From 51ad06cd698cb9ff280a769ed8d57210a1d2266d Mon Sep 17 00:00:00 2001 From: Kanchan Joshi Date: Tue, 27 Apr 2021 12:17:47 +0530 Subject: [PATCH] nvme: avoid memset for passthrough requests nvme_clear_nvme_request() clears the nvme_command, which is unncessary for passthrough requests as nvme_command is overwritten immediately. Move clearing part from this helper to the caller, so that double memset for passthrough requests is avoided. Signed-off-by: Kanchan Joshi Signed-off-by: Christoph Hellwig --- drivers/nvme/host/core.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index f2d1f2d699b8..61e122cecc2a 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -589,9 +589,6 @@ EXPORT_SYMBOL_NS_GPL(nvme_put_ns, NVME_TARGET_PASSTHRU); static inline void nvme_clear_nvme_request(struct request *req) { - struct nvme_command *cmd = nvme_req(req)->cmd; - - memset(cmd, 0, sizeof(*cmd)); nvme_req(req)->retries = 0; nvme_req(req)->flags = 0; req->rq_flags |= RQF_DONTPREP; @@ -903,8 +900,10 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req) struct nvme_command *cmd = nvme_req(req)->cmd; blk_status_t ret = BLK_STS_OK; - if (!(req->rq_flags & RQF_DONTPREP)) + if (!(req->rq_flags & RQF_DONTPREP)) { nvme_clear_nvme_request(req); + memset(cmd, 0, sizeof(*cmd)); + } switch (req_op(req)) { case REQ_OP_DRV_IN: -- GitLab