diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-10-11 16:17:15 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-28 18:25:43 +0100 |
| commit | edc8ac1342d1e65bfb64e912fd783e28d0f881d9 (patch) | |
| tree | 6d032f1ccc7b1c73b78eb6546762de269ad6efe7 | |
| parent | 738fd69851a1519d3b339e6fcb9b117bac3da080 (diff) | |
scsi: dc395x: fix DMA API usage in sg_update_list
[ 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>
| -rw-r--r-- | drivers/scsi/dc395x.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c index 9da0ac360848..830b2d2dcf20 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; |