target/linux/leon/patches-5.15/0014-sparc32-leon-prevent-long-uart-fifo-discovery-loop.patch

   1 From 5d82acbb9a8c98fe7eb86a59f3f1471a713f8c92 Mon Sep 17 00:00:00 2001
   2 From: Konrad Eisele <konrad@gaisler.com>
   3 Date: Tue, 10 Apr 2012 15:22:11 +0200
   4 Subject: [PATCH 14/32] sparc32,leon: prevent long uart fifo discovery loop
   5
   6 On GR712 uart might be disabled. To avoid spinning forever limit loopcount
   7
   8 Signed-off-by: Konrad Eisele <konrad@gaisler.com>
   9 ---
  10  drivers/tty/serial/apbuart.c | 2 +-
  11  1 file changed, 1 insertion(+), 1 deletion(-)
  12
  13 diff --git a/drivers/tty/serial/apbuart.c b/drivers/tty/serial/apbuart.c
  14 index e8d56e899ec7..a22c48e5d217 100644
  15 --- a/drivers/tty/serial/apbuart.c
  16 +++ b/drivers/tty/serial/apbuart.c
  17 @@ -363,7 +363,7 @@ static int apbuart_scan_fifo_size(struct uart_port *port, int portnumber)
  18
  19         UART_PUT_CTRL(port, ctrl | UART_CTRL_TE);
  20
  21 -       while (!UART_TX_READY(UART_GET_STATUS(port)))
  22 +       while ((!UART_TX_READY(UART_GET_STATUS(port))) && loop < 0x7fffff)
  23                 loop++;
  24
  25         /*
  26 --
  27 2.34.1
  28