[SCSI] sym53c8xx: Work around 53c896 erratum

Prevent DMA transfers from crossing the 16MB limit for early 53c896 chips.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
index db03c4c8ec1e..44169390c467 100644
--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -1531,6 +1531,10 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt,
         BUG_ON(sym2_transport_template == NULL);
         instance->transportt    = sym2_transport_template;
 
+        /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */
+        if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && np->revision_id < 2)
+                instance->dma_boundary = 0xFFFFFF;
+
         spin_unlock_irqrestore(instance->host_lock, flags);
 
         return instance;