target/linux/ramips/patches-3.10/0008-serial-MIPS-lantiq-fix-clock-error-check.patch

   1 From d94da02421c14fa9295feb218cd45fc01d0f470b Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Thu, 8 Aug 2013 17:19:42 +0200
   4 Subject: [PATCH 08/25] serial: MIPS: lantiq: fix clock error check
   5
   6 The clk should be checked with the proper IS_ERR() api before accessing it.
   7
   8 Signed-off-by: John Crispin <blogic@openwrt.org>
   9 ---
  10  drivers/tty/serial/lantiq.c |    4 ++--
  11  1 file changed, 2 insertions(+), 2 deletions(-)
  12
  13 --- a/drivers/tty/serial/lantiq.c
  14 +++ b/drivers/tty/serial/lantiq.c
  15 @@ -318,7 +318,7 @@ lqasc_startup(struct uart_port *port)
  16         struct ltq_uart_port *ltq_port = to_ltq_uart_port(port);
  17         int retval;
  18
  19 -       if (ltq_port->clk)
  20 +       if (!IS_ERR(ltq_port->clk))
  21                 clk_enable(ltq_port->clk);
  22         port->uartclk = clk_get_rate(ltq_port->fpiclk);
  23
  24 @@ -386,7 +386,7 @@ lqasc_shutdown(struct uart_port *port)
  25                 port->membase + LTQ_ASC_RXFCON);
  26         ltq_w32_mask(ASCTXFCON_TXFEN, ASCTXFCON_TXFFLU,
  27                 port->membase + LTQ_ASC_TXFCON);
  28 -       if (ltq_port->clk)
  29 +       if (!IS_ERR(ltq_port->clk))
  30                 clk_disable(ltq_port->clk);
  31  }
  32