[PATCH v3 45/48] scsi: wd719x: Stop using the SCSI pointer

Bart Van Assche
2022-02-11T22:34:52Z

Move the DMA handle into the per-command private data instead of using the
SCSI pointer from struct scsi_cmnd. This patch prepares for removal of the
SCSI pointer from struct scsi_cmnd.

Cc: Ondrej Zary <linux@zary.sk>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
drivers/scsi/wd719x.c | 12 ++++++------
drivers/scsi/wd719x.h | 1 +
2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/wd719x.c b/drivers/scsi/wd719x.c
index 1a7947554581..f341b79d8036 100644
--- a/drivers/scsi/wd719x.c
+++ b/drivers/scsi/wd719x.c
@@ -196,7 +196,7 @@ static void wd719x_finish_cmd(struct wd719x_scb *scb, int result)
dma_unmap_single(&wd->pdev->dev, scb->phys,
sizeof(struct wd719x_scb), DMA_BIDIRECTIONAL);
scsi_dma_unmap(cmd);
- dma_unmap_single(&wd->pdev->dev, cmd->SCp.dma_handle,
+ dma_unmap_single(&wd->pdev->dev, scb->dma_handle,
SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);

cmd->result = result << 16;
@@ -229,11 +229,11 @@ static int wd719x_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *cmd)

/* map sense buffer */
scb->sense_buf_length = SCSI_SENSE_BUFFERSIZE;
- cmd->SCp.dma_handle = dma_map_single(&wd->pdev->dev, cmd->sense_buffer,
- SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
- if (dma_mapping_error(&wd->pdev->dev, cmd->SCp.dma_handle))
+ scb->dma_handle = dma_map_single(&wd->pdev->dev, cmd->sense_buffer,
+ SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
+ if (dma_mapping_error(&wd->pdev->dev, scb->dma_handle))
goto out_unmap_scb;
- scb->sense_buf = cpu_to_le32(cmd->SCp.dma_handle);
+ scb->sense_buf = cpu_to_le32(scb->dma_handle);

/* request autosense */
scb->SCB_options |= WD719X_SCB_FLAGS_AUTO_REQUEST_SENSE;
@@ -288,7 +288,7 @@ static int wd719x_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
return 0;

out_unmap_sense:
- dma_unmap_single(&wd->pdev->dev, cmd->SCp.dma_handle,
+ dma_unmap_single(&wd->pdev->dev, scb->dma_handle,
SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE);
out_unmap_scb:
dma_unmap_single(&wd->pdev->dev, scb->phys, sizeof(*scb),
diff --git a/drivers/scsi/wd719x.h b/drivers/scsi/wd719x.h
index abaabd419a54..966ab0fb4621 100644
--- a/drivers/scsi/wd719x.h
+++ b/drivers/scsi/wd719x.h
@@ -56,6 +56,7 @@ struct wd719x_scb {
u8 flags[2]; /* 62-63 SCB specific flags (local to each thread) */
/* everything below is for driver use (not used by card) */
dma_addr_t phys; /* bus address of the SCB */
+ dma_addr_t dma_handle;
struct scsi_cmnd *cmd; /* a copy of the pointer we were passed */
struct list_head list;
struct wd719x_sglist sg_list[WD719X_SG] __aligned(8); /* SG list */