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| author | Christoph Hellwig <hch@lst.de> | 2018-10-11 16:17:14 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-01 09:16:32 +0100 |
| commit | e95ec662b1267022143ae03afdcc65715a76dc89 (patch) | |
| tree | 3aac3bc7804728addba701e6ae2352ae71bca788 /drivers/scsi/dc395x.c | |
| parent | 95655b10529d2b9beee913088b762df0146238be (diff) | |
| download | linux-stable-e95ec662b1267022143ae03afdcc65715a76dc89.tar.gz linux-stable-e95ec662b1267022143ae03afdcc65715a76dc89.tar.bz2 linux-stable-e95ec662b1267022143ae03afdcc65715a76dc89.zip | |
scsi: dc395x: fix dma API usage in srb_done
[ Upstream commit 3a5bd7021184dec2946f2a4d7a8943f8a5713e52 ]
We can't just transfer ownership to the CPU and then unmap, as this will
break with swiotlb.
Instead unmap the command and sense buffer a little earlier in the I/O
completion handler and get rid of the pci_dma_sync_sg_for_cpu call
entirely.
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>
Diffstat (limited to 'drivers/scsi/dc395x.c')
| -rw-r--r-- | drivers/scsi/dc395x.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c index 1ed2cd82129d..08161df64ead 100644 --- a/drivers/scsi/dc395x.c +++ b/drivers/scsi/dc395x.c @@ -3447,14 +3447,12 @@ static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, } } - if (dir != PCI_DMA_NONE && scsi_sg_count(cmd)) - pci_dma_sync_sg_for_cpu(acb->dev, scsi_sglist(cmd), - scsi_sg_count(cmd), dir); - ckc_only = 0; /* Check Error Conditions */ ckc_e: + pci_unmap_srb(acb, srb); + if (cmd->cmnd[0] == INQUIRY) { unsigned char *base = NULL; struct ScsiInqData *ptr; @@ -3507,7 +3505,6 @@ static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, cmd, cmd->result); srb_free_insert(acb, srb); } - pci_unmap_srb(acb, srb); cmd->scsi_done(cmd); waiting_process_next(acb); |