Merge by hand (conflicts in scsi_lib.c)

This merge is pretty extensive.  The conflict is over the new
req->retries parameter, so I had to change the prototype to
scsi_setup_blk_pc_cmnd() and the usage in sd, sr and st.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

3 files changed, 19 insertions, 12 deletions

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index ce0d88bbaa06..79d8a914f9d0 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2498,17 +2498,9 @@ typedef struct scsi_qla_host {
  */
 #define LOOP_TRANSITION(ha) \
 	(test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) || \
-	 test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
-
-#define LOOP_NOT_READY(ha) \
-	((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) || \
-	  test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags) || \
-	  test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) || \
-	  test_bit(LOOP_RESYNC_ACTIVE, &ha->dpc_flags)) || \
+	 test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) || \
 	 atomic_read(&ha->loop_state) == LOOP_DOWN)
 
-#define LOOP_RDY(ha)	(!LOOP_NOT_READY(ha))
-
 #define TGT_Q(ha, t) (ha->otgt[t])
 
 #define to_qla_host(x)		((scsi_qla_host_t *) (x)->hostdata)
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index dadc91bd0ea9..7d973bd9022b 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1258,7 +1258,7 @@ qla2x00_configure_hba(scsi_qla_host_t *ha)
 	rval = qla2x00_get_adapter_id(ha,
 	    &loop_id, &al_pa, &area, &domain, &topo);
 	if (rval != QLA_SUCCESS) {
-		if (LOOP_NOT_READY(ha) || atomic_read(&ha->loop_down_timer) ||
+		if (LOOP_TRANSITION(ha) || atomic_read(&ha->loop_down_timer) ||
 		    (rval == QLA_COMMAND_ERROR && loop_id == 0x7)) {
 			DEBUG2(printk("%s(%ld) Loop is in a transition state\n",
 			    __func__, ha->host_no));
@@ -1795,7 +1795,7 @@ qla2x00_configure_loop(scsi_qla_host_t *ha)
 	}
 
 	if (rval == QLA_SUCCESS && test_bit(RSCN_UPDATE, &flags)) {
-		if (LOOP_NOT_READY(ha)) {
+		if (LOOP_TRANSITION(ha)) {
 			rval = QLA_FUNCTION_FAILED;
 		} else {
 			rval = qla2x00_configure_fabric(ha);
@@ -2368,7 +2368,7 @@ qla2x00_find_all_fabric_devs(scsi_qla_host_t *ha, struct list_head *new_fcports)
 		if (qla2x00_is_reserved_id(ha, loop_id))
 			continue;
 
-		if (atomic_read(&ha->loop_down_timer) || LOOP_NOT_READY(ha))
+		if (atomic_read(&ha->loop_down_timer) || LOOP_TRANSITION(ha))
 			break;
 
 		if (swl != NULL) {
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 09afc0f06bd4..5181d966fecb 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -909,6 +909,21 @@ qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
 			resid = resid_len;
 			cp->resid = resid;
 			CMD_RESID_LEN(cp) = resid;
+
+			if (!lscsi_status &&
+			    ((unsigned)(cp->request_bufflen - resid) <
+			     cp->underflow)) {
+				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;
+				break;
+			}
 		}
 		cp->result = DID_OK << 16 | lscsi_status;