Re: [PATCH 1/2] serial: stm32: reset dma buffers during probe
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-05-27 09:49:06
Also in:
linux-arm-kernel, lkml
On Thu, May 27, 2021 at 11:15:36AM +0200, Erwan Le Ray wrote:
quoted hunk ↗ jump to hunk
Reset Rx and Tx dma buffers during probe to avoid freeing invalid buffer in no dma mode. Signed-off-by: Erwan Le Ray <redacted>diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index c2ae7b392b86..2ac3b30477a7 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c@@ -1168,6 +1168,8 @@ static struct stm32_port *stm32_usart_of_get_port(struct platform_device *pdev) stm32_ports[id].cr1_irq = USART_CR1_RXNEIE; stm32_ports[id].cr3_irq = 0; stm32_ports[id].last_res = RX_BUF_L; + stm32_ports[id].rx_dma_buf = 0; + stm32_ports[id].tx_dma_buf = 0; return &stm32_ports[id]; }-- 2.17.1
Is this a bugfix? if so, what commit does this fix and does it need to be backported anywhere? thanks, greg k-h