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serial: sirf: don't submit dma desc after timeout irqs occur

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In rx timeout ISR and tasklet, we don't issue new dma desc as rx_done ISR
will do that.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Qipan Li 2013-09-21 09:02:10 +08:00 committed by Greg Kroah-Hartman
parent 66be084885
commit 59f8a62c25
1 changed files with 9 additions and 2 deletions
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11
drivers/tty/serial/sirfsoc_uart.c
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@ -529,7 +529,7 @@ static void sirfsoc_rx_tmo_process_tl(unsigned long param)
while (sirfport->rx_completed != sirfport->rx_issued) {
sirfsoc_uart_insert_rx_buf_to_tty(sirfport,
SIRFSOC_RX_DMA_BUF_SIZE);
sirfsoc_rx_submit_one_dma_desc(port, sirfport->rx_completed++);
sirfport->rx_completed++;
sirfport->rx_completed %= SIRFSOC_RX_LOOP_BUF_CNT;
}
count = CIRC_CNT(sirfport->rx_dma_items[sirfport->rx_issued].xmit.head,
@ -706,12 +706,19 @@ static void sirfsoc_uart_rx_dma_complete_tl(unsigned long param)
{
struct sirfsoc_uart_port *sirfport = (struct sirfsoc_uart_port *)param;
struct uart_port *port = &sirfport->port;
struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
unsigned long flags;
spin_lock_irqsave(&sirfport->rx_lock, flags);
while (sirfport->rx_completed != sirfport->rx_issued) {
sirfsoc_uart_insert_rx_buf_to_tty(sirfport,
SIRFSOC_RX_DMA_BUF_SIZE);
sirfsoc_rx_submit_one_dma_desc(port, sirfport->rx_completed++);
if (rd_regl(port, ureg->sirfsoc_int_en_reg) &
uint_en->sirfsoc_rx_timeout_en)
sirfsoc_rx_submit_one_dma_desc(port,
sirfport->rx_completed++);
else
sirfport->rx_completed++;
sirfport->rx_completed %= SIRFSOC_RX_LOOP_BUF_CNT;
}
spin_unlock_irqrestore(&sirfport->rx_lock, flags);