent 5b1237b600
commit 19dbe46d28
1 changed files with 3 additions and 0 deletions
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3
sys/dev/ahci/ahci.c
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@ -1942,6 +1942,9 @@ ahciaction(struct cam_sim *sim, union ccb *ccb)
cpi->protocol = PROTO_ATA;
cpi->protocol_version = PROTO_VERSION_UNSPECIFIED;
cpi->maxio = MAXPHYS;
/* ATI SB600 can't handle 256 sectors with FPDMA (NCQ). */
if (pci_get_devid(device_get_parent(dev)) == 0x43801002)
cpi->maxio = min(cpi->maxio, 255 * 512);
cpi->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;