diff mbox series

[v2,09/18] hw/block/nvme: flush write cache when disabled

Message ID 20200703063420.2241014-10-its@irrelevant.dk (mailing list archive)
State New, archived
Headers show
Series hw/block/nvme: bump to v1.3 | expand

Commit Message

Klaus Jensen July 3, 2020, 6:34 a.m. UTC 
From: Klaus Jensen <k.jensen@samsung.com>

If the write cache is disabled with a Set Features command, flush it if
currently enabled.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
---
 hw/block/nvme.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 3eac1e231bf9..f3a5b857bc92 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -1152,6 +1152,10 @@  static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
 
         break;
     case NVME_VOLATILE_WRITE_CACHE:
+        if (!(dw11 & 0x1) && blk_enable_write_cache(n->conf.blk)) {
+            blk_flush(n->conf.blk);
+        }
+
         blk_set_enable_write_cache(n->conf.blk, dw11 & 1);
         break;
     case NVME_NUMBER_OF_QUEUES: