[PATCH 5.10 332/545] RDMA/rtrs: Define MIN_CHUNK_SIZE

Greg Kroah-Hartman
2022-08-19T16:26:30Z

From: Gioh Kim <gi-oh.kim@cloud.ionos.com>

[ Upstream commit 3f3d0eabc14b6ea1fcbe85a60ee9d44e2b930b8a ]

Define MIN_CHUNK_SIZE to replace the hard-coding number.
We need 4k for metadata, so MIN_CHUNK_SIZE should be at least 8k.

Link: https://lore.kernel.org/r/20210528113018.52290-7-jinpu.wang@ionos.com
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/ulp/rtrs/rtrs-pri.h | 1 +
drivers/infiniband/ulp/rtrs/rtrs-srv.c | 4 ++--
2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-pri.h b/drivers/infiniband/ulp/rtrs/rtrs-pri.h
index 51c60f542876..333de9d52172 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-pri.h
+++ b/drivers/infiniband/ulp/rtrs/rtrs-pri.h
@@ -56,6 +56,7 @@ enum {
* somewhere between 1 and 65536 and it depends on the system.
*/
MAX_SESS_QUEUE_DEPTH = 65536,
+ MIN_CHUNK_SIZE = 8192,

RTRS_HB_INTERVAL_MS = 5000,
RTRS_HB_MISSED_MAX = 5,
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index b033bfa9f383..b152a742cd3c 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -2193,9 +2193,9 @@ static int check_module_params(void)
sess_queue_depth, 1, MAX_SESS_QUEUE_DEPTH);
return -EINVAL;
}
- if (max_chunk_size < 4096 || !is_power_of_2(max_chunk_size)) {
+ if (max_chunk_size < MIN_CHUNK_SIZE || !is_power_of_2(max_chunk_size)) {
pr_err("Invalid max_chunk_size value %d, has to be >= %d and should be power of two.\n",
- max_chunk_size, 4096);
+ max_chunk_size, MIN_CHUNK_SIZE);
return -EINVAL;
}

--
2.35.1