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[PATCH 3/3] hw/char: cadence_uart: Move clock/reset check to uart_can_re
From: |
Bin Meng |
Subject: |
[PATCH 3/3] hw/char: cadence_uart: Move clock/reset check to uart_can_receive() |
Date: |
Mon, 23 Aug 2021 10:08:13 +0800 |
Currently the clock/reset check is done in uart_receive(), but we
can move the check to uart_can_receive() which is earlier.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
---
hw/char/cadence_uart.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c
index 154be34992..7326445385 100644
--- a/hw/char/cadence_uart.c
+++ b/hw/char/cadence_uart.c
@@ -235,6 +235,12 @@ static void uart_parameters_setup(CadenceUARTState *s)
static int uart_can_receive(void *opaque)
{
CadenceUARTState *s = opaque;
+
+ /* ignore characters when unclocked or in reset */
+ if (!clock_is_enabled(s->refclk) || device_is_in_reset(DEVICE(s))) {
+ return 0;
+ }
+
int ret = MAX(CADENCE_UART_RX_FIFO_SIZE, CADENCE_UART_TX_FIFO_SIZE);
uint32_t ch_mode = s->r[R_MR] & UART_MR_CHMODE;
@@ -358,11 +364,6 @@ static void uart_receive(void *opaque, const uint8_t *buf,
int size)
CadenceUARTState *s = opaque;
uint32_t ch_mode = s->r[R_MR] & UART_MR_CHMODE;
- /* ignore characters when unclocked or in reset */
- if (!clock_is_enabled(s->refclk) || device_is_in_reset(DEVICE(s))) {
- return;
- }
-
if (ch_mode == NORMAL_MODE || ch_mode == ECHO_MODE) {
uart_write_rx_fifo(opaque, buf, size);
}
--
2.25.1
- [PATCH 2/3] hw/char: cadence_uart: Disable transmit when input clock is disabled, (continued)
[PATCH 3/3] hw/char: cadence_uart: Move clock/reset check to uart_can_receive(),
Bin Meng <=