[ARM] ARM SCSI: Don't try to dma_map_sg too many scatterlist entries

An off-by-one bug meant we were always trying to map one too many
scatterlist entries.  This was mostly harmless prior to the checks
going in to consistent_sync(), but now causes the kernel to BUG.

Also, powertec.c was missing an assignment to info->ec.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

3 files changed, 7 insertions, 6 deletions

diff --git a/drivers/scsi/arm/cumana_2.c b/drivers/scsi/arm/cumana_2.c
index d2d51dc51ab8..82add77ad131 100644
--- a/drivers/scsi/arm/cumana_2.c
+++ b/drivers/scsi/arm/cumana_2.c
@@ -178,10 +178,10 @@ cumanascsi_2_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
                         dma_dir = DMA_MODE_READ,
                         alatch_dir = ALATCH_DMA_IN;
 
-                dma_map_sg(dev, info->sg, bufs + 1, map_dir);
+                dma_map_sg(dev, info->sg, bufs, map_dir);
 
                 disable_dma(dmach);
-                set_dma_sg(dmach, info->sg, bufs + 1);
+                set_dma_sg(dmach, info->sg, bufs);
                 writeb(alatch_dir, info->base + CUMANASCSI2_ALATCH);
                 set_dma_mode(dmach, dma_dir);
                 enable_dma(dmach);
diff --git a/drivers/scsi/arm/eesox.c b/drivers/scsi/arm/eesox.c
index d4136524fc46..ed06a8c19ad6 100644
--- a/drivers/scsi/arm/eesox.c
+++ b/drivers/scsi/arm/eesox.c
@@ -175,10 +175,10 @@ eesoxscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
                         map_dir = DMA_FROM_DEVICE,
                         dma_dir = DMA_MODE_READ;
 
-                dma_map_sg(dev, info->sg, bufs + 1, map_dir);
+                dma_map_sg(dev, info->sg, bufs, map_dir);
 
                 disable_dma(dmach);
-                set_dma_sg(dmach, info->sg, bufs + 1);
+                set_dma_sg(dmach, info->sg, bufs);
                 set_dma_mode(dmach, dma_dir);
                 enable_dma(dmach);
                 return fasdma_real_all;
diff --git a/drivers/scsi/arm/powertec.c b/drivers/scsi/arm/powertec.c
index f9cd20bfb958..159047a34997 100644
--- a/drivers/scsi/arm/powertec.c
+++ b/drivers/scsi/arm/powertec.c
@@ -148,10 +148,10 @@ powertecscsi_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
                         map_dir = DMA_FROM_DEVICE,
                         dma_dir = DMA_MODE_READ;
 
-                dma_map_sg(dev, info->sg, bufs + 1, map_dir);
+                dma_map_sg(dev, info->sg, bufs, map_dir);
 
                 disable_dma(dmach);
-                set_dma_sg(dmach, info->sg, bufs + 1);
+                set_dma_sg(dmach, info->sg, bufs);
                 set_dma_mode(dmach, dma_dir);
                 enable_dma(dmach);
                 return fasdma_real_all;
@@ -342,6 +342,7 @@ powertecscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
         info->base = base;
         powertecscsi_terminator_ctl(host, term[ec->slot_no]);
 
+        info->ec = ec;
         info->info.scsi.io_base         = base + POWERTEC_FAS216_OFFSET;
         info->info.scsi.io_shift        = POWERTEC_FAS216_SHIFT;
         info->info.scsi.irq             = ec->irq;