On Tue, Feb 28, 2017 at 9:08 AM, Alban Bedel
<alban.be...@avionic-design.de> wrote:
> On DT systems the driver require a clock, but the probe just print a
> warning and continue, leading to a crash when resetting the device.
> To fix this crash and properly handle probe deferals only ignore the
> missing clock if DT isn't used or if the clock doesn't exist.
>
> Signed-off-by: Alban Bedel <alban.be...@avionic-design.de>
> ---
> drivers/net/ethernet/apm/xgene/xgene_enet_main.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
> b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
> index d0d0d12b531f..68b48edc5921 100644
> --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
> +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
> @@ -1756,6 +1756,12 @@ static int xgene_enet_get_resources(struct
> xgene_enet_pdata *pdata)
>
> pdata->clk = devm_clk_get(&pdev->dev, NULL);
> if (IS_ERR(pdata->clk)) {
> + /* Abort if the clock is defined but couldn't be retrived.
> + * Always abort if the clock is missing on DT system as
> + * the driver can't cope with this case.
> + */
> + if (PTR_ERR(pdata->clk) != -ENOENT || dev->of_node)
> + return PTR_ERR(pdata->clk);
> /* Firmware may have set up the clock already. */
> dev_info(dev, "clocks have been setup already\n");
> }
> --
> 2.11.0
>
Thanks, Alban.
Acked-by: Iyappan Subramanian <isubraman...@apm.com>
