diff options
| author | Logan Gunthorpe <logang@deltatee.com> | 2020-07-24 20:25:12 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-07-29 08:45:20 +0300 |
| commit | 2bf5d3bbffad06639db518c8dcf8a14c7dce770e (patch) | |
| tree | 02bc202bfbaf5ab02a22566a8d6cc9a93bc3f056 /drivers | |
| parent | ece0278c1c96905c53a6cbb253927530fc707cfa (diff) | |
| download | linux-2bf5d3bbffad06639db518c8dcf8a14c7dce770e.tar.xz | |
nvme: clear any SGL flags in passthru commands
The host driver should decide whether to use SGLs or PRPs and they
currently assume the flags are cleared after the call to
nvme_setup_cmd(). However, passed-through commands may erroneously
set these bits; so clear them for all cases.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/nvme/host/core.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index c16bfdff2953..2818c17e92ed 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -604,6 +604,14 @@ static void nvme_assign_write_stream(struct nvme_ctrl *ctrl, req->q->write_hints[streamid] += blk_rq_bytes(req) >> 9; } +static void nvme_setup_passthrough(struct request *req, + struct nvme_command *cmd) +{ + memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd)); + /* passthru commands should let the driver set the SGL flags */ + cmd->common.flags &= ~NVME_CMD_SGL_ALL; +} + static inline void nvme_setup_flush(struct nvme_ns *ns, struct nvme_command *cmnd) { @@ -769,7 +777,7 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req, switch (req_op(req)) { case REQ_OP_DRV_IN: case REQ_OP_DRV_OUT: - memcpy(cmd, nvme_req(req)->cmd, sizeof(*cmd)); + nvme_setup_passthrough(req, cmd); break; case REQ_OP_FLUSH: nvme_setup_flush(ns, cmd); |