diff options
| -rw-r--r-- | drivers/nvme/target/core.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index aecb5853f8da..560b6bbb6c44 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -695,11 +695,10 @@ static void nvmet_update_sq_head(struct nvmet_req *req) if (req->sq->size) { u32 old_sqhd, new_sqhd; + old_sqhd = READ_ONCE(req->sq->sqhd); do { - old_sqhd = req->sq->sqhd; new_sqhd = (old_sqhd + 1) % req->sq->size; - } while (cmpxchg(&req->sq->sqhd, old_sqhd, new_sqhd) != - old_sqhd); + } while (!try_cmpxchg(&req->sq->sqhd, &old_sqhd, new_sqhd)); } req->cqe->sq_head = cpu_to_le16(req->sq->sqhd & 0x0000FFFF); } |