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Fix panic problem in tty driver

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This commit is contained in:
Jianfeng Jiang
2023-10-10 17:45:53 +08:00
committed by Tate, Hongliang Tian
parent 0d6f6f001c
commit 342bbdc0c4
1 changed files with 11 additions and 2 deletions
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13
services/libs/jinux-std/src/device/tty/line_discipline.rs
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@ -107,7 +107,7 @@ impl LineDiscipline {
// Raw mode
if !termios.is_canonical_mode() {
self.read_buffer.lock_irq_disabled().push_overwrite(item);
self.update_readable_state();
self.update_readable_state_deferred();
return;
}
@ -147,7 +147,7 @@ impl LineDiscipline {
self.output_char(item, &termios, echo_callback);
}
self.update_readable_state();
self.update_readable_state_deferred();
}
fn may_send_signal_to_foreground(&self, termios: &KernelTermios, item: u8) {
@ -173,6 +173,15 @@ impl LineDiscipline {
}
fn update_readable_state(&self) {
let buffer = self.read_buffer.lock_irq_disabled();
if !buffer.is_empty() {
self.pollee.add_events(IoEvents::IN);
} else {
self.pollee.del_events(IoEvents::IN);
}
}
fn update_readable_state_deferred(&self) {
let buffer = self.read_buffer.lock_irq_disabled();
let pollee = self.pollee.clone();
// add/del events may sleep, so only construct parameters here.