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nvmet: use flex_array_size and struct_size 

In an effort to avoid open-coded arithmetic in the kernel [1], use the
flex_array_size() and struct_size() helpers instead of an open-coded
calculation.

[1] https://github.com/KSPP/linux/issues/160

Signed-off-by: Len Baker <len.baker@gmx.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Len Baker 2021-10-24 19:29:21 +02:00 committed by Christoph Hellwig
parent 2953b30b1d
commit d156cfcafb
2 changed files with 2 additions and 2 deletions
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2
drivers/nvme/host/multipath.c
View File

@ -562,7 +562,7 @@ static int nvme_parse_ana_log(struct nvme_ctrl *ctrl, void *data,
return -EINVAL;
nr_nsids = le32_to_cpu(desc->nnsids);
nsid_buf_size = nr_nsids * sizeof(__le32);
nsid_buf_size = flex_array_size(desc, nsids, nr_nsids);
if (WARN_ON_ONCE(desc->grpid == 0))
return -EINVAL;

2
drivers/nvme/target/admin-cmd.c
View File

@ -264,7 +264,7 @@ static u32 nvmet_format_ana_group(struct nvmet_req *req, u32 grpid,
desc->chgcnt = cpu_to_le64(nvmet_ana_chgcnt);
desc->state = req->port->ana_state[grpid];
memset(desc->rsvd17, 0, sizeof(desc->rsvd17));
return sizeof(struct nvme_ana_group_desc) + count * sizeof(__le32);
return struct_size(desc, nsids, count);
}
static void nvmet_execute_get_log_page_ana(struct nvmet_req *req)