Merge branch 'mv-merge'

[sfrench/cifs-2.6.git] / drivers / scsi / sata_mv.c

diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
index eed67ae2dc0878a1119034c71f49f7063799c139..fa901fd650856e8f7b241ff5285bcc3ab84c4c6e 100644 (file)
--- a/drivers/scsi/sata_mv.c
+++ b/drivers/scsi/sata_mv.c
@@ -378,7 +378,6 @@ static struct scsi_host_template mv_sht = {
        .name                   = DRV_NAME,
        .ioctl                  = ata_scsi_ioctl,
        .queuecommand           = ata_scsi_queuecmd,
-       .eh_timed_out           = ata_scsi_timed_out,
        .eh_strategy_handler    = ata_scsi_error,
        .can_queue              = MV_USE_Q_DEPTH,
        .this_id                = ATA_SHT_THIS_ID,
@@ -1011,7 +1010,7 @@ static void mv_fill_sg(struct ata_queued_cmd *qc)
 
                        pp->sg_tbl[i].addr = cpu_to_le32(addr & 0xffffffff);
                        pp->sg_tbl[i].addr_hi = cpu_to_le32((addr >> 16) >> 16);
-                       pp->sg_tbl[i].flags_size = cpu_to_le32(len);
+                       pp->sg_tbl[i].flags_size = cpu_to_le32(len & 0xffff);
 
                        sg_len -= len;
                        addr += len;
@@ -1351,7 +1350,6 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
 {
        void __iomem *mmio = host_set->mmio_base;
        void __iomem *hc_mmio = mv_hc_base(mmio, hc);
-       struct ata_port *ap;
        struct ata_queued_cmd *qc;
        u32 hc_irq_cause;
        int shift, port, port0, hard_port, handled;
@@ -1374,25 +1372,32 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
 
        for (port = port0; port < port0 + MV_PORTS_PER_HC; port++) {
                u8 ata_status = 0;
-               ap = host_set->ports[port];
+               struct ata_port *ap = host_set->ports[port];
+               struct mv_port_priv *pp = ap->private_data;
+
                hard_port = port & MV_PORT_MASK;        /* range 0-3 */
                handled = 0;    /* ensure ata_status is set if handled++ */
 
-               if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) {
-                       /* new CRPB on the queue; just one at a time until NCQ
-                        */
-                       ata_status = mv_get_crpb_status(ap);
-                       handled++;
-               } else if ((DEV_IRQ << hard_port) & hc_irq_cause) {
-                       /* received ATA IRQ; read the status reg to clear INTRQ
-                        */
-                       ata_status = readb((void __iomem *)
+               /* Note that DEV_IRQ might happen spuriously during EDMA,
+                * and should be ignored in such cases.  We could mask it,
+                * but it's pretty rare and may not be worth the overhead.
+                */ 
+               if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
+                       /* EDMA: check for response queue interrupt */
+                       if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) {
+                               ata_status = mv_get_crpb_status(ap);
+                               handled = 1;
+                       }
+               } else {
+                       /* PIO: check for device (drive) interrupt */
+                       if ((DEV_IRQ << hard_port) & hc_irq_cause) {
+                               ata_status = readb((void __iomem *)
                                           ap->ioaddr.status_addr);
-                       handled++;
+                               handled = 1;
+                       }
                }
 
-               if (ap &&
-                   (ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR)))
+               if (ap->flags & (ATA_FLAG_PORT_DISABLED | ATA_FLAG_NOINTR))
                        continue;
 
                err_mask = ac_err_mask(ata_status);
@@ -1404,12 +1409,12 @@ static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
                if ((PORT0_ERR << shift) & relevant) {
                        mv_err_intr(ap);
                        err_mask |= AC_ERR_OTHER;
-                       handled++;
+                       handled = 1;
                }
 
-               if (handled && ap) {
+               if (handled) {
                        qc = ata_qc_from_tag(ap, ap->active_tag);
-                       if (NULL != qc) {
+                       if (qc && (qc->flags & ATA_QCFLAG_ACTIVE)) {
                                VPRINTK("port %u IRQ found for qc, "
                                        "ata_status 0x%x\n", port,ata_status);
                                /* mark qc status appropriately */