On Wed, Jun 17, 2015 at 09:51:21AM -0300, Fabio Estevam wrote:
> From: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
>
> Disable interrupts before requesting them in order to fix a kernel oops
> after lauching a kernel via kexec.
>
> Tested on a imx6sl-evk board.
>
> Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
> ---
> Changes since v1:
> - Do not clear the whole UCR1 register. Only clear the irq bits as
> suggested by Uwe
> - Enable/disable the ipg clock to access the UCR1 register
>
> drivers/tty/serial/imx.c | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
> index 2c90dc3..0f29cd059 100644
> --- a/drivers/tty/serial/imx.c
> +++ b/drivers/tty/serial/imx.c
> @@ -1902,7 +1902,7 @@ static int serial_imx_probe(struct platform_device *pdev)
> {
> struct imx_port *sport;
> void __iomem *base;
> - int ret = 0;
> + int ret = 0, reg;
> struct resource *res;
> int txirq, rxirq, rtsirq;
>
> @@ -1957,6 +1957,17 @@ static int serial_imx_probe(struct platform_device *pdev)
>
> sport->port.uartclk = clk_get_rate(sport->clk_per);
>
> + /* For register access, we only need to enable the ipg clock. */
> + clk_prepare_enable(sport->clk_ipg);
What happens if clk_prepare_enable fails?
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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