lkml.org 
[lkml]   [2016]   [Mar]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 6/8] sd: inform block layer of write cache state
Date
Signed-off-by: Jens Axboe <axboe@fb.com>
---
drivers/scsi/sd.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 5a5457ac9cdb..049f424fb4ad 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -192,6 +192,7 @@ cache_type_store(struct device *dev, struct device_attribute *attr,
sdkp->WCE = wce;
sdkp->RCD = rcd;
sd_set_flush_flag(sdkp);
+ blk_queue_write_cache(sdp->request_queue, wce != 0);
return count;
}

@@ -2571,7 +2572,7 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer)
sdkp->DPOFUA ? "supports DPO and FUA"
: "doesn't support DPO or FUA");

- return;
+ goto done;
}

bad_sense:
@@ -2596,6 +2597,8 @@ defaults:
}
sdkp->RCD = 0;
sdkp->DPOFUA = 0;
+done:
+ blk_queue_write_cache(sdp->request_queue, sdkp->WCE != 0);
}

/*
--
2.4.1.168.g1ea28e1
\
 
 \ /
  Last update: 2016-03-23 17:01    [W:0.045 / U:1.584 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site