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Date: Fri, 20 Nov 2015 14:50:40 -0800
From: Darren Hart <dvhart@...radead.org>
To: Azael Avalos <coproscefalo@...il.com>
Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
Fabian Koester <fabian.koester@...ngnow.com>
Subject: Re: [PATCH v2 2/2] toshiba_acpi: Add WWAN RFKill support
On Thu, Nov 19, 2015 at 08:49:25AM -0700, Azael Avalos wrote:
Hi Azael,
> A previuos patch added WWAN support to the driver, allowing to query
> and set the device status.
>
> This patch adds RFKill support for the recently introduced WWAN device,
> making use of the WWAN and *wireless_status functions to query the
> killswitch and (de)activate the device accordingly to its status.
>
> Signed-off-by: Fabian Koester <fabian.koester@...ngnow.com>
So this is Fabian's code which he sent to you and you are submitting on his
behalf?
> Signed-off-by: Azael Avalos <coproscefalo@...il.com>
A couple minor nits below.
> ---
> drivers/platform/x86/toshiba_acpi.c | 79 +++++++++++++++++++++++++++++++++++++
> 1 file changed, 79 insertions(+)
>
> diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
> index 60d1ad9..d1315c5 100644
> --- a/drivers/platform/x86/toshiba_acpi.c
> +++ b/drivers/platform/x86/toshiba_acpi.c
> @@ -51,6 +51,7 @@
> #include <linux/dmi.h>
> #include <linux/uaccess.h>
> #include <linux/miscdevice.h>
> +#include <linux/rfkill.h>
> #include <linux/toshiba.h>
> #include <acpi/video.h>
>
> @@ -174,6 +175,7 @@ struct toshiba_acpi_dev {
> struct led_classdev kbd_led;
> struct led_classdev eco_led;
> struct miscdevice miscdev;
> + struct rfkill *wwan_rfk;
>
> int force_fan;
> int last_key_event;
> @@ -2330,6 +2332,67 @@ static const struct file_operations toshiba_acpi_fops = {
> };
>
> /*
> + * WWAN RFKill handlers
> + */
> +static int toshiba_acpi_wwan_set_block(void *data, bool blocked)
> +{
> + struct toshiba_acpi_dev *dev = data;
> + int ret;
> +
> + ret = toshiba_wireless_status(dev);
> + if (ret)
> + return ret;
> +
> + if (!dev->killswitch)
> + return 0;
> +
> + return toshiba_wwan_set(dev, blocked ? 0 : 1);
You can avoid the ternary operation with binary output and just invert the
bool.
!blocked
> +}
> +
> +static void toshiba_acpi_wwan_poll(struct rfkill *rfkill, void *data)
> +{
> + struct toshiba_acpi_dev *dev = data;
> +
> + if (toshiba_wireless_status(dev))
> + return;
> +
> + rfkill_set_hw_state(dev->wwan_rfk, !dev->killswitch);
> +}
> +
> +static const struct rfkill_ops wwan_rfk_ops = {
> + .set_block = toshiba_acpi_wwan_set_block,
> + .poll = toshiba_acpi_wwan_poll,
> +};
> +
> +static int toshiba_acpi_setup_wwan_rfkill(struct toshiba_acpi_dev *dev)
> +{
> + int ret = toshiba_wireless_status(dev);
> +
> + if (ret)
> + return ret;
> +
> + dev->wwan_rfk = rfkill_alloc("Toshiba WWAN",
> + &dev->acpi_dev->dev,
> + RFKILL_TYPE_WWAN,
> + &wwan_rfk_ops,
> + dev);
> + if (!dev->wwan_rfk) {
> + pr_err("Unable to allocate WWAN rfkill device\n");
> + return -ENOMEM;
> + }
> +
> + rfkill_set_hw_state(dev->wwan_rfk, !dev->killswitch);
> +
> + ret = rfkill_register(dev->wwan_rfk);
> + if (ret) {
> + pr_err("Unable to register WWAN rfkill device\n");
> + rfkill_destroy(dev->wwan_rfk);
> + }
> +
> + return ret;
> +}
> +
> +/*
> * Hotkeys
> */
> static int toshiba_acpi_enable_hotkeys(struct toshiba_acpi_dev *dev)
> @@ -2688,6 +2751,11 @@ static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
> if (dev->eco_led_registered)
> led_classdev_unregister(&dev->eco_led);
>
> + if (dev->wwan_rfk) {
> + rfkill_unregister(dev->wwan_rfk);
> + rfkill_destroy(dev->wwan_rfk);
> + }
> +
> if (toshiba_acpi)
> toshiba_acpi = NULL;
>
> @@ -2827,6 +2895,8 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
> dev->fan_supported = !ret;
>
> toshiba_wwan_available(dev);
> + if (dev->wwan_supported)
> + toshiba_acpi_setup_wwan_rfkill(dev);
>
> print_supported_features(dev);
>
> @@ -2930,6 +3000,15 @@ static int toshiba_acpi_resume(struct device *device)
> pr_info("Unable to re-enable hotkeys\n");
> }
>
> + if (dev->wwan_rfk) {
> + int error = toshiba_wireless_status(dev);
> +
> + if (error)
> + return error;
For consistency, please use ret. You can just initialize it to 0 outside the if
block, use it inside, and return it outside as well. We don't buy much by
declaring inside the if block on a resume function.
> +
> + rfkill_set_hw_state(dev->wwan_rfk, !dev->killswitch);
> + }
> +
> return 0;
> }
> #endif
> --
> 2.6.2
>
>
--
Darren Hart
Intel Open Source Technology Center
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