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arch/arm/src/stm32f7/stm32_serial.c: force invalidate of data cache after DMA re-enable when returning from low-power mode

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This commit is contained in:
Juha Niskanen 2018-10-09 06:35:43 -06:00 committed by Gregory Nutt
parent 68c8a4c5a2
commit 167663462f
1 changed files with 7 additions and 4 deletions
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7
arch/arm/src/stm32f7/stm32_serial.c
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@ -2628,11 +2628,14 @@ static void up_dma_reenable(struct up_dev_s *priv)
RXDMA_BUFFER_SIZE,
SERIAL_DMA_CONTROL_WORD);
/* Reset our DMA shadow pointer to match the address just
* programmed above.
/* Reset our DMA shadow pointer and Rx data availability count to match
* the address just programmed above.
*/
priv->rxdmanext = 0;
#ifdef CONFIG_ARMV7M_DCACHE
priv->rxdmaavail = 0;
#endif
/* Start the DMA channel, and arrange for callbacks at the half and
* full points in the FIFO. This ensures that we have half a FIFO