diff mbox series

[1/1] HID: usbhid: hid-pidff: Set Replay Length to Infinite when set to 0

Message ID 20220930225127.Horde.AdDRdase1XW5AUKNNLyXVo3@cloud.brak.space
State New
Headers show
Series [1/1] HID: usbhid: hid-pidff: Set Replay Length to Infinite when set to 0 | expand

Commit Message

Paul Dino Jones Sept. 30, 2022, 10:51 p.m. UTC 
Greetings,
 
Started using my Accuforce v2 Sim wheel on Linux. I was getting no response from racing simulators through Wine, but native linux test tools worked fine. It seems that many real-world applications will send 0 as the replay length, which was resulting in the behavior I was experiencing (nothing). It makes sense to interpret 0 as an infinite effect and therefore set the replay length of the effect to 0xffff. While the PID document does not explicitly state that 0 should be infinite, it does hint toward null values being interpreted as infinite.
 
---

Comments

Slade Watkins Oct. 2, 2022, 11:25 a.m. UTC | #1 
Hi,

> On Sep 30, 2022, at 6:51 PM, Paul Jones <paul@spacefreak18.xyz> wrote:
> 
> Greetings,
>  
> Started using my Accuforce v2 Sim wheel on Linux. I was getting no response from racing simulators through Wine, but native linux test tools worked fine. It seems that many real-world applications will send 0 as the replay length, which was resulting in the behavior I was experiencing (nothing). It makes sense to interpret 0 as an infinite effect and therefore set the replay length of the effect to 0xffff. While the PID document does not explicitly state that 0 should be infinite, it does hint toward null values being interpreted as infinite.
>  
> ---

No Signed-off-by? 

Also, the formatting is weird here.

-srw
diff mbox series

Patch

diff --git a/drivers/hid/usbhid/hid-pidff.c b/drivers/hid/usbhid/hid-pidff.c
index 3b4ee21cd811..70653451c860 100644
--- a/drivers/hid/usbhid/hid-pidff.c
+++ b/drivers/hid/usbhid/hid-pidff.c
@@ -301,7 +301,7 @@  static void pidff_set_effect_report(struct pidff_device *pidff,
 pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0];
pidff->set_effect_type->value[0] =
 pidff->create_new_effect_type->value[0];
- pidff->set_effect[PID_DURATION].value[0] = effect->replay.length;
+ pidff->set_effect[PID_DURATION].value[0] = effect->replay.length == 0 ? 0xffff : effect->replay.length;
pidff->set_effect[PID_TRIGGER_BUTTON].value[0] = effect->trigger.button;
pidff->set_effect[PID_TRIGGER_REPEAT_INT].value[0] =
 effect->trigger.interval;