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Date: Fri, 13 Jan 2017 23:08:13 +1030
From: Jonathan Woithe <jwoithe@...t42.net>
To: Micha?? K??pie?? <kernel@...pniu.pl>
Cc: Darren Hart <dvhart@...radead.org>,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] platform/x86: fujitsu-laptop: decrease indentation
in acpi_fujitsu_hotkey_notify()
On Wed, Jan 11, 2017 at 09:59:30AM +0100, Micha?? K??pie?? wrote:
> acpi_fujitsu_hotkey_notify() is pretty deeply nested, which hurts
> readability. Strip off one level of indentation by returning early when
> the event code supplied as argument is not ACPI_FUJITSU_NOTIFY_CODE1.
>
> Signed-off-by: Micha?? K??pie?? <kernel@...pniu.pl>
Acked-by: Jonathan Woithe <jwoithe@...t42.net>
> ---
> Changes introduced by this patch are best viewed when whitespace changes
> are ignored.
>
> drivers/platform/x86/fujitsu-laptop.c | 152 +++++++++++++++++-----------------
> 1 file changed, 75 insertions(+), 77 deletions(-)
>
> diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
> index b725a907a91f..c2022f8af51b 100644
> --- a/drivers/platform/x86/fujitsu-laptop.c
> +++ b/drivers/platform/x86/fujitsu-laptop.c
> @@ -1039,98 +1039,96 @@ static void acpi_fujitsu_hotkey_notify(struct acpi_device *device, u32 event)
>
> input = fujitsu_hotkey->input;
>
> + if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
> + keycode = KEY_UNKNOWN;
> + vdbg_printk(FUJLAPTOP_DBG_WARN,
> + "Unsupported event [0x%x]\n", event);
> + input_report_key(input, keycode, 1);
> + input_sync(input);
> + input_report_key(input, keycode, 0);
> + input_sync(input);
> + return;
> + }
> +
> if (fujitsu_hotkey->rfkill_supported)
> fujitsu_hotkey->rfkill_state =
> call_fext_func(FUNC_RFKILL, 0x4, 0x0, 0x0);
>
> - switch (event) {
> - case ACPI_FUJITSU_NOTIFY_CODE1:
> - i = 0;
> - while ((irb =
> - call_fext_func(FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0
> - && (i++) < MAX_HOTKEY_RINGBUFFER_SIZE) {
> - switch (irb & 0x4ff) {
> - case KEY1_CODE:
> - keycode = fujitsu->keycode1;
> - break;
> - case KEY2_CODE:
> - keycode = fujitsu->keycode2;
> - break;
> - case KEY3_CODE:
> - keycode = fujitsu->keycode3;
> - break;
> - case KEY4_CODE:
> - keycode = fujitsu->keycode4;
> - break;
> - case KEY5_CODE:
> - keycode = fujitsu->keycode5;
> - break;
> - case 0:
> - keycode = 0;
> - break;
> - default:
> + i = 0;
> + while ((irb =
> + call_fext_func(FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0
> + && (i++) < MAX_HOTKEY_RINGBUFFER_SIZE) {
> + switch (irb & 0x4ff) {
> + case KEY1_CODE:
> + keycode = fujitsu->keycode1;
> + break;
> + case KEY2_CODE:
> + keycode = fujitsu->keycode2;
> + break;
> + case KEY3_CODE:
> + keycode = fujitsu->keycode3;
> + break;
> + case KEY4_CODE:
> + keycode = fujitsu->keycode4;
> + break;
> + case KEY5_CODE:
> + keycode = fujitsu->keycode5;
> + break;
> + case 0:
> + keycode = 0;
> + break;
> + default:
> + vdbg_printk(FUJLAPTOP_DBG_WARN,
> + "Unknown GIRB result [%x]\n", irb);
> + keycode = -1;
> + break;
> + }
> + if (keycode > 0) {
> + vdbg_printk(FUJLAPTOP_DBG_TRACE,
> + "Push keycode into ringbuffer [%d]\n",
> + keycode);
> + status = kfifo_in_locked(&fujitsu_hotkey->fifo,
> + (unsigned char *)&keycode,
> + sizeof(keycode),
> + &fujitsu_hotkey->fifo_lock);
> + if (status != sizeof(keycode)) {
> vdbg_printk(FUJLAPTOP_DBG_WARN,
> - "Unknown GIRB result [%x]\n", irb);
> - keycode = -1;
> - break;
> + "Could not push keycode [0x%x]\n",
> + keycode);
> + } else {
> + input_report_key(input, keycode, 1);
> + input_sync(input);
> }
> - if (keycode > 0) {
> + } else if (keycode == 0) {
> + while ((status =
> + kfifo_out_locked(
> + &fujitsu_hotkey->fifo,
> + (unsigned char *) &keycode_r,
> + sizeof(keycode_r),
> + &fujitsu_hotkey->fifo_lock))
> + == sizeof(keycode_r)) {
> + input_report_key(input, keycode_r, 0);
> + input_sync(input);
> vdbg_printk(FUJLAPTOP_DBG_TRACE,
> - "Push keycode into ringbuffer [%d]\n",
> - keycode);
> - status = kfifo_in_locked(&fujitsu_hotkey->fifo,
> - (unsigned char *)&keycode,
> - sizeof(keycode),
> - &fujitsu_hotkey->fifo_lock);
> - if (status != sizeof(keycode)) {
> - vdbg_printk(FUJLAPTOP_DBG_WARN,
> - "Could not push keycode [0x%x]\n",
> - keycode);
> - } else {
> - input_report_key(input, keycode, 1);
> - input_sync(input);
> - }
> - } else if (keycode == 0) {
> - while ((status =
> - kfifo_out_locked(
> - &fujitsu_hotkey->fifo,
> - (unsigned char *) &keycode_r,
> - sizeof(keycode_r),
> - &fujitsu_hotkey->fifo_lock))
> - == sizeof(keycode_r)) {
> - input_report_key(input, keycode_r, 0);
> - input_sync(input);
> - vdbg_printk(FUJLAPTOP_DBG_TRACE,
> - "Pop keycode from ringbuffer [%d]\n",
> - keycode_r);
> - }
> + "Pop keycode from ringbuffer [%d]\n",
> + keycode_r);
> }
> }
> + }
>
> - /* On some models (first seen on the Skylake-based Lifebook
> - * E736/E746/E756), the touchpad toggle hotkey (Fn+F4) is
> - * handled in software; its state is queried using FUNC_RFKILL
> - */
> - if ((fujitsu_hotkey->rfkill_supported & BIT(26)) &&
> - (call_fext_func(FUNC_RFKILL, 0x1, 0x0, 0x0) & BIT(26))) {
> - keycode = KEY_TOUCHPAD_TOGGLE;
> - input_report_key(input, keycode, 1);
> - input_sync(input);
> - input_report_key(input, keycode, 0);
> - input_sync(input);
> - }
> -
> - break;
> - default:
> - keycode = KEY_UNKNOWN;
> - vdbg_printk(FUJLAPTOP_DBG_WARN,
> - "Unsupported event [0x%x]\n", event);
> + /* On some models (first seen on the Skylake-based Lifebook
> + * E736/E746/E756), the touchpad toggle hotkey (Fn+F4) is
> + * handled in software; its state is queried using FUNC_RFKILL
> + */
> + if ((fujitsu_hotkey->rfkill_supported & BIT(26)) &&
> + (call_fext_func(FUNC_RFKILL, 0x1, 0x0, 0x0) & BIT(26))) {
> + keycode = KEY_TOUCHPAD_TOGGLE;
> input_report_key(input, keycode, 1);
> input_sync(input);
> input_report_key(input, keycode, 0);
> input_sync(input);
> - break;
> }
> +
> }
>
> /* Initialization */
> --
> 2.11.0
--
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