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RDMA/mlx4: use kzalloc() for the fast registration page list

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mlx4_alloc_priv_pages() allocates a zeroed, page-sized buffer for a
DMA-to-device page list. kmalloc() provides the required physical
contiguity, and a PAGE_SIZE allocation retains the alignment needed to
keep the list within one page.

Use kzalloc() for the buffer and kfree() on the error and teardown paths.

Link: https://patch.msgid.link/20260715-get_pages-to-kmalloc-v1-2-b0b7fce288be@nvidia.com
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
This commit is contained in:
Leon Romanovsky 2026-07-16 05:03:31 -04:00 committed by Leon Romanovsky
parent 1318e3c33f
commit ce5322367c
1 changed files with 3 additions and 3 deletions
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6
drivers/infiniband/hw/mlx4/mr.c
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@ -313,7 +313,7 @@ mlx4_alloc_priv_pages(struct ib_device *device,
MLX4_MR_PAGES_ALIGN);
/* Prevent cross page boundary allocation. */
mr->pages = (__be64 *)get_zeroed_page(GFP_KERNEL);
mr->pages = kzalloc(PAGE_SIZE, GFP_KERNEL);
if (!mr->pages)
return -ENOMEM;
@ -328,7 +328,7 @@ mlx4_alloc_priv_pages(struct ib_device *device,
return 0;
err:
free_page((unsigned long)mr->pages);
kfree(mr->pages);
return ret;
}
@ -340,7 +340,7 @@ mlx4_free_priv_pages(struct mlx4_ib_mr *mr)
dma_unmap_single(device->dev.parent, mr->page_map,
mr->page_map_size, DMA_TO_DEVICE);
free_page((unsigned long)mr->pages);
kfree(mr->pages);
mr->pages = NULL;
}
}