nvme: fix directive command numd calculation

The numd field of directive receive command takes number of dwords to
transfer. This fix has the correct calculation for numd.

Signed-off-by: Kwan (Hingkwan) Huen-SSI <kwan.huen@samsung.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 6212cf4..37046ac 100644 (file)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -336,7 +336,7 @@ static int nvme_get_stream_params(struct nvme_ctrl *ctrl,
 
        c.directive.opcode = nvme_admin_directive_recv;
        c.directive.nsid = cpu_to_le32(nsid);
-       c.directive.numd = cpu_to_le32(sizeof(*s));
+       c.directive.numd = cpu_to_le32((sizeof(*s) >> 2) - 1);
        c.directive.doper = NVME_DIR_RCV_ST_OP_PARAM;
        c.directive.dtype = NVME_DIR_STREAMS;