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RDMA/hns: Fix return value in hns_roce_map_mr_sg

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[ Upstream commit 203b70fda6 ]

As described in the ib_map_mr_sg function comment, it returns the number
of sg elements that were mapped to the memory region. However,
hns_roce_map_mr_sg returns the number of pages required for mapping the
DMA area. Fix it.

Fixes: 9b2cf76c9f ("RDMA/hns: Optimize PBL buffer allocation process")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Link: https://lore.kernel.org/r/20240411033851.2884771-1-shaozhengchao@huawei.com
Reviewed-by: Junxian Huang <huangjunxian6@hisilicon.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhengchao Shao 2024-04-11 11:38:51 +08:00 committed by Greg Kroah-Hartman
parent bb3ee9d71c
commit eae28a9e86
1 changed files with 7 additions and 8 deletions
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15
drivers/infiniband/hw/hns/hns_roce_mr.c
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@ -433,18 +433,18 @@ int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
struct ib_device *ibdev = &hr_dev->ib_dev;
struct hns_roce_mr *mr = to_hr_mr(ibmr);
struct hns_roce_mtr *mtr = &mr->pbl_mtr;
int ret = 0;
int ret, sg_num = 0;
mr->npages = 0;
mr->page_list = kvcalloc(mr->pbl_mtr.hem_cfg.buf_pg_count,
sizeof(dma_addr_t), GFP_KERNEL);
if (!mr->page_list)
return ret;
return sg_num;
ret = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, hns_roce_set_page);
if (ret < 1) {
sg_num = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, hns_roce_set_page);
if (sg_num < 1) {
ibdev_err(ibdev, "failed to store sg pages %u %u, cnt = %d.\n",
mr->npages, mr->pbl_mtr.hem_cfg.buf_pg_count, ret);
mr->npages, mr->pbl_mtr.hem_cfg.buf_pg_count, sg_num);
goto err_page_list;
}
@ -455,17 +455,16 @@ int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents,
ret = hns_roce_mtr_map(hr_dev, mtr, mr->page_list, mr->npages);
if (ret) {
ibdev_err(ibdev, "failed to map sg mtr, ret = %d.\n", ret);
ret = 0;
sg_num = 0;
} else {
mr->pbl_mtr.hem_cfg.buf_pg_shift = (u32)ilog2(ibmr->page_size);
ret = mr->npages;
}
err_page_list:
kvfree(mr->page_list);
mr->page_list = NULL;
return ret;
return sg_num;
}
static void hns_roce_mw_free(struct hns_roce_dev *hr_dev,