Commit fb4f2e04 authored by Erwan Le Ray's avatar Erwan Le Ray Committed by Greg Kroah-Hartman
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serial: stm32: fix tx dma completion, release channel 



This patch add a proper release of dma channels when completing dma tx.

Fixes: 34891872 ("serial: stm32: adding dma support")
Signed-off-by: default avatarErwan Le Ray <erwan.leray@foss.st.com>
Link: https://lore.kernel.org/r/20210304162308.8984-9-erwan.leray@foss.st.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 436c9793

drivers/tty/serial/stm32-usart.c

+1 −0
Original line number Diff line number Diff line
@@ -292,6 +292,7 @@ static void stm32_usart_tx_dma_complete(void *arg) 
	struct stm32_port *stm32port = to_stm32_port(port);

	const struct stm32_usart_offsets *ofs = &stm32port->info->ofs;



	dmaengine_terminate_async(stm32port->tx_ch);

	stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT);

	stm32port->tx_dma_busy = false;