From 198201509a460c8f1b85e3447b35599129f4f885 Mon Sep 17 00:00:00 2001 From: Chen Baozi Date: Mon, 19 Jul 2021 15:36:04 +0800 Subject: [PATCH] serial: pl011: Resend the character if FIFO is full in debug uart pl01x_putc() might return -EAGAIN if there was no space in FIFO. In that case, high-level caller should wait until there is space and resend the character. Signed-off-by: Chen Baozi Reviewed-by: Stefan Roese Reviewed-by: Simon Glass --- drivers/serial/serial_pl01x.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c index 76b96ad414..8ff19acf33 100644 --- a/drivers/serial/serial_pl01x.c +++ b/drivers/serial/serial_pl01x.c @@ -417,7 +417,8 @@ static inline void _debug_uart_putc(int ch) { struct pl01x_regs *regs = (struct pl01x_regs *)CONFIG_DEBUG_UART_BASE; - pl01x_putc(regs, ch); + while (pl01x_putc(regs, ch) == -EAGAIN) + ; } DEBUG_UART_FUNCS -- 2.39.5