Re: [PATCH] mlx5: Fix mlx5_ib_map_mr_sg mr length

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On 4/23/2017 2:31 PM, Sagi Grimberg wrote:
In case we got an initial sg_offset, we need to
account for it in the mr length.

Fixes: ff2ba9936591 ("IB/core: Add passing an offset into the SG to
ib_map_mr_sg")
Signed-off-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
---
 drivers/infiniband/hw/mlx5/mr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/mlx5/mr.c b/drivers/infiniband/hw/mlx5/mr.c
index b8f9382a8b7d..d9c6c0ea750b 100644
--- a/drivers/infiniband/hw/mlx5/mr.c
+++ b/drivers/infiniband/hw/mlx5/mr.c
@@ -1782,7 +1782,7 @@ mlx5_ib_sg_to_klms(struct mlx5_ib_mr *mr,
 		klms[i].va = cpu_to_be64(sg_dma_address(sg) + sg_offset);
 		klms[i].bcount = cpu_to_be32(sg_dma_len(sg) - sg_offset);
 		klms[i].key = cpu_to_be32(lkey);
-		mr->ibmr.length += sg_dma_len(sg);
+		mr->ibmr.length += sg_dma_len(sg) - sg_offset;

 		sg_offset = 0;
 	}


Israel,
Can you please test it with our regression test suite (SRP can send sg_offset != 0) and send Tested-By signature ?
Also run Laurence scenario with SG_GAPS patch applied too.

thanks,
Max.
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