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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: 5887ad43ee ("tty: serial: fsl_lpuart: Use cyclic DMA for Rx")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wei Yongjun 2016-09-08 15:03:24 +00:00 committed by Greg Kroah-Hartman
parent c164b008b6
commit 33ddca08bf
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/serial/fsl_lpuart.c
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@ -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;