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| author | Frank Li <Frank.Li@nxp.com> | 2026-05-21 11:32:48 -0400 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2026-06-30 16:42:30 +0530 |
| commit | af900b7dc1e1cdac571ac38e7fee80f1a1776a62 (patch) | |
| tree | c460a37c6b855485477bbc8ed93e90b384ea38bc /tools/perf/scripts/python/stackcollapse.py | |
| parent | 796bdb33e86aec8504bf8868e0665f120638ac72 (diff) | |
dmaengine: Add safe API to combine configuration and preparation
Introduce dmaengine_prep_config_single_safe() and
dmaengine_prep_config_sg_safe() to provide a reentrant-safe way to
combine slave configuration and transfer preparation.
Drivers may implement the new device_prep_config_sg() callback to perform
both steps atomically. If the callback is not provided, the helpers fall
back to calling dmaengine_slave_config() followed by
dmaengine_prep_slave_sg() under per-channel spinlock protection.
Tested-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260521-dma_prep_config-v7-2-1f73f4899883@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions