Messages in this thread Patch in this message | | | From | Bryan Wu <> | Subject | [PATCH 8/9] Blackfin Serial Driver: fix a in dma circle rx buffer handling | Date | Fri, 17 Oct 2008 01:44:06 +0800 |
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From: Sonic Zhang <sonic.zhang@analog.com>
Reported-by: Qian Zhang <zhangq@sansitech.com> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> --- drivers/serial/bfin_5xx.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c index 350bfc4..1e027e3 100644 --- a/drivers/serial/bfin_5xx.c +++ b/drivers/serial/bfin_5xx.c @@ -402,9 +402,11 @@ 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); -- 1.5.6
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