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IB/mlx5: Fix UMR size calculation

Translation table updates of large UMR may require multiple post send
operations. The last operations can be in various lengths, but current
code set them to be the same length.

Fixes: 7d0cc6edcc70 ('IB/mlx5: Add MR cache for large UMR regions')
Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Artemy Kovalyov 8 years ago
parent
bd174fc2ca
commit
438b228e03
1 changed files with 2 additions and 1 deletions
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  1. 2 1
      drivers/infiniband/hw/mlx5/mr.c

+ 2 - 1
drivers/infiniband/hw/mlx5/mr.c
View File 

@@ -1045,8 +1045,9 @@ int mlx5_ib_update_xlt(struct mlx5_ib_mr *mr, u64 idx, int npages,
 
 	for (pages_mapped = 0;
 
 	for (pages_mapped = 0;
 
 	     pages_mapped < pages_to_map && !err;
 
 	     pages_mapped < pages_to_map && !err;
 
 	     pages_mapped += pages_iter, idx += pages_iter) {
 
 	     pages_mapped += pages_iter, idx += pages_iter) {
 
+		npages = min_t(int, pages_iter, pages_to_map - pages_mapped);
 
 		dma_sync_single_for_cpu(ddev, dma, size, DMA_TO_DEVICE);
 
 		dma_sync_single_for_cpu(ddev, dma, size, DMA_TO_DEVICE);
 
-		npages = populate_xlt(mr, idx, pages_iter, xlt,
 
+		npages = populate_xlt(mr, idx, npages, xlt,
 
 				      page_shift, size, flags);
 
 				      page_shift, size, flags);
 
 
 
 		dma_sync_single_for_device(ddev, dma, size, DMA_TO_DEVICE);
 
 		dma_sync_single_for_device(ddev, dma, size, DMA_TO_DEVICE);