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tty: serial: imx: remove dead code imx_dma_rxint 

Since commit 4dec2f119e ("imx-serial: RX DMA startup latency")
the interrupt routine no longer will start rx dma.

imx_dma_rxint no longer needs to be called to try and start dma.
It won't start dma because dma_is_rxing is
already true meaning dma is already started.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Troy Kisky 2017-10-20 14:20:20 -07:00 committed by Greg Kroah-Hartman
parent 52108109fa
commit 9ce99a3a92
1 changed files with 2 additions and 28 deletions
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30
drivers/tty/serial/imx.c
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@ -732,29 +732,6 @@ static void imx_disable_rx_int(struct imx_port *sport)
}
static void clear_rx_errors(struct imx_port *sport);
static int start_rx_dma(struct imx_port *sport);
/*
* If the RXFIFO is filled with some data, and then we
* arise a DMA operation to receive them.
*/
static void imx_dma_rxint(struct imx_port *sport)
{
unsigned long temp;
unsigned long flags;
spin_lock_irqsave(&sport->port.lock, flags);
temp = readl(sport->port.membase + USR2);
if ((temp & USR2_RDR) && !sport->dma_is_rxing) {
imx_disable_rx_int(sport);
/* tell the DMA to receive the data. */
start_rx_dma(sport);
}
spin_unlock_irqrestore(&sport->port.lock, flags);
}
/*
* We have a modem side uart, so the meanings of RTS and CTS are inverted.
@ -816,11 +793,8 @@ static irqreturn_t imx_int(int irq, void *dev_id)
sts = readl(sport->port.membase + USR1);
sts2 = readl(sport->port.membase + USR2);
if (sts & (USR1_RRDY | USR1_AGTIM)) {
if (sport->dma_is_enabled)
imx_dma_rxint(sport);
else
imx_rxint(irq, dev_id);
if (!sport->dma_is_enabled && (sts & (USR1_RRDY | USR1_AGTIM))) {
imx_rxint(irq, dev_id);
ret = IRQ_HANDLED;
}