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Commit 34996acc authored by Kai Makisara's avatar Kai Makisara Committed by James Bottomley
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[SCSI] sym53c8xx: Work around 53c896 erratum 



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

Signed-off-by: default avatarMatthew Wilcox <willy@linux.intel.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent 20d2d3af

drivers/scsi/sym53c8xx_2/sym_glue.c

+4 −0
Original line number Diff line number Diff line
@@ -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;