From: Christoph Hellwig hch@lst.de
[ Upstream commit 6c404a68bf83b4135a8a9aa1c388ebdf98e8ba7f ]
We need to transfer device ownership to the CPU before we can manipulate the mapped data.
Signed-off-by: Christoph Hellwig hch@lst.de Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/dc395x.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c index 9da0ac360848f..830b2d2dcf206 100644 --- a/drivers/scsi/dc395x.c +++ b/drivers/scsi/dc395x.c @@ -1972,6 +1972,11 @@ static void sg_update_list(struct ScsiReqBlk *srb, u32 left) xferred -= psge->length; } else { /* Partial SG entry done */ + pci_dma_sync_single_for_cpu(srb->dcb-> + acb->dev, + srb->sg_bus_addr, + SEGMENTX_LEN, + PCI_DMA_TODEVICE); psge->length -= xferred; psge->address += xferred; srb->sg_index = idx;