On Tue, Dec 29, 2015 at 10:45:03AM +0100, Bart Van Assche wrote:
> Detected this by building the IB core with W=1. See also patch
> "IB core: Fix ib_sg_to_pages()" (commit 8f5ba10ed40a).
Reviewed-by: Leon Romanovsky <leon.romanov...@mellanox.com>
>
> Signed-off-by: Bart Van Assche <bart.vanass...@sandisk.com>
> Cc: Sagi Grimberg <sa...@mellanox.com>
> Cc: Christoph Hellwig <h...@lst.de>
> ---
> drivers/infiniband/core/verbs.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
> index 545906d..c90ed29 100644
> --- a/drivers/infiniband/core/verbs.c
> +++ b/drivers/infiniband/core/verbs.c
> @@ -1530,7 +1530,7 @@ int ib_sg_to_pages(struct ib_mr *mr,
> int (*set_page)(struct ib_mr *, u64))
> {
> struct scatterlist *sg;
> - u64 last_end_dma_addr = 0, last_page_addr = 0;
> + u64 last_end_dma_addr = 0;
> unsigned int last_page_off = 0;
> u64 page_mask = ~((u64)mr->page_size - 1);
> int i, ret;
> @@ -1572,7 +1572,6 @@ next_page:
>
> mr->length += dma_len;
> last_end_dma_addr = end_dma_addr;
> - last_page_addr = end_dma_addr & page_mask;
> last_page_off = end_dma_addr & ~page_mask;
> }
>
> --
> 2.1.4
>
> --
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