aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/libata.h
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2020-04-14 09:42:24 +0200
committerJens Axboe <axboe@kernel.dk>2020-04-22 10:47:35 -0600
commitcc97923a5bccc776851c242b61015faf288d5c22 (patch)
treed6510d4f326674e96bdf70c4f07472f492537db8 /include/linux/libata.h
parentscsi: merge scsi_init_sgtable into scsi_init_io (diff)
downloadlinux-dev-cc97923a5bccc776851c242b61015faf288d5c22.tar.xz
linux-dev-cc97923a5bccc776851c242b61015faf288d5c22.zip
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/linux/libata.h')
-rw-r--r--include/linux/libata.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index cffa4714bfa8..af832852e620 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1092,6 +1092,7 @@ extern int ata_scsi_ioctl(struct scsi_device *dev, unsigned int cmd,
#define ATA_SCSI_COMPAT_IOCTL /* empty */
#endif
extern int ata_scsi_queuecmd(struct Scsi_Host *h, struct scsi_cmnd *cmd);
+bool ata_scsi_dma_need_drain(struct request *rq);
extern int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *dev,
unsigned int cmd, void __user *arg);
extern bool ata_link_online(struct ata_link *link);
@@ -1387,6 +1388,7 @@ extern struct device_attribute *ata_common_sdev_attrs[];
.ioctl = ata_scsi_ioctl, \
ATA_SCSI_COMPAT_IOCTL \
.queuecommand = ata_scsi_queuecmd, \
+ .dma_need_drain = ata_scsi_dma_need_drain, \
.can_queue = ATA_DEF_QUEUE, \
.tag_alloc_policy = BLK_TAG_ALLOC_RR, \
.this_id = ATA_SHT_THIS_ID, \