[riot-notifications] [RIOT-OS/RIOT] cpu/stm32_common: fix DMA releasing in UART driver (#10942)
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Mon Feb 4 23:37:20 CET 2019
### Contribution description
This releases the DMA after disabling UART transfer instead of before.
Without this patch, when printing from different threads, the UART could get stuck because one thread would disable DMA while another one was printing.
### Testing procedure
Let different threads print simultaneously and check it does not get stuck.
You can view, comment on, or merge this pull request online at:
-- Commit Summary --
* cpu/stm32_common: fix DMA releasing in UART driver
-- File Changes --
M cpu/stm32_common/periph/uart.c (2)
-- Patch Links --
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