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Commit 8c4210e3 authored by Sonic Zhang's avatar Sonic Zhang Committed by Linus Torvalds
Browse files

Fix DMA rx ring buffer handling 



Reported-by: default avatarQian Zhang <zhangq@sansitech.com>
Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
Signed-off-by: default avatarAlan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent df04baf1

drivers/serial/bfin_5xx.c

+3 −1
Original line number Diff line number Diff line
@@ -401,9 +401,11 @@ static void bfin_serial_dma_rx_chars(struct bfin_serial_port *uart) 
	else

		flg = TTY_NORMAL;



	for (i = uart->rx_dma_buf.tail; i != uart->rx_dma_buf.head; i++) {

	for (i = uart->rx_dma_buf.tail; ; i++) {

		if (i >= UART_XMIT_SIZE)

			i = 0;

		if (i == uart->rx_dma_buf.head)

			break;

		if (!uart_handle_sysrq_char(&uart->port, uart->rx_dma_buf.buf[i]))

			uart_insert_char(&uart->port, status, OE,

				uart->rx_dma_buf.buf[i], flg);