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| author | Frederic Barrat <fbarrat@linux.ibm.com> | 2021-05-26 16:45:40 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-06-01 11:17:08 +1000 |
| commit | 59cc84c802eb923805e7bba425976a3df5ce35d8 (patch) | |
| tree | 3d84115b08a05ae52da71ebafaa50eb69f3904ba /drivers/iio/adc/ad7923.c | |
| parent | 1438709e6328925ef496dafd467dbd0353137434 (diff) | |
Revert "powerpc/kernel/iommu: Align size for IOMMU_PAGE_SIZE() to save TCEs"
This reverts commit 3c0468d4451eb6b4f6604370639f163f9637a479.
That commit was breaking alignment guarantees for the DMA address when
allocating coherent mappings, as described in
Documentation/core-api/dma-api-howto.rst
It was also noticed by Mellanox' driver:
[ 1515.763621] mlx5_core c002:01:00.0: mlx5_frag_buf_alloc_node:146:(pid 13402): unexpected map alignment: 0x0800000000c61000, page_shift=16
[ 1515.763635] mlx5_core c002:01:00.0: mlx5_cqwq_create:181:(pid
13402): mlx5_frag_buf_alloc_node() failed, -12
Fixes: 3c0468d4451e ("powerpc/kernel/iommu: Align size for IOMMU_PAGE_SIZE() to save TCEs")
Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210526144540.117795-1-fbarrat@linux.ibm.com
Diffstat (limited to 'drivers/iio/adc/ad7923.c')
0 files changed, 0 insertions, 0 deletions