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authorShyam Sundar <shyam.sundar@qlogic.com>2007-07-19 15:05:59 -0700
committerJames Bottomley <jejb@mulgrave.localdomain>2007-07-20 09:24:04 -0500
commit8084fe168a5252548cdddf2ed181c337fecd0523 (patch)
tree87e1c9c175972bfd7ca00963b3eb64c714e3c125 /drivers/scsi
parent5881569bb33cdb0d4cdcd44d9ca2551ab04fb811 (diff)
[SCSI] qla2xxx: Validate mid-layer 'underflow' during check-condition handling.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/qla2xxx/qla_isr.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index fa21cd86e9e..4a50b931ca6 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1062,6 +1062,25 @@ qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
cp->device->id, cp->device->lun, cp,
cp->serial_number));
+ /*
+ * In case of a Underrun condition, set both the lscsi
+ * status and the completion status to appropriate
+ * values.
+ */
+ if (resid &&
+ ((unsigned)(cp->request_bufflen - resid) <
+ cp->underflow)) {
+ DEBUG2(qla_printk(KERN_INFO, ha,
+ "scsi(%ld:%d:%d:%d): Mid-layer underflow "
+ "detected (%x of %x bytes)...returning "
+ "error status.\n", ha->host_no,
+ cp->device->channel, cp->device->id,
+ cp->device->lun, resid,
+ cp->request_bufflen));
+
+ cp->result = DID_ERROR << 16 | lscsi_status;
+ }
+
if (sense_len)
DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
CMD_ACTUAL_SNSLEN(cp)));