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>

18 files changed, 60 insertions, 81 deletions

diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.h b/drivers/scsi/ibmvscsi/ibmvscsi.h
index 8bec0438dc8..5b0edd1f192 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.h
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.h
@@ -100,7 +100,7 @@ int ibmvscsi_init_crq_queue(struct crq_queue *queue,
 void ibmvscsi_release_crq_queue(struct crq_queue *queue,
 				struct ibmvscsi_host_data *hostdata,
 				int max_requests);
-void ibmvscsi_reset_crq_queue(struct crq_queue *queue,
+int ibmvscsi_reset_crq_queue(struct crq_queue *queue,
 			      struct ibmvscsi_host_data *hostdata);
 
 void ibmvscsi_handle_crq(struct viosrp_crq *crq,
diff --git a/drivers/scsi/ibmvscsi/iseries_vscsi.c b/drivers/scsi/ibmvscsi/iseries_vscsi.c
index 1045872b017..ce15d9e3962 100644
--- a/drivers/scsi/ibmvscsi/iseries_vscsi.c
+++ b/drivers/scsi/ibmvscsi/iseries_vscsi.c
@@ -117,9 +117,10 @@ void ibmvscsi_release_crq_queue(struct crq_queue *queue,
  *
  * no-op for iSeries
  */
-void ibmvscsi_reset_crq_queue(struct crq_queue *queue,
+int ibmvscsi_reset_crq_queue(struct crq_queue *queue,
 			      struct ibmvscsi_host_data *hostdata)
 {
+	return 0;
 }
 
 /**
diff --git a/drivers/scsi/ibmvscsi/rpa_vscsi.c b/drivers/scsi/ibmvscsi/rpa_vscsi.c
index 8bf5652f106..75db2f5c545 100644
--- a/drivers/scsi/ibmvscsi/rpa_vscsi.c
+++ b/drivers/scsi/ibmvscsi/rpa_vscsi.c
@@ -230,6 +230,11 @@ int ibmvscsi_init_crq_queue(struct crq_queue *queue,
 	rc = plpar_hcall_norets(H_REG_CRQ,
 				vdev->unit_address,
 				queue->msg_token, PAGE_SIZE);
+	if (rc == H_Resource) 
+		/* maybe kexecing and resource is busy. try a reset */
+		rc = ibmvscsi_reset_crq_queue(queue,
+					      hostdata);
+
 	if (rc == 2) {
 		/* Adapter is good, but other end is not ready */
 		printk(KERN_WARNING "ibmvscsi: Partner adapter not ready\n");
@@ -281,7 +286,7 @@ int ibmvscsi_init_crq_queue(struct crq_queue *queue,
  * @hostdata:	ibmvscsi_host_data of host
  *
  */
-void ibmvscsi_reset_crq_queue(struct crq_queue *queue,
+int ibmvscsi_reset_crq_queue(struct crq_queue *queue,
 			      struct ibmvscsi_host_data *hostdata)
 {
 	int rc;
@@ -309,4 +314,5 @@ void ibmvscsi_reset_crq_queue(struct crq_queue *queue,
 		printk(KERN_WARNING
 		       "ibmvscsi: couldn't register crq--rc 0x%x\n", rc);
 	}
+	return rc;
 }
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 2d12355eed3..10bcf42cb65 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -3391,7 +3391,7 @@ iscsi_conn_set_param(iscsi_connh_t connh, enum iscsi_param param,
 	switch(param) {
 	case ISCSI_PARAM_MAX_RECV_DLENGTH: {
 		char *saveptr = conn->data;
-		int flags = GFP_KERNEL;
+		gfp_t flags = GFP_KERNEL;
 
 		if (conn->data_size >= value) {
 			conn->max_recv_dlength = value;
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 379e8708976..72ddba98f8f 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -2173,9 +2173,12 @@ ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
 	if (unlikely(!ata_dev_present(dev)))
 		return NULL;
 
-	if (!atapi_enabled) {
-		if (unlikely(dev->class == ATA_DEV_ATAPI))
+	if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
+		if (unlikely(dev->class == ATA_DEV_ATAPI)) {
+			printk(KERN_WARNING "ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
+			       ap->id, dev->devno, atapi_enabled ? "not supported with this driver" : "disabled");
 			return NULL;
+		}
 	}
 
 	return dev;
diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index 9fa41ccadef..4a6feb1e5e3 100644
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c
@@ -665,7 +665,7 @@ mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy)
 					sg->offset;
 			} else
 				buf = cmd->request_buffer;
-			memset(cmd->request_buffer, 0, cmd->cmnd[4]);
+			memset(buf, 0, cmd->cmnd[4]);
 			if (cmd->use_sg) {
 				struct scatterlist *sg;
 
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index ce0d88bbaa0..79d8a914f9d 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 dadc91bd0ea..7d973bd9022 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 09afc0f06bd..5181d966fec 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;
 
diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
index ab7432a5778..9321cdf4568 100644
--- a/drivers/scsi/sata_mv.c
+++ b/drivers/scsi/sata_mv.c
@@ -86,7 +86,8 @@ enum {
 	MV_FLAG_DUAL_HC		= (1 << 30),  /* two SATA Host Controllers */
 	MV_FLAG_IRQ_COALESCE	= (1 << 29),  /* IRQ coalescing capability */
 	MV_COMMON_FLAGS		= (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
-				   ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO),
+				   ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
+				   ATA_FLAG_NO_ATAPI),
 	MV_6XXX_FLAGS		= MV_FLAG_IRQ_COALESCE,
 
 	CRQB_FLAG_READ		= (1 << 0),
diff --git a/drivers/scsi/sata_promise.c b/drivers/scsi/sata_promise.c
index 8a8e3e3ef0e..2691625f9bc 100644
--- a/drivers/scsi/sata_promise.c
+++ b/drivers/scsi/sata_promise.c
@@ -70,6 +70,9 @@ enum {
 	PDC_HAS_PATA		= (1 << 1), /* PDC20375 has PATA */
 
 	PDC_RESET		= (1 << 11), /* HDMA reset */
+
+	PDC_COMMON_FLAGS	= ATA_FLAG_NO_LEGACY | ATA_FLAG_SRST |
+				  ATA_FLAG_MMIO | ATA_FLAG_NO_ATAPI,
 };
 
 
@@ -162,8 +165,7 @@ static struct ata_port_info pdc_port_info[] = {
 	/* board_2037x */
 	{
 		.sht		= &pdc_ata_sht,
-		.host_flags	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
-				  ATA_FLAG_SRST | ATA_FLAG_MMIO,
+		.host_flags	= PDC_COMMON_FLAGS | ATA_FLAG_SATA,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
 		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
@@ -173,8 +175,7 @@ static struct ata_port_info pdc_port_info[] = {
 	/* board_20319 */
 	{
 		.sht		= &pdc_ata_sht,
-		.host_flags	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
-				  ATA_FLAG_SRST | ATA_FLAG_MMIO,
+		.host_flags	= PDC_COMMON_FLAGS | ATA_FLAG_SATA,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
 		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
@@ -184,8 +185,7 @@ static struct ata_port_info pdc_port_info[] = {
 	/* board_20619 */
 	{
 		.sht		= &pdc_ata_sht,
-		.host_flags	= ATA_FLAG_NO_LEGACY | ATA_FLAG_SRST |
-				  ATA_FLAG_MMIO | ATA_FLAG_SLAVE_POSS,
+		.host_flags	= PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
 		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
diff --git a/drivers/scsi/sata_sx4.c b/drivers/scsi/sata_sx4.c
index dcc3ad9a9d6..ac7b0d819eb 100644
--- a/drivers/scsi/sata_sx4.c
+++ b/drivers/scsi/sata_sx4.c
@@ -220,7 +220,8 @@ static struct ata_port_info pdc_port_info[] = {
 	{
 		.sht		= &pdc_sata_sht,
 		.host_flags	= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
-				  ATA_FLAG_SRST | ATA_FLAG_MMIO,
+				  ATA_FLAG_SRST | ATA_FLAG_MMIO |
+				  ATA_FLAG_NO_ATAPI,
 		.pio_mask	= 0x1f, /* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
 		.udma_mask	= 0x7f, /* udma0-6 ; FIXME */
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 53ea62d3b53..a2333d2c7af 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -422,10 +422,15 @@ static int scsi_eh_completed_normally(struct scsi_cmnd *scmd)
  **/
 static void scsi_eh_done(struct scsi_cmnd *scmd)
 {
+	struct completion     *eh_action;
+
 	SCSI_LOG_ERROR_RECOVERY(3,
 		printk("%s scmd: %p result: %x\n",
 			__FUNCTION__, scmd, scmd->result));
-	complete(scmd->device->host->eh_action);
+
+	eh_action = scmd->device->host->eh_action;
+	if (eh_action)
+		complete(eh_action);
 }
 
 /**
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 49fd18c1a9c..e08462d50c9 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -249,7 +249,7 @@ static inline struct list_head *skb_to_lh(struct sk_buff *skb)
 }
 
 static void*
-mempool_zone_alloc_skb(unsigned int gfp_mask, void *pool_data)
+mempool_zone_alloc_skb(gfp_t gfp_mask, void *pool_data)
 {
 	struct mempool_zone *zone = pool_data;
 
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index d82795455ef..9d893f08501 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -245,24 +245,10 @@ static int sd_init_command(struct scsi_cmnd * SCpnt)
 	 * SG_IO from block layer already setup, just copy cdb basically
 	 */
 	if (blk_pc_request(rq)) {
-		if (sizeof(rq->cmd) > sizeof(SCpnt->cmnd))
-			return 0;
-
-		memcpy(SCpnt->cmnd, rq->cmd, sizeof(SCpnt->cmnd));
-		SCpnt->cmd_len = rq->cmd_len;
-		if (rq_data_dir(rq) == WRITE)
-			SCpnt->sc_data_direction = DMA_TO_DEVICE;
-		else if (rq->data_len)
-			SCpnt->sc_data_direction = DMA_FROM_DEVICE;
-		else
-			SCpnt->sc_data_direction = DMA_NONE;
-
-		this_count = rq->data_len;
+		scsi_setup_blk_pc_cmnd(SCpnt, SD_PASSTHROUGH_RETRIES);
 		if (rq->timeout)
 			timeout = rq->timeout;
 
-		SCpnt->transfersize = rq->data_len;
-		SCpnt->allowed = SD_PASSTHROUGH_RETRIES;
 		goto queue;
 	}
 
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index a3fa64cf665..7e7398d563c 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -320,25 +320,11 @@ static int sr_init_command(struct scsi_cmnd * SCpnt)
 	 * these are already setup, just copy cdb basically
 	 */
 	if (SCpnt->request->flags & REQ_BLOCK_PC) {
-		struct request *rq = SCpnt->request;
+		scsi_setup_blk_pc_cmnd(SCpnt, MAX_RETRIES);
 
-		if (sizeof(rq->cmd) > sizeof(SCpnt->cmnd))
-			return 0;
-
-		memcpy(SCpnt->cmnd, rq->cmd, sizeof(SCpnt->cmnd));
-		SCpnt->cmd_len = rq->cmd_len;
-		if (!rq->data_len)
-			SCpnt->sc_data_direction = DMA_NONE;
-		else if (rq_data_dir(rq) == WRITE)
-			SCpnt->sc_data_direction = DMA_TO_DEVICE;
-		else
-			SCpnt->sc_data_direction = DMA_FROM_DEVICE;
-
-		this_count = rq->data_len;
-		if (rq->timeout)
-			timeout = rq->timeout;
+		if (SCpnt->timeout_per_command)
+			timeout = SCpnt->timeout_per_command;
 
-		SCpnt->transfersize = rq->data_len;
 		goto queue;
 	}
 
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 2096d137f5e..894ad53be04 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -4195,27 +4195,10 @@ static void st_intr(struct scsi_cmnd *SCpnt)
  */
 static int st_init_command(struct scsi_cmnd *SCpnt)
 {
-	struct request *rq;
-
 	if (!(SCpnt->request->flags & REQ_BLOCK_PC))
 		return 0;
 
-	rq = SCpnt->request;
-	if (sizeof(rq->cmd) > sizeof(SCpnt->cmnd))
-		return 0;
-
-	memcpy(SCpnt->cmnd, rq->cmd, sizeof(SCpnt->cmnd));
-	SCpnt->cmd_len = rq->cmd_len;
-
-	if (rq_data_dir(rq) == WRITE)
-		SCpnt->sc_data_direction = DMA_TO_DEVICE;
-	else if (rq->data_len)
-		SCpnt->sc_data_direction = DMA_FROM_DEVICE;
-	else
-		SCpnt->sc_data_direction = DMA_NONE;
-
-	SCpnt->timeout_per_command = rq->timeout;
-	SCpnt->transfersize = rq->data_len;
+	scsi_setup_blk_pc_cmnd(SCpnt, 0);
 	SCpnt->done = st_intr;
 	return 1;
 }
diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c b/drivers/scsi/sym53c8xx_2/sym_hipd.c
index 7a3c807dcfc..1010e716162 100644
--- a/drivers/scsi/sym53c8xx_2/sym_hipd.c
+++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c
@@ -1356,7 +1356,6 @@ static void sym_check_goals(struct sym_hcb *np, struct scsi_target *starget,
 		goal->iu = 0;
 		goal->dt = 0;
 		goal->qas = 0;
-		goal->period = 0;
 		goal->offset = 0;
 		return;
 	}
@@ -1416,7 +1415,8 @@ static int sym_prepare_nego(struct sym_hcb *np, struct sym_ccb *cp, u_char *msgp
 	 * Many devices implement PPR in a buggy way, so only use it if we
 	 * really want to.
 	 */
-	if (goal->iu || goal->dt || goal->qas || (goal->period < 0xa)) {
+	if (goal->offset &&
+	    (goal->iu || goal->dt || goal->qas || (goal->period < 0xa))) {
 		nego = NS_PPR;
 	} else if (spi_width(starget) != goal->width) {
 		nego = NS_WIDE;