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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2015-08-21 20:02:45 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-04 17:33:48 +0100 |
| commit | 565dd11aa786765458cca2231e7278b46b996051 (patch) | |
| tree | eacd9fbae87e6693682fcf04f0ddb7bcc8534d9d /drivers/tty/serial/sh-sci.c | |
| parent | 3e14670c06968554c67b36d05e8c52c36c14671a (diff) | |
| download | op-kernel-dev-565dd11aa786765458cca2231e7278b46b996051.zip op-kernel-dev-565dd11aa786765458cca2231e7278b46b996051.tar.gz | |
serial: sh-sci: Switch to generic DMA residue handling
Convert the SCI driver from the SHDMAE-specific partial DMA transfer
handling to the generic dmaengine residual data framework.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/sh-sci.c')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 294b283..049036d 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1438,6 +1438,8 @@ static void work_fn_rx(struct work_struct *work) struct sci_port *s = container_of(work, struct sci_port, work_rx); struct uart_port *port = &s->port; struct dma_async_tx_descriptor *desc; + struct dma_tx_state state; + enum dma_status status; int new; if (s->active_rx == s->cookie_rx[0]) { @@ -1451,21 +1453,21 @@ static void work_fn_rx(struct work_struct *work) } desc = s->desc_rx[new]; - if (dma_async_is_tx_complete(s->chan_rx, s->active_rx, NULL, NULL) != - DMA_COMPLETE) { + status = dmaengine_tx_status(s->chan_rx, s->active_rx, &state); + if (status != DMA_COMPLETE) { /* Handle incomplete DMA receive */ struct dma_chan *chan = s->chan_rx; - struct shdma_desc *sh_desc = container_of(desc, - struct shdma_desc, async_tx); unsigned long flags; + unsigned int read; int count; dmaengine_terminate_all(chan); - dev_dbg(port->dev, "Read %zu bytes with cookie %d\n", - sh_desc->partial, sh_desc->cookie); + read = sg_dma_len(&s->sg_rx[new]) - state.residue; + dev_dbg(port->dev, "Read %u bytes with cookie %d\n", read, + s->active_rx); spin_lock_irqsave(&port->lock, flags); - count = sci_dma_rx_push(s, sh_desc->partial); + count = sci_dma_rx_push(s, read); spin_unlock_irqrestore(&port->lock, flags); if (count) |
