On Mon, Jan 08, 2018 at 01:42:32PM +0100, Johan Hovold wrote:
> Serdev controllers are not bound to any drivers and it therefore makes
> no sense to generate modaliases for them.
>
> This has already been fixed separately for ACPI controllers for which
> uevent errors were also being logged during probe due to the missing
> ACPI companions (from which ACPI modaliases are generated).
>
> This patch moves the modalias handling from the bus type to the client
> device type. Specifically, this means that only serdev devices (a.k.a.
> clients or slaves) will have have MODALIAS fields in their uevent
> environments and corresponding modalias sysfs attributes.
>
> Reported-by: Hans de Goede <hdego...@redhat.com>
> Signed-off-by: Johan Hovold <jo...@kernel.org>
> ---
> drivers/tty/serdev/core.c | 72
> ++++++++++++++++++++++-------------------------
> 1 file changed, 34 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
> index 5dc88f61f506..61c85e49e178 100644
> --- a/drivers/tty/serdev/core.c
> +++ b/drivers/tty/serdev/core.c
> @@ -19,6 +19,38 @@
> static bool is_registered;
> static DEFINE_IDA(ctrl_ida);
>
> +static ssize_t modalias_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + int len;
> +
> + len = acpi_device_modalias(dev, buf, PAGE_SIZE - 1);
> + if (len != -ENODEV)
> + return len;
> +
> + return of_device_modalias(dev, buf, PAGE_SIZE);
> +}
> +DEVICE_ATTR_RO(modalias);
static?
Sorry, minor nit :(
