Change Details

Allow loading the same DMA address multiple times without any prior unload. The fixes a panic when running rping from userspace. panic: pctrie_insert: key is already present panic() pctrie_insert() linux_dma_map_sg_attrs() ib_umem_get() mr_umem_get() mlx5_ib_reg_user_mr() ib_uverbs_reg_mr() ib_uverbs_write() linux_file_write() dofilewrite() Sponsored by: Mellanox Technologies

Fix regression issues after r346645 in the LinuxKPI 1) Allow loading the same DMA address multiple times without any prior unload. 2) SG list must be mapped AS-IS without any optimisations. 3) sg_dma_len() must be equal to sg->length. Many drivers assume this. panic: pctrie_insert: key is already present panic() pctrie_insert() linux_dma_map_sg_attrs() ib_umem_get() mr_umem_get() mlx5_ib_reg_user_mr() ib_uverbs_reg_mr() ib_uverbs_write() linux_file_write() dofilewrite() Sponsored by: Mellanox Technologies

Fix regression issues after r346645 in the LinuxKPI 1) Allow loading the same DMA address multiple times without any prior unload. 2) SG list must be mapped AS-IS without any optimisations. 3) sg_dma_len() must be equal to sg->length. The fixes a panic when running rping from userspaceMany drivers assume this. panic: pctrie_insert: key is already present panic() pctrie_insert() linux_dma_map_sg_attrs() ib_umem_get() mr_umem_get() mlx5_ib_reg_user_mr() ib_uverbs_reg_mr() ib_uverbs_write() linux_file_write() dofilewrite() Sponsored by: Mellanox Technologies