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fix: stop OTG LED listener spin after USB disconnect

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This commit is contained in:
uranami
2026-07-19 09:41:54 +08:00
parent 05c5f45995
commit 694afdd07f
1 changed files with 14 additions and 5 deletions
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19
src/hid/otg.rs
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@@ -94,6 +94,7 @@ pub struct OtgBackend {
} }
const HID_WRITE_TIMEOUT_MS: i32 = 20; const HID_WRITE_TIMEOUT_MS: i32 = 20;
const OTG_RUNTIME_POLL_INTERVAL: Duration = Duration::from_millis(500);
impl OtgBackend { impl OtgBackend {
/// Gadget must already exist; paths come from `OtgService`. /// Gadget must already exist; paths come from `OtgService`.
@@ -587,7 +588,7 @@ impl OtgBackend {
path.display(), path.display(),
err err
); );
thread::sleep(Duration::from_millis(500)); thread::sleep(OTG_RUNTIME_POLL_INTERVAL);
return false; return false;
} }
} }
@@ -611,6 +612,7 @@ impl OtgBackend {
if revents.contains(PollFlags::POLLERR) || revents.contains(PollFlags::POLLHUP) { if revents.contains(PollFlags::POLLERR) || revents.contains(PollFlags::POLLHUP) {
*file = None; *file = None;
thread::sleep(OTG_RUNTIME_POLL_INTERVAL);
return true; return true;
} }
@@ -633,8 +635,13 @@ impl OtgBackend {
Ok(_) => false, Ok(_) => false,
Err(err) if err.kind() == std::io::ErrorKind::WouldBlock => false, Err(err) if err.kind() == std::io::ErrorKind::WouldBlock => false,
Err(err) => { Err(err) => {
warn!("OTG keyboard LED listener read failed: {}", err); if err.raw_os_error() == Some(libc::ESHUTDOWN) {
debug!("OTG keyboard LED listener disconnected: {}", err);
} else {
warn!("OTG keyboard LED listener read failed: {}", err);
}
*file = None; *file = None;
thread::sleep(OTG_RUNTIME_POLL_INTERVAL);
true true
} }
} }
@@ -642,6 +649,7 @@ impl OtgBackend {
Err(err) => { Err(err) => {
warn!("OTG keyboard LED listener poll failed: {}", err); warn!("OTG keyboard LED listener poll failed: {}", err);
*file = None; *file = None;
thread::sleep(OTG_RUNTIME_POLL_INTERVAL);
true true
} }
} }
@@ -676,7 +684,7 @@ impl OtgBackend {
changed = true; changed = true;
} }
if keyboard_leds_enabled { if keyboard_leds_enabled && current_udc_configured {
if let Some(path) = keyboard_path.as_ref() { if let Some(path) = keyboard_path.as_ref() {
changed |= Self::poll_keyboard_led_once( changed |= Self::poll_keyboard_led_once(
&mut keyboard_led_file, &mut keyboard_led_file,
@@ -684,10 +692,11 @@ impl OtgBackend {
&led_state, &led_state,
); );
} else { } else {
thread::sleep(Duration::from_millis(500)); thread::sleep(OTG_RUNTIME_POLL_INTERVAL);
} }
} else { } else {
thread::sleep(Duration::from_millis(500)); keyboard_led_file = None;
thread::sleep(OTG_RUNTIME_POLL_INTERVAL);
} }
if changed { if changed {