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author | Zhengchao Shao <shaozhengchao@huawei.com> | 2024-04-11 06:38:51 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-30 10:49:42 +0300 |
commit | eae28a9e86089d2445243582abe1c263735871cd (patch) | |
tree | 50ab9ba0b42369a6b0bd50fd12cad38a32c361fa | |
parent | bb3ee9d71cdcce67c785e0ce37fb8d5ad9d0caef (diff) | |
download | linux-eae28a9e86089d2445243582abe1c263735871cd.tar.xz |
RDMA/hns: Fix return value in hns_roce_map_mr_sg
[ Upstream commit 203b70fda63425a4eb29f03f9074859afe821a39 ]
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: 9b2cf76c9f05 ("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>
-rw-r--r-- | drivers/infiniband/hw/hns/hns_roce_mr.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c index 91cd580480fe..0d42fd197c11 100644 --- a/drivers/infiniband/hw/hns/hns_roce_mr.c +++ b/drivers/infiniband/hw/hns/hns_roce_mr.c @@ -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, |