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| author | Huang Shijie <b32955@freescale.com> | 2014-01-22 16:23:37 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-13 10:18:48 -0800 |
| commit | 2ad28e3efee21a5bbf940c83d1f0395b76bd3efb (patch) | |
| tree | fef6300f24329e4a3f7a8543a31ee1c40a7e9e54 /drivers/tty | |
| parent | c972d806fddfb7852ce0d37d2ed14072b6de670b (diff) | |
| download | op-kernel-dev-2ad28e3efee21a5bbf940c83d1f0395b76bd3efb.zip op-kernel-dev-2ad28e3efee21a5bbf940c83d1f0395b76bd3efb.tar.gz | |
serial: imx: always wake up the processes in the TX callback
The current code only wakes up the processes when the circle
buffer has less data then the WAKEUP_CHARS.
But sometimes, the circle buffer may has data more then the WAKEUP_CHARS,
in such case, the processes will hang.
This patch makes it always wakes up the processes in the TX callback.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/imx.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index d799140..dff0f0a 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -496,8 +496,7 @@ static void dma_tx_callback(void *data) dev_dbg(sport->port.dev, "we finish the TX DMA.\n"); - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&sport->port); + uart_write_wakeup(&sport->port); if (waitqueue_active(&sport->dma_wait)) { wake_up(&sport->dma_wait); |
