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hw/block/nvme: flush write cache when disabled 

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>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200706061303.246057-11-its@irrelevant.dk>
This commit is contained in:
Klaus Jensen 2020-07-06 08:12:55 +02:00
parent 46ac29c38b
commit d21d37f5ab
1 changed files with 4 additions and 0 deletions
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4
hw/block/nvme.c
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@ -1181,6 +1181,10 @@ 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: