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| author |   Stephen Warren <swarren@nvidia.com> | 2019-01-03 10:23:23 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2019-01-07 05:14:17 -0800 |
| commit | f65e192af35058e5c82da9e90871b472d24912bc (patch) | |
| tree | b6caf85193c35b0a88a5a0fa8aa180d956e2eeea /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | ipv6: Take rcu_read_lock in __inet6_bind for mapped addresses (diff) | |
| download | linux-rng-f65e192af35058e5c82da9e90871b472d24912bc.tar.xz linux-rng-f65e192af35058e5c82da9e90871b472d24912bc.zip | |
net/mlx4: Get rid of page operation after dma_alloc_coherent
This patch solves a crash at the time of mlx4 driver unload or system
shutdown. The crash occurs because dma_alloc_coherent() returns one
value in mlx4_alloc_icm_coherent(), but a different value is passed to
dma_free_coherent() in mlx4_free_icm_coherent(). In turn this is because
when allocated, that pointer is passed to sg_set_buf() to record it,
then when freed it is re-calculated by calling
lowmem_page_address(sg_page()) which returns a different value. Solve
this by recording the value that dma_alloc_coherent() returns, and
passing this to dma_free_coherent().
This patch is roughly equivalent to commit 378efe798ecf ("RDMA/hns: Get
rid of page operation after dma_alloc_coherent").
Based-on-code-from: Christoph Hellwig <hch@lst.de>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions