linux/drivers/infiniband
Jack Wang b66905e04d RDMA/rtrs-clt: Use the right sg_cnt after ib_dma_map_sg
When iommu is enabled, we hit warnings like this:
WARNING: at rtrs/rtrs.c:178 rtrs_iu_post_rdma_write_imm+0x9b/0x110

rtrs warn on one sge entry length is 0, which is unexpected.

The problem is ib_dma_map_sg augments the SGL into a 'dma mapped SGL'.
This process may change the number of entries and the lengths of each
entry.

Code that touches dma_address is iterating over the 'dma mapped SGL'
and must use dma_nents which returned from ib_dma_map_sg().
So pass the count return from ib_dma_map_sg.

Fixes: 6a98d71dae ("RDMA/rtrs: client: main functionality")
Link: https://lore.kernel.org/r/20220818105355.110344-3-haris.iqbal@ionos.com
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Reviewed-by: Aleksei Marov <aleksei.marov@ionos.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
2022-08-21 12:25:03 +03:00
..
core RDMA: Handle the return code from dma_resv_wait_timeout() properly 2022-08-16 17:13:23 +03:00
hw RDMA/erdma: Correct the max_qp and max_cq capacities of the device 2022-08-16 16:29:12 +03:00
sw RDMA/rxe: Fix error unwind in rxe_create_qp() 2022-08-02 14:29:41 -03:00
ulp RDMA/rtrs-clt: Use the right sg_cnt after ib_dma_map_sg 2022-08-21 12:25:03 +03:00
Kconfig RDMA/erdma: Add driver to kernel build environment 2022-07-27 16:04:05 -03:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00