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Commit 33ddca08 authored by Wei Yongjun's avatar Wei Yongjun Committed by Greg Kroah-Hartman
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tty: serial: fsl_lpuart: use GFP_ATOMIC under spin lock 



The function lpuart_start_rx_dma() is called from several
places, in some of which, such as lpuart_startup(), a lock
be held here, so we should use GFP_ATOMIC when a lock is held.

Fixes: 5887ad43 ("tty: serial: fsl_lpuart: Use cyclic DMA for Rx")
Signed-off-by: default avatarWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent c164b008

drivers/tty/serial/fsl_lpuart.c

+1 −1
Original line number Diff line number Diff line
@@ -852,7 +852,7 @@ static inline int lpuart_start_rx_dma(struct lpuart_port *sport) 
	if (sport->rx_dma_rng_buf_len < 16)

		sport->rx_dma_rng_buf_len = 16;



	ring->buf = kmalloc(sport->rx_dma_rng_buf_len, GFP_KERNEL);

	ring->buf = kmalloc(sport->rx_dma_rng_buf_len, GFP_ATOMIC);

	if (!ring->buf) {

		dev_err(sport->port.dev, "Ring buf alloc failed\n");

		return -ENOMEM;