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stm32h7/serial: Do not wait on TXDMA semaphore #11154

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Nov 8, 2023
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stm32h7/serial: Do not wait on TXDMA semaphore #11154

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8 changes: 5 additions & 3 deletions arch/arm/src/stm32h7/stm32_serial.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3369,9 +3369,11 @@ static void up_dma_txavailable(struct uart_dev_s *dev)

/* Only send when the DMA is idle */

nxsem_wait(&priv->txdmasem);

uart_xmitchars_dma(dev);
int rv = nxsem_trywait(&priv->txdmasem);
if (rv == OK)
{
uart_xmitchars_dma(dev);
}
}
#endif

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