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authorChristoph Hellwig <hch@lst.de>2014-11-03 14:09:02 +0100
committerChristoph Hellwig <hch@lst.de>2014-11-12 11:19:43 +0100
commit2ecb204d07ac8debe3893c362415919bc78bebd6 (patch)
treeeef99b324201b21de358dffdab8bfc0453358d5f /drivers/scsi/isci
parente2eddf4d530df745019fded0fedfb78f6d3e33ca (diff)
downloadop-kernel-dev-2ecb204d07ac8debe3893c362415919bc78bebd6.zip
op-kernel-dev-2ecb204d07ac8debe3893c362415919bc78bebd6.tar.gz
scsi: always assign block layer tags if enabled
Allow a driver to ask for block layer tags by setting .use_blk_tags in the host template, in which case it will always see a valid value in request->tag, similar to the behavior when using blk-mq. This means even SCSI "untagged" commands will now have a tag, which is especially useful when using a host-wide tag map. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de>
Diffstat (limited to 'drivers/scsi/isci')
-rw-r--r--drivers/scsi/isci/init.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/isci/init.c b/drivers/scsi/isci/init.c
index 2e890b1..8975620 100644
--- a/drivers/scsi/isci/init.c
+++ b/drivers/scsi/isci/init.c
@@ -172,6 +172,7 @@ static struct scsi_host_template isci_sht = {
.target_destroy = sas_target_destroy,
.ioctl = sas_ioctl,
.shost_attrs = isci_host_attrs,
+ .use_blk_tags = 1,
};
static struct sas_domain_function_template isci_transport_ops = {
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