diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2019-01-07 17:23:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-08 16:56:52 +0100 |
| commit | 11b3770d54b28dcd905155a6d4aa551187ff00eb (patch) | |
| tree | 57bcf1908945f23495dca5d41191da4af7a444eb /drivers/tty | |
| parent | serial: max310x: Use struct_size() in devm_kzalloc() (diff) | |
| download | linux-11b3770d54b28dcd905155a6d4aa551187ff00eb.tar.xz linux-11b3770d54b28dcd905155a6d4aa551187ff00eb.zip | |
serial: sh-sci: Extract sci_dma_rx_chan_invalidate()
The cookies and channel pointer for the DMA receive channel are
invalidated in two places, and one more is planned.
Extract this functionality in a common helper.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 8df0fd824520..4c75468680cb 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1243,12 +1243,22 @@ static int sci_dma_rx_find_active(struct sci_port *s) return -1; } +static void sci_dma_rx_chan_invalidate(struct sci_port *s) +{ + unsigned int i; + + s->chan_rx = NULL; + for (i = 0; i < ARRAY_SIZE(s->cookie_rx); i++) + s->cookie_rx[i] = -EINVAL; + s->active_rx = 0; +} + static void sci_rx_dma_release(struct sci_port *s) { struct dma_chan *chan = s->chan_rx_saved; - s->chan_rx_saved = s->chan_rx = NULL; - s->cookie_rx[0] = s->cookie_rx[1] = -EINVAL; + s->chan_rx_saved = NULL; + sci_dma_rx_chan_invalidate(s); dmaengine_terminate_sync(chan); dma_free_coherent(chan->device->dev, s->buf_len_rx * 2, s->rx_buf[0], sg_dma_address(&s->sg_rx[0])); @@ -1367,10 +1377,7 @@ fail: spin_lock_irqsave(&port->lock, flags); if (i) dmaengine_terminate_async(chan); - for (i = 0; i < 2; i++) - s->cookie_rx[i] = -EINVAL; - s->active_rx = 0; - s->chan_rx = NULL; + sci_dma_rx_chan_invalidate(s); sci_start_rx(port); if (!port_lock_held) spin_unlock_irqrestore(&port->lock, flags); |