From 7282cec90365533befce1552ab09edbcd0af0dbd Mon Sep 17 00:00:00 2001 From: Qipan Li Date: Thu, 3 Jul 2014 21:26:59 +0800 Subject: serial: sirf: transfer more bytes once to decrease interrupts the current codes send 1 bytes, then after getting TX done interrupt, send subsequent bytes. it causes redundant interrupts. for example, if we have 3 bytes in TX buffer, the TX flow is: 1. send 1 byte 2. get TX down interrupt 3. send the left 2 bytes 4. get TX down interrupt this patch moves to send more bytes and decrease interrupts, the new flow is: 1. send 3 bytes 2. get TX down interrupt Signed-off-by: Qipan Li Signed-off-by: Barry Song Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sirfsoc_uart.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty/serial/sirfsoc_uart.h') diff --git a/drivers/tty/serial/sirfsoc_uart.h b/drivers/tty/serial/sirfsoc_uart.h index 69a62eb..6a7ebf7 100644 --- a/drivers/tty/serial/sirfsoc_uart.h +++ b/drivers/tty/serial/sirfsoc_uart.h @@ -449,4 +449,4 @@ struct sirfsoc_uart_port { /* I/O Mode */ #define SIRFSOC_UART_IO_RX_MAX_CNT 256 -#define SIRFSOC_UART_IO_TX_REASONABLE_CNT 6 +#define SIRFSOC_UART_IO_TX_REASONABLE_CNT 256 -- cgit v1.1