[PATCHv10 9/9] scsi: set permanent stream count in block limits

[Keith Busch]

From: Keith Busch <kbusch at kernel.org>

The block limits exports the number of write hints, so set this limit if
the device reports support for the lifetime hints. Not only does this
inform the user of which hints are possible, it also allows scsi devices
supporting the feature to utilize the full range through raw block
device direct-io.

Reviewed-by: Bart Van Assche <bvanassche at acm.org>
Reviewed-by: Hannes Reinecke <hare at suse.de>
Signed-off-by: Keith Busch <kbusch at kernel.org>
---
 drivers/scsi/sd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index ca4bc0ac76adc..235dd6e5b6688 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -3768,6 +3768,8 @@ static int sd_revalidate_disk(struct gendisk *disk)
 		sd_config_protection(sdkp, &lim);
 	}
 
+	lim.max_write_hints = sdkp->permanent_stream_count;
+
 	/*
 	 * We now have all cache related info, determine how we deal
 	 * with flush requests.
-- 
2.43.5