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IB/mlx5: Fix error handling in reg_umr 

If ib_post_send fails when posting the UMR work request in reg_umr,
the code doesn't release the temporary pas buffer allocated, and
doesn't dma_unmap it.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Haggai Eran 2014-05-22 14:50:08 +03:00 committed by Roland Dreier
parent c7f44fbda6
commit 096f7e72c6
1 changed files with 17 additions and 16 deletions
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33
drivers/infiniband/hw/mlx5/mr.c
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@ -730,7 +730,7 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
struct mlx5_ib_mr *mr;
struct ib_sge sg;
int size = sizeof(u64) * npages;
int err;
int err = 0;
int i;
for (i = 0; i < 1; i++) {
@ -751,7 +751,7 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
mr->pas = kmalloc(size + MLX5_UMR_ALIGN - 1, GFP_KERNEL);
if (!mr->pas) {
err = -ENOMEM;
goto error;
goto free_mr;
}
mlx5_ib_populate_pas(dev, umem, page_shift,
@ -760,9 +760,8 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
mr->dma = dma_map_single(ddev, mr_align(mr->pas, MLX5_UMR_ALIGN), size,
DMA_TO_DEVICE);
if (dma_mapping_error(ddev, mr->dma)) {
kfree(mr->pas);
err = -ENOMEM;
goto error;
goto free_pas;
}
memset(&wr, 0, sizeof(wr));
@ -778,26 +777,28 @@ static struct mlx5_ib_mr *reg_umr(struct ib_pd *pd, struct ib_umem *umem,
err = ib_post_send(umrc->qp, &wr, &bad);
if (err) {
mlx5_ib_warn(dev, "post send failed, err %d\n", err);
up(&umrc->sem);
goto error;
goto unmap_dma;
}
wait_for_completion(&mr->done);
up(&umrc->sem);
dma_unmap_single(ddev, mr->dma, size, DMA_TO_DEVICE);
kfree(mr->pas);
if (mr->status != IB_WC_SUCCESS) {
mlx5_ib_warn(dev, "reg umr failed\n");
err = -EFAULT;
goto error;
}
unmap_dma:
up(&umrc->sem);
dma_unmap_single(ddev, mr->dma, size, DMA_TO_DEVICE);
free_pas:
kfree(mr->pas);
free_mr:
if (err) {
free_cached_mr(dev, mr);
return ERR_PTR(err);
}
return mr;
error:
free_cached_mr(dev, mr);
return ERR_PTR(err);
}
static struct mlx5_ib_mr *reg_create(struct ib_pd *pd, u64 virt_addr,