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| author |   Valentin Caron <valentin.caron@foss.st.com> | 2023-08-08 18:19:01 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-22 15:28:51 +0200 |
| commit | db89728abad5ab6b8f30349142897bd55f1f5b00 (patch) | |
| tree | 1995cea65079a18c75aafedb41b71f7c65701dc9 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | tty: n_gsm: add restart flag to extended ioctl config (diff) | |
| download | linux-rng-db89728abad5ab6b8f30349142897bd55f1f5b00.tar.xz linux-rng-db89728abad5ab6b8f30349142897bd55f1f5b00.zip | |
serial: stm32: avoid clearing DMAT bit during transfer
It's rather advised to rely on DMA pause / resume instead of
clearing/setting DMA request enable bit for the same purpose. Some DMA
request/acknowledge race may encountered by doing so. We prefer to use
dmaengine_pause and resume instead to pause a dma transfer when it is
necessary.
It is also safer to close DMA before reset DMAT in stm32_usart_shutdown.
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20230808161906.178996-2-valentin.caron@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions