From 33ddca08bf9d68086e3e9ad6bef06ce881777894 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Thu, 8 Sep 2016 15:03:24 +0000 Subject: [PATCH] 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: 5887ad43ee02 ("tty: serial: fsl_lpuart: Use cyclic DMA for Rx") Signed-off-by: Wei Yongjun Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index b21f3e541714..de9d5107c00a 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -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; -- GitLab