diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-04-14 10:42:24 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-04-22 19:47:35 +0300 |
| commit | cc97923a5bccc776851c242b61015faf288d5c22 (patch) | |
| tree | d6510d4f326674e96bdf70c4f07472f492537db8 /include/scsi/scsi_device.h | |
| parent | 0475bd6c65976c390e3805a1e5f10fc30ca8def2 (diff) | |
| download | linux-cc97923a5bccc776851c242b61015faf288d5c22.tar.xz | |
block: move dma drain handling to scsi
Don't burden the common block code with with specifics of the libata DMA
draining mechanism. Instead move most of the code to the scsi midlayer.
That also means the nr_phys_segments adjustments in the blk-mq fast path
can go away entirely, given that SCSI never looks at nr_phys_segments
after mapping the request to a scatterlist.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/scsi/scsi_device.h')
| -rw-r--r-- | include/scsi/scsi_device.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index c3cba2aaf934..bc5909033d13 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -229,6 +229,9 @@ struct scsi_device { struct scsi_device_handler *handler; void *handler_data; + size_t dma_drain_len; + void *dma_drain_buf; + unsigned char access_state; struct mutex state_mutex; enum scsi_device_state sdev_state; |