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Subject[PATCH 05/12] HID: input: rework spaghetti code with switch statements
Date
Instead of using multiple `if (a == b)`, use the switch statement
which has been done exactly for that.

There should be no functional change (I don't expect moving down
HID_QUIRK_{X|Y}_INVERT having any impact.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
---
drivers/hid/hid-input.c | 80 ++++++++++++++++++++++-------------------
1 file changed, 43 insertions(+), 37 deletions(-)

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index d2562497a726..54b3e9c5ccc4 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1354,12 +1354,6 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct

input = field->hidinput->input;

- if (usage->type == EV_ABS &&
- (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
- ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))) {
- value = field->logical_maximum - value;
- }
-
if (usage->hat_min < usage->hat_max || usage->hat_dir) {
int hat_dir = usage->hat_dir;
if (!hat_dir)
@@ -1370,12 +1364,12 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
return;
}

- if (usage->hid == HID_DG_INVERT) {
+ switch (usage->hid) {
+ case HID_DG_INVERT:
*quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
return;
- }

- if (usage->hid == HID_DG_INRANGE) {
+ case HID_DG_INRANGE:
if (value) {
input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
return;
@@ -1383,46 +1377,58 @@ void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct
input_event(input, usage->type, usage->code, 0);
input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
return;
- }

- if (usage->hid == HID_DG_TIPPRESSURE && (*quirks & HID_QUIRK_NOTOUCH)) {
- int a = field->logical_minimum;
- int b = field->logical_maximum;
- input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
- }
+ case HID_DG_TIPPRESSURE:
+ if (*quirks & HID_QUIRK_NOTOUCH) {
+ int a = field->logical_minimum;
+ int b = field->logical_maximum;
+
+ input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
+ }
+ break;

- if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */
+ case HID_UP_PID | 0x83UL: /* Simultaneous Effects Max */
dbg_hid("Maximum Effects - %d\n",value);
return;
- }

- if (usage->hid == (HID_UP_PID | 0x7fUL)) {
+ case HID_UP_PID | 0x7fUL:
dbg_hid("PID Pool Report\n");
return;
}

- if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UNKNOWN */
- return;
+ switch (usage->type) {
+ case EV_KEY:
+ if (usage->code == 0) /* Key 0 is "unassigned", not KEY_UNKNOWN */
+ return;
+ break;

- if ((usage->type == EV_REL) && (usage->code == REL_WHEEL_HI_RES ||
- usage->code == REL_HWHEEL_HI_RES)) {
- hidinput_handle_scroll(usage, input, value);
- return;
- }
+ case EV_REL:
+ if (usage->code == REL_WHEEL_HI_RES ||
+ usage->code == REL_HWHEEL_HI_RES) {
+ hidinput_handle_scroll(usage, input, value);
+ return;
+ }
+ break;

- if ((usage->type == EV_ABS) && (field->flags & HID_MAIN_ITEM_RELATIVE) &&
- (usage->code == ABS_VOLUME)) {
- int count = abs(value);
- int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
- int i;
+ case EV_ABS:
+ if ((field->flags & HID_MAIN_ITEM_RELATIVE) &&
+ usage->code == ABS_VOLUME) {
+ int count = abs(value);
+ int direction = value > 0 ? KEY_VOLUMEUP : KEY_VOLUMEDOWN;
+ int i;
+
+ for (i = 0; i < count; i++) {
+ input_event(input, EV_KEY, direction, 1);
+ input_sync(input);
+ input_event(input, EV_KEY, direction, 0);
+ input_sync(input);
+ }
+ return;

- for (i = 0; i < count; i++) {
- input_event(input, EV_KEY, direction, 1);
- input_sync(input);
- input_event(input, EV_KEY, direction, 0);
- input_sync(input);
- }
- return;
+ } else if (((*quirks & HID_QUIRK_X_INVERT) && usage->code == ABS_X) ||
+ ((*quirks & HID_QUIRK_Y_INVERT) && usage->code == ABS_Y))
+ value = field->logical_maximum - value;
+ break;
}

/*
--
2.33.1
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