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scsi: qla2xxx: Fix DMA error when the DIF sg buffer crosses 4GB boundary

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When SGE buffer containing DIF information crosses 4G boundary, it results
in DMA error. This patch fixes this issue by calculating SGE buffer size
and if it crosses 4G boundary, driver will split it into multiple SGE
buffers to avoid DMA error.

Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Giridhar Malavali
2018-12-21 09:33:45 -08:00
committed by Martin K. Petersen
parent 7855d2ba11
commit 50b812755e
8 changed files with 502 additions and 67 deletions
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11
drivers/scsi/qla2xxx/qla_isr.c
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@@ -2725,6 +2725,17 @@ check_scsi_status:
cp->device->vendor);
break;
case CS_DMA:
ql_log(ql_log_info, fcport->vha, 0x3022,
"CS_DMA error: 0x%x-0x%x (0x%x) nexus=%ld:%d:%llu portid=%06x oxid=0x%x cdb=%10phN len=0x%x rsp_info=0x%x resid=0x%x fw_resid=0x%x sp=%p cp=%p.\n",
comp_status, scsi_status, res, vha->host_no,
cp->device->id, cp->device->lun, fcport->d_id.b24,
ox_id, cp->cmnd, scsi_bufflen(cp), rsp_info_len,
resid_len, fw_resid_len, sp, cp);
ql_dump_buffer(ql_dbg_tgt + ql_dbg_verbose, vha, 0xe0ee,
pkt, sizeof(*sts24));
res = DID_ERROR << 16;
break;
default:
res = DID_ERROR << 16;
break;