diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-10-11 10:15:35 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-10-16 05:39:23 +0300 |
| commit | 67d98f0a83f8d5eafe8f584fef70b1d790a36411 (patch) | |
| tree | ccd44aef32873c0d3ac239ef9c57ba7c97edb0d4 /drivers/scsi/megaraid/megaraid_mbox.c | |
| parent | ca2ade24157693b4e533ccec69df00ef719d4aad (diff) | |
| download | linux-67d98f0a83f8d5eafe8f584fef70b1d790a36411.tar.xz | |
scsi: megaraid_mbox: remove bogus use of pci_dma_sync_sg_* APIs
The dma_map_sg / dma_unmap_sg APIs called from scsi_dma_map /
scsi_dma_unmap already transfer memory ownership to the device or cpu
respectively. Adding additional calls to pci_dma_sync_sg_* will in fact
lead to data corruption if we end up using swiotlb for some reason.
Also remove the now pointless megaraid_mbox_sync_scb function.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_mbox.c')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_mbox.c | 35 |
1 files changed, 1 insertions, 34 deletions
diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c index 2013523605c5..89c85a5a47af 100644 --- a/drivers/scsi/megaraid/megaraid_mbox.c +++ b/drivers/scsi/megaraid/megaraid_mbox.c @@ -1428,12 +1428,6 @@ mbox_post_cmd(adapter_t *adapter, scb_t *scb) adapter->outstanding_cmds++; - if (scb->dma_direction == PCI_DMA_TODEVICE) - pci_dma_sync_sg_for_device(adapter->pdev, - scsi_sglist(scb->scp), - scsi_sg_count(scb->scp), - PCI_DMA_TODEVICE); - mbox->busy = 1; // Set busy mbox->poll = 0; mbox->ack = 0; @@ -2181,31 +2175,6 @@ megaraid_isr(int irq, void *devp) /** - * megaraid_mbox_sync_scb - sync kernel buffers - * @adapter : controller's soft state - * @scb : pointer to the resource packet - * - * DMA sync if required. - */ -static void -megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) -{ - mbox_ccb_t *ccb; - - ccb = (mbox_ccb_t *)scb->ccb; - - if (scb->dma_direction == PCI_DMA_FROMDEVICE) - pci_dma_sync_sg_for_cpu(adapter->pdev, - scsi_sglist(scb->scp), - scsi_sg_count(scb->scp), - PCI_DMA_FROMDEVICE); - - scsi_dma_unmap(scb->scp); - return; -} - - -/** * megaraid_mbox_dpc - the tasklet to complete the commands from completed list * @devp : pointer to HBA soft state * @@ -2403,9 +2372,7 @@ megaraid_mbox_dpc(unsigned long devp) megaraid_mbox_display_scb(adapter, scb); } - // Free our internal resources and call the mid-layer callback - // routine - megaraid_mbox_sync_scb(adapter, scb); + scsi_dma_unmap(scp); // remove from local clist list_del_init(&scb->list); |