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devices: net: Avoid causing busy loop for interrupt resample

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We must have read the resample event before calling
`SignalableInterrupt::do_interrupt_resample`.

BUG=b:179755448
TEST=run crosvm with net device

Change-Id: Ic4bd74d3c89cc8af69401d2c1ebc095a474fba04
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2902057
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Commit-Queue: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: Daniel Verkamp <dverkamp@chromium.org>
This commit is contained in:
Keiichi Watanabe 2021-05-18 09:53:26 +09:00 committed by Commit Bot
parent 1b21dec7b1
commit 03f4c754d7
1 changed files with 2 additions and 0 deletions
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2
devices/src/virtio/net.rs
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@ -428,6 +428,8 @@ where
}
}
Token::InterruptResample => {
// We can unwrap safely because interrupt must have the event.
let _ = self.interrupt.get_resample_evt().unwrap().read();
self.interrupt.do_interrupt_resample();
}
Token::Kill => {